1991-79RESOLUTION NO. 91- 79
A RESOLUTION CONCERNING THE PUBLIC HEARING DRAFT OF
THE LAKE COUNTY WATERSHED DEVELOPMENT ORDINANCE
WHEREAS, the Lake County Stormwater Management Commission has
prepared a Draft Lake County Watershed Development Ordinance and is now
soliciting public input on the Draft Ordinance;
NOW, THEREFORE, BE IT RESOLVED by the Village President and Board
of Trustees of the Village of Buffalo Grove, Lake and Cook Counties,
Illinois, as follows:
1. A review of the Draft Ordinance has identified the following problems:
a. Page 6, item B.l.b(1) The 0.04 cfs per acre discharge rate for
2 -year events should be deleted since the detrimental effect on
basins intended to serve recreational purposes with "dry bottoms"
or "dry areas" would outweigh any benefits this provision might
provide. This provision would swamp out the lower portion of areas
intended for secondary recreational dry weather uses.
b. Page 7, item B.1.C(1) This section should be deleted. This section
is not clear as to what it means, but it appears to encourage
drainage schemes that would be technically inappropriate in many
areas and could greatly restrict the ability of local
municipalities to work with developers to achieve locally desired
multi- purpose usages (such as recreation) in stormwater detention
areas.
C. Page 18, item 4.a(1) and (2) Apparent typos need to be corrected to
make these read correctly.
d. The proposed wetland regulation provisions appear to create new
regulations and another level of regulatory control over wetlands
within municipal jurisdictions in addition to the existing federal
regulations which are already very restrictive and already result
in unreasonably slow processing of developmental proposals.
® W
e. The draft wetlands regulation provisions which establish
prohibitions against work in wetlands which are identified as
having "exceptional value" pursuant to the U.S.E.P.A. Lake County
Advanced Wetland Identification Study (ADID) might be highly
objectionable if any of the low quality wetlands in the Buffalo
Grove area or in the path of the Route 53 extension were to be
identified in this report as having "exceptional value ". Since
this study does not yet exist, it is not possible to evaluate the
potential impacts of these provisions.
f. Aside from the wetlands regulatory aspects of the draft ordinance,
the ordinance appears to provide for a significant degree of
administrative interpretation and flexibility which might be
utilized to create an unreasonably restrictive impediment to
development and other capital improvement projects which would be
implemented in accordance with municipal comprehensive planning
objectives, although it also appears possible that the flexibility
which is written into the draft ordinance could be utilized to
accomplish an effective administrative implementation of reasonable
drainage policies.
g. Since the technical reference manual is not available for
simultaneous review with the draft ordinance, the entire effect of
the ordinance could be significantly altered at such time the
reference manual is finalized.
h. Appendix B does not properly include reference to the Village of
Buffalo Grove Flood Insurance Study.
2. The Lake County Board is urged to defer approval of the draft ordinance
until the above noted problems are fully corrected.
a 0
3. The Village Manager is authorized and directed to transmit this
Resolution to the Lake County Stormwater Management Commission and the
Lake County Board.
AYES: 6 - Marienthal, Reid, Kahn, Rubin, Braiman, Hendricks
NAYES: 0 - None
ABSENT: 0 - None
PASSED: November 4
APPROVED: November 4
ATTEST:,
&Aela-w-
Villiije Clerk
APA69
, 1991
, 1991
VIttED Bum" GROVE
puwc w� S
LAKE COUNTY WATERSHED DEVELOPMENT ORDINANCE
of
LAKE COUNTY, ILLINOIS
PUBLIC HEARING DRAFT
September 1991
Prepared by
the
LAKE COUNTY STORMWATER MANAGEMENT COMMISSION
PUBLIC HEARING DRAFT
LAKE COUNTY WATERSHED DEVELOPMENT ORDINANCE
September 1991,
TABLE OF CONTENTS
Title
Paoe
INTRODUCTION . . . . .
. . .
ARTICLEI:
PURPOSE . . . .
. . . . . . . . . . . . . . .
. . . . . . . .
. 1
ARTICLE
II: ORDINANCE ENFORCEMENT
. . . . . . . . . . .
. . . . . . . .
. 2
ARTICLE
III: COMMUNITY CERTIFICATION . . . . . . . . . .
. . . . . . . .
3
A.
CRITERIA . . .
.
B.
. . . . . . . . . . .
PROCESS . . .
3
. . . . . . . . . . . . . . . .
. . . . . . . .
. 3
ARTICLE
IV: WATERSHED DEVELOPMENT PERMITS . . .
4
A.
GENERAL
'
1. Regulated Development . . . . . . .
. . . . . . . .
4
2. Development Classification . . . . .
. . .
5
3. Permit Fees . . . . . . . . . . . .
. . . . . . .
.
5
4. Contiguous Property . . . . . . .
.
. . '
.
5
5
B.
ALL DEVELOPMENT . . .
. . . .
'
. . . . . . . . .
1. Performance Standards
. . . . .
.
. . . . .
. 6
a. Runoff Calculations . . . . .
. . .
6
b. Release Rates and Discharges .
. . . . . . . .
. 6
C. Runoff Volume Reduction Hierarchy
. . . . . . . .
. 7
d. Fee -in -Lieu of On -Site Detention
. . . . . . .
. 7
e. Detention Facility . . . . . .
. .
g
f. Storm Sewer . . . . . . . .
. . . . . . . .
. 8
.
g. Streams and Channels . . . .
. . . . .
. 8
h. Lakes, Ponds and Wetlands . . . .
. . .
9
i. Buffer Area . . �
. .
9
j. Soil Erosion and Sediment Control
11
2. Application Requirements . . •
13
a. Application Requirementsfor•Minor
Developments .
. 13
b. Application Requirements for Major
Developments .
. 13
C.
FLOODPLAIN DEVELOPMENTS . . . . . . . . .
15
1. General Information
*to
.
15
2. Performance Standards Applicable all
Floodpiain
Development
• • •
3. Additional Performance Standards fortheFloodFringe
. .
. 16
17
4. Additional-Performance Standards for the
Floodway
(IDOT /DWR Regulations) . .
18
S. Special Considerations for theConstruction
of New
.
Bridges or Culvert Crossings and Roadway
Approaches
21
6. Additional Plan Submittal Requirements for Floodplain
.
Development . . . . .
D.
. . . . . . . .
WETLAND PROVISIONS .
. '
. . . . .
' 22
. . . .
1. Wetland Performance Standards . .
.
. .
22
. 22
2. Submittal Requirements
. .
. . . .
E.
. .
PUBLIC ROAD DRAINAGE PERMIT REQUIREMENTS • .
. . . .
. 25
27
1. Performance Standards . . . . .
. . . .
.
27
2. Submittal Requirements . . .
....
. 27
-i-
fir �,,� � • . r
r
TABLE OF CONTENTS (CONTINUED)
-ii-
Pte_
Title
ARTICLE V: VARIANCES AND APPEALS . . . . . . . . . . . .
. . . . . . 27
. . 27
A. VARIANCES . . . . . . . . . . . . . . . . . .
. . . . . . .
. . . . 28
B. APPEALS . . . . . . . . . . . . . . . . . . .
. . . . .
ARTICLE VI: INSPECTIONS AND ACCESS . . . . . . . . . . .
. . . . . . . . . 28
ARTICLE VII: STORMWATER RECORDS . . . . . . . . . . . .
. . . . . . . . . 29
ARTICLE VIII: PENALTIES AND LEGAL ACTIONS . . . . . . .
. . . . . . . . . 29
ARTICLE IX: DISCLAIMER OF LIABILITY . . . . . . . . . .
. . . . . . . . . 29
. . 30
ARTICLEX: SEPARABILITY . . . . . . . . . . . . . . . .
. . . . . . .
. . . 30
ARTICLE XI: EFFECTIVE DATE . . . . . . . . . . . . .
. . . . . .
APPENDIX A
. . . 31
DEFINITIONS . . . . . . . . . . . . . . . . . . . .
. . . . .
APPENDIX B
. 37
REGULATORY FLOODWAY MAPS . . . . . . . . . . . . .
. . . . . . .
\ 6 '° co /(A'ri
-ii-
ARTICLE II: ORDINANCE ENFORCEMENT
A. This Ordinance is enacted pursuant to the police powers granted to
Lake County by Illinois revised Statutes, 1989, Chapter 34, Par.
5 -1062 and Chapter 19, Par. 52 et seq. and 65(g). The
administration and enforcement of this Ordinance shall be
performed by (a) certified communities, within their respective
jurisdictions and (b) the Stormwater Management Commission, and
its agents or employees, in all other areas of Lake County.
B. In Certified Communities, the appropriate development regulations
officer shall be the Enforcement Officer for the Ordinance. In
all other areas of Lake County, the SMC Director shall be the
Enforcement Officer.
C. The preparation of plats, replats. and Planned Unit Development
(PUD) are not included in the "Development" definition of this
Ordinance thus a Watershed Development Permit is not required
prior to approval of plats, replats and Planned Unit Development.
However, the following provisions do apply:
1. The performance standards for all development [Article IV,
Section C) shall be considered in site planning and
appropriately addressed in the drainage plan component of
plats, replats and Planned Unit Developments.
2. In addressing Article IV, Section C - lc "Runoff Volume
Reduction Hierarchy" streets, blocks, lots, easements, parks
and other public grounds shall be located and lined out in
such a manner as to preserve and utilize natural streams and
channels whenever possible (IDOT /DWR, Section 1100.3).
3. Plats, replats and PUDs shall include a signed statement by
a Registered Professional Engineer that the plat, replat or
PUD accounted for changes in the drainage of surface waters
in accordance with the Plat Act (NFIP /IDOT -DWR Section
1100.1)
4. The Enforcement Officer shall approve all plats, replats and
PUDs to assure that the development plans are consistent
with this Ordinance [NFIP /IDOT -DWR Section 1100.1.)
D. Whenever an Enforcement Officer finds a violation of this
Ordinance, or of any permit or order issued pursuant thereto,
within their respective jurisdiction, the Enforcement Officer may
issue a stop work order on all development activity on the subject
property or on the portion of the activity in direct violation of
the Ordinance. In every case, the Enforcement Officer shall issue
an order which (1) describes the violation (2) specifies the time
period for remediation and (3) requires compliance with the
Ordinance prior to the completion of the activity in violation.
E. Adopted Basin Plans will be the basis for more specific
regulations, if necessary and appropriate. These additional or
more specific regulations will apply only in the specific study
area of the Basic Plan and supersede those of the Ordinance.
F. Among the causes for terminating a permit during its term or for
denying a permit extension include, but are not limited to the
following:
1. Noncompliance with any condition of the permit, or
-2- September 1991
PUBLIC HEARING DRAFT
Lake County Watershed Development Ordinance
September 1991
INTRODUCTION
This Ordinance sets forth the minimum requirements for the stormwater
management aspects of development in Lake County. The Lake County Stormwater
Management Commission is the corporate enforcement authority for the
Ordinance. Illinois Revised Statutes Chapter 34, Section 5 -1062 states, "The
purpose of this Section is to allow management and mitigation of the effects
of urbanization on stormwater drainage... by consolidating the existing
stormwater management framework into a united, countywide structure ." The
Lake County Comprehensive Stormwater Management Plan, adopted by Ordinance on
June 11, 1990 states, "... that the regulations be uniformly and consistently
enforced throughout the County by all agencies." The Lake County Stormwater
Management Commission has determined that uniform and consistent enforcement
will be enhanced by municipalities adopting the standards of the Watershed
Development Ordinance. Individual municipalities may have additional or more
stringent requirements. In those instances where the requirements of this
Ordinance are not stipulated in a municipal ordinance or do not meet the
minimum requirements herein, this Ordinance shall prevail.
ARTICLE I: PURPOSE
The purpose of this ordinance is to establish reasonable rules and regulations
for development in order to:
A. Minimize harm due to periodic flooding including loss of life and
property and threats and inconveniences to public health, safety
and welfare; and
B. Assure that new development does not increase flood and drainage
hazards to others, or create unstable conditions susceptible to
erosion; and
C. Lessen the financial burden on the taxpayer for flood control
projects, repairs to flood damaged public facilities and
utilities, and for flood rescue and relief operations; and
D. Protect, conserve and promote the orderly development of land and
water resources; and
E. Protect buildings and improvements to buildings from flood damage
to the greatest extent possible; and
F. Conserve the natural hydrologic, hydraulic, water quality and
other beneficial functions of watercourses, floodplains and
wetlands; and
G. Prevent disruption of the economy and governmental services due to
stormwater and flood drainage; and
H. Maintain eligibility for the County and its municipalities in the
National Flood Insurance Program by equalling or exceeding its
requirements and thus make federally subsidized flood insurance
available at reduced rates.
no
D
ARTICLE III: COMMUNITY CERTIFICATION
4. The SMC shall approve the petition as submitted, shall
approve the petition with conditions or shall deny the
petition. A notice of the SMC action shall be submitted to
the petitioning community.
5. Certified Communities shall petition for recertification
every three (3) years. Communities with Provisional
Certification shall petition for Certification as stipulated
in the interagency agreement but no later than three (3)
years from receiving Provisional Certification.
6. Within the three (3) year certification period, the SMC
Director may periodically review the community's Ordinance
enforcement records and performance and make remedial
recommendations to the community, if necessary. Review
findings will be used in the assessment of petitions for
recertification from Certified Communities and petitions for
Certification from communities with Provisional
Certification.
ARTICLE IV: WATERSHED DEVELOPMENT PERMITS
A. GENERAL
1. Regulated Development
No person, firm, corporation or governmental agency, unless
specifically exempted shall commence any development
regulated by this Ordinance on any lot or parcel of land
without first obtaining a Watershed Development Permit from
the Stormwater Management Commission or, if applicable, the
certified community. No permit shall be issued if the
proposed development fails to meet the requirements of this
Ordinance or its certified community equivalent. The
following activities are exempt:
a. Any development which does not require an Illinois
Department of Transportation- Division of Water
Resources permit, is not located in a Regulatory
Floodplain, does not disturb a cumulative total of one
(1) or more acres of wetlands, and does not occur in a
watercourse where the tributary drainage area is five
(5) or more acres; and will be in accordance with one
of the following conditions:
(1) Single family detached residential developments
with four (4) or fewer units, or
(2) Multi- family, non - residential, and other
developments of less than three (3) acres in
size; and which will result in an impervious
surface area of less than 50% of the development
site, or
(3) Any public road construction project resulting
in less than one (1) acre of additional
impervious surface.
-4- September 1991
ARTICLE II: ORDINANCE ENFORCEMENT
2. The permittee's failure to disclose fully all relevant facts
in the application process or the permittee's
misrepresentation of any relevant facts at any time, or
3. If the authorized work is not commenced within twelve months
after issuance of the permit or, if the authorized work is
suspended or abandoned, for a period of six months after the
time of commencing the work, unless an extension has been
granted in writing by the Enforcement Officer.
ARTICLE III: COMMUNITY CERTIFICATION
Upon certification, the community's designated Enforcement Officer shall
enforce all provisions of this Ordinance within the community's jurisdiction.
The criteria and process for certification follow:
A. CRITERIA
1. The community is participating in the regular phase of the
National Flood Insurance Program.
2. The community has adopted and is enforcing the provisions of
this Ordinance.
3. The community forwards appropriate portions of Floodway
Development applications to IDOT /DWR for concurrent review
and approval.
4. The community maintains records and provides SMC with
certain portions of these records as described in Article
VII (Stormwater Records).
5. A community which will not have sufficient capacity to
implement all provisions of this Ordinance by the effective
date of this Ordinance, but intends to develop full capacity
(with SMC support) within a reasonable period of time, may
petition the SMC for Provisional Certification. After an
interagency agreement is approved, Provisional Certification
will be issued. The interagency agreement will define the
partial level of Ordinance implementation by the community,
the process of interaction between the community and the SMC
and the timetable for staff capacity development for full
Ordinance implementation.
B. PROCESS
1. Communities desiring certification shall submit a letter of
intent to petition for Certification or Provisional
Certification to the SMC.
2. A petition for Certification or Provisional Certification
shall be submitted to the SMC within of a
letter of intent.
3. Within 60 days of receipt of the petition and in conjunction
with a regularly scheduled SMC meeting, a public hearin
shall be held and the staff recommendation shall be
presented.
-3- September 1991
B.
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
that has contiguous lots or parcels of lands owned by the
same property owner, then the criteria as defined in this
section will be applied to the total land area compiled from
aggregate ownership parcels. If this aggregate ownership
land area is greater than the minimum area requirements
defined in Article IV Section A.1, then a Watershed
Development Permit will be required.
ALL DEVELOPMENT
The following performance standards, application requirements and
other provisions apply to all development requiring a permit.
Subsequent sections include additional provisions for development
in a floodplain, floodway and /or disturbs wetlands.
1. Performance Standards
a. Runoff Calculations
(1) For areas 100 acres or greater, and for the
determination of detention storage requirements,
an SMC approved hydrograph - producing runoff
calculation method shall be used.
(2) The Rational Method may be used to calculate
discharges for areas of less than 100 acres.
The Rational Method shall not be used to
determine detention storage requirements.
(3) Bulletin 70 (Table 13), prepared by the Illinois
State Water Survey shall be used in determining
design rainfall.
(4) Runoff calculations for all undeveloped
tributary land shall be based on anticipated
future land use or existing conditions whichever
yields the greater runoff. Calculations shall
be based on existing storage facilities only
unless approved by the SMC.
b. Release Rates and Discharges
(1) Unless otherwise specified in an SMC- adopted
Basin Plan, release rates shall not exceed 0.04
cubic feet per second per acre for the 2 -year,
24 -hour storm event nor 0.15 cubic feet per
second per acre for the 100 -year, 24 -hour storm
event.
(2) All concentrated stormwater discharges leaving a
site must be conveyed into a well- defined
receiving channel with adequate downstream
stormwater capacity.
(3) All areas of the development must be provided an
overland flow path that will pass the 100 -year
flow without damage to structures or property.
(4) The design of stormwater drainage systems shall
not result in the interbasin transfer of
drainage, unless no reasonable alternative
exists and there is no legal restraint
preventing such transfer.
Q-m
September 1991
0
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
b. Any development which prior to the effective date of
the Ordinance has obtained:
(1) An approved building permit, or
(2) From an appropriate municipality or from Lake
County, an approved preliminary plat, which
includes a preliminary engineering study
consistent with ordinances then enforced by the
appropriate municipality or Lake County.
2. Development Classification
All activities requiring a Watershed Development Permit
shall be classified as a minor, major, or roadway
construction developments. The definition for each
classification follows:
a. A minor development is defined as any development
which does not require an Illinois Department of
Transportation- Division of Water resources permit, is
not located in a Regulatory Floodplain, does not
disturb a cumulative total of one (1) or more acres of
wetlands, and does not occur in a watercourse where
the tributary drainage area is five (5) or more acres;
and will be in accordance with one of the following
conditions:
(1) Single family detached residential development
of less than five (5) acres, or
(2) Single family detached residential development
of five (5) acres or more with a gross density
of less than .5 unit per acre, and an impervious
cover area of less than fifteen (15) percent, or
(3) Multi- family, non - residential and other
developments of less than three (3) acres
requiring a Watershed Development Permit.
b. A public road development is defined as any road
construction project which takes place in a highway
right -of -way or part thereof that is administered by a
local authority under its respective highway
jurisdiction.
C. A major development is defined as all other
development.
3. Permit Fees
A schedule of fees in accordance with the provisions of this
ordinance shall be established by separate resolution of the
SMC. A separate fee schedule shall be developed and
implemented by certified communities.
4. Contiguous Property
In order to preclude inappropriate phasing of developments
to circumvent the intent of this Ordinance, when a proposed
development activity will occur on a lot or parcel of land
-5- September 1991
ARTICLE IVs STORMWATER MANAGEMENT PERMITS
SMC Master Plan or the SMC determines that
such an exemption will-not result in
negative impacts to the drainage system.
e. Detention Facilities
(1) All stormwater infiltration, retention and
detention facilities shall be provided with an
overflow structure capable of passing the 100 -
year inflow rate.
(2) Single pipe outlets shall have a minimum inside
diameter of 12 inches. If design release rates
call for smaller outlets, structures such as
perforated risers, or flow control orifices
shall be used.
(3) Detention facilities side - slopes shall be no
steeper than 3H:1V.
(4) Stormwater infiltration, retention and detention
facilities required to meet a development's
discharge requirements shall be designed to by-
pass tributary flow unless approved by the SMC
or the certified community.
(5) Any work involving the construction,
modification or removal of a dam as defined in
Article II per 92 III. Adm. Code 702 (Rules for
Construction of Dams) shall obtain an Illinois
Division of Water Safety permit prior to the
start of construction of a dam.
f. Storm Sewer
(1) The 10 -year design storm shall be used as a
minimum for the design of storm sewers and
appurtenances.
(2) Connections to sanitary sewers or existing
agricultural drainage systems (tiles) will not
be permitted for new developments. Field tile
systems disturbed during the process of land
development must be reconnected by those
responsible for their disturbance unless the
approved drainage plan includes provisions for
these.
(3) All storm sewers shall be located in a public
road right -of -way or maintenance easement of
sufficient size to maintain or re- construct the
sewer.
(4) Within the parcel being developed, an overflow
easement shall be provided which conveys the
portion of the 100 -year runoff not carried in a
storm sewer.
g. Streams and Channels
(1) Natural streams and channels are to be conserved
to the greatest extent possible.
(2) If channel modification occurs, the physical
characteristics of the modified channel shall
-8- September 1991
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
C. Runoff Volume Reduction Hierarchy
(1) An applicant shall choose a strategy to meet the
release rate requirements which minimizes the
increase in runoff volumes and rates from the
development. The applicant shall use the
following hierarchy in preparing a drainage
plan: 1) Preservation of floodplains and wetland
areas; 2) Minimization of impervious surfaces to
be created on the property; 3) Flow attenuation
by use of open vegetated swales and retention of
existing natural stream channels; 4)
Infiltration of runoff onsite; 5) Stormwater
retention structures; 6) Wet detention
structures; 7) Dry detention structures; 8)
Storm sewers.
d. Fee -in -Lieu of On -Site Detention
(1) The SMC may require, or the applicant may
request, the payment of a fee -in -lieu of on -site
detention to fulfill all or part of the on -site
detention requirement for a development. The
SMC will request a fee -in -lieu of on -site
detention or will reject its use at the pre -
application meeting unless additional
engineering studies are required.
(2) The SMC may reject any request to use a fee -in-
lieu of on -site detention by the applicant which
the SMC determines does not benefit the drainage
system.
(3) Fee -in -lieu of on -site detention shall be the
lesser of: 1) the fee computed for each acre
foot of storage exempted in accordance with the
procedures and schedules defined in the
Technical Reference Manual or 2) the estimated
cost, as verified by SMC of the applicant's
proposed and approved on -site detention,
including land costs had the SMC allowed its
construction.
(4) A fund will be maintained for each watershed for
the purpose of identifying and controlling all
revenues and expenses derived from stormwater
drainage services resulting from fee -in -lieu of
on -site detention exemptions. All fees -in -lieu
of on -site detention received from each
watershed shall be deposited in these funds.
Disbursements for costs to mitigate stormwater
impacts of developments shall be made from the
appropriate watershed fund.
(5) Criteria
The following requirements must be met before a
fee -in -lieu of on -site detention will be
utilized:
(a) ' The downstream drainage system has
adequate stormwater capacity; and
(b) The elimination of on -site detention
facilities is consistent with an approved
-7- September 1991
1-1
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
(i) Linear waterways with an ordinary
high water mark between the banks of
greater than 20 feet shall have a
minimum buffer width of 30 feet on
each side of the waterway.
(ii) Linear waterways with an ordinary
high water mark between the banks of
less than 20 feet shall have a
minimum buffer width of 20 feet on
each side of the waterway.
(b) Water body buffers encompass all non-
linear bodies of water and include
wetlands, lakes and ponds.
(i) For all water bodies with a surface
area greater than one (1) acre, a
minimum buffer width of 30 feet,
extending from the delineated water
body boundary, shall be established.
(ii) For all water bodies with a surface
area less than or equal to one (1)
acre, a minimum buffer width shall
be established such that the area of
the buffer is one -half (1/2) the
area of the water body, to a minimum
width of 10 feet.
(2) Buffer areas shall be made up of native
vegetation. The use of native riparian
vegetation is preferred in the buffer strip.
(3) The boundary of the buffer area for lakes, ponds
and streams shall be determined by reference to
the water body's ordinary high water mark. For
wetlands the boundary of the buffer area shall
be determined by the wetland delineation report.
A property may contain a buffer area which
originates from a water body on another
property.
(4) Constructed stormwater management features may
not be located such that the required boundaries
of buffer areas extend into adjoining property
or the ultimate boundaries of public right-of-
way as determined by the local road authority.
(5) If an existing buffer area is disturbed during
the construction, a vegetated buffer strip shall
be established upon completion of construction.
(6) Access through buffer areas shall be provided,
when necessary, for water body or waterway
maintenance purposes.
(7) Roadside drainage ditches, swales draining five
acres or less, and detention facilities are
exempt from buffer requirements.
(8) Where practical, stormwater shall discharge into
a buffer area in place of directly into a water
body. Such discharges shall enter the buffer as
unconcentrated flow with appropriate energy
-10- September 1991
97M
ARTICLE IVt STORMWATER MANAGEMENT PERMITS
meet existing channel in length, cross- section,
slope and sinuosity to the greatest extent
possible.
(3) All on -site stormwater conveyance channels
should be designed and constructed to withstand
the expected velocity of flow from a 10 -year
frequency storm without erosion. Stabilization
adequate to prevent erosion shall' be provided at
the inlets and outlets for all pipes transitions
and paved channels.
(4) Removal of streamside (riparian) vegetation
shall be limited to one side of the channel,
where possible.
(5) Clearing of channel vegetation shall be limited
to that which is essential for construction of
the channel.
(6) Channel banks shall be constructed with a side
slope no steeper than 3H:1V.
(7) All disturbed areas associated with a channel
modification shall be seeded or otherwise
stabilized immediately upon completion of site
grading construction.
(8) If channels are modified an effective means to
reduce sedimentation and degradation of
downstream water quality must be installed
before excavation begins.
(9) New or relocated channels shall be built in the
dry and all items of construction, including
vegetation, shall be completed prior to
diversion of water into the new channel.
(10) A minimum maintenance easement of 12 feet is
required along one side of all channels draining
5 or more acres. Channels greater than 20 feet
in width require a 12 foot easement along both
banks. All drainage easements shall be
accessible to vehicular equipment; however,
linear accessibility for vehicular equipment is
not required.
h. Lakes, Ponds and Wetlands
(1) All direct discharges of stormwater into
wetlands or existing lakes and ponds due to new
development shall be required to divert and
retain the initial one -half inch of runoff
immediately before the outlet.
i. Buffer Areas
(1) Buffer areas are divided into two types; linear
buffers and water body buffers.
(a) Linear buffers are located along all
linear watercourse and include channels,
creeks, streams and rivers.
-9- September 1991
a
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
disturbance of the channel. Permanent or
temporary vegetation shall not be
considered established until sufficient
ground cover is achieved which is mature
enough to control erosion.
(e) Disturbed areas draining less than 1 acre,
shall be protected by a filter barriers
(including filter fences, straw bales, or
equivalent control measures) to control
all off -site runoff. Vegetated filter
strips, with a minimum width of 25 feet,
may be used as an alternative only where
runoff in sheet flow is expected.
Disturbed areas draining more than 1 but
less than 5 acres, shall be protected by a
sediment trap or equivalent control
measure at a point downslope of the
disturbed area.
Disturbed areas draining more than 5
acres, shall be protected by a sediment
basin or equivalent control measure at a
point downslope of the disturbed area.
(f) When development activity is to take place
in streams or channels, construction
vehicles shall be kept out of the
watercourses to the maximum extent
possible.
Construction vehicles shall cross flowing
streams by the means of bridges or
culverts except when such methods are not
feasible. Where an existing crossing is
not available, a temporary crossing shall
be constructed.
(g) All storm sewer facilities which are or
will be functioning during construction
shall be protected, filtered, or otherwise
treated to remove sediment.
(h) If dewatering services are used, adjacent
properties shall be protected. Discharges
shall enter an effective sediment and
erosion control measure.
(i) All temporary erosion and sediment control
measures shall be removed within 30 days
after final site stabilization is achieved
or after the temporary measures are no
longer needed. Trapped sediment and other
disturbed soil areas should be permanently
stabilized.
(j) A stabilized mat of aggregate underlain
with filter cloth shall be located at any
point where traffic will be entering or
leaving a construction site to or from a
public right -of -way, street, alley or
parking area.
-12- September 1991
9
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
dissipation measures to prevent excessive
erosion and scour.
(9) All buffer areas shall be maintained free from
development including disturbance of the soil,
dumping or filling, erection of structures and
placement of impervious surfaces except as
follows:
(a) A buffer area may be used for passive
recreation (e.g., birdwatching, walking,
jogging, bicycling, horseback riding and
picnicking) and it may contain pedestrian,
bicycle or equestrian trails, provided
that the created path is no wider than ten
(10) feet. If the path leads to a
wetland, it must be a winding path.
(b) Structures and impervious surfaces may
occupy a maximum of 20 percent of the
required buffer area provided the runoff
from such facilities is diverted away from
the water body or such runoff is directed
to enter the buffer area as unconcentrated
flow.
(c) Utility maintenance and maintenance of
drainage facilities and drainage easements
shall be permitted.
(d) Anchoring and placement of boat docks and
piers.
j. Soil Erosion and Sediment Control
(1) Soil erosion and sediment control related
measures are required for any land disturbance
activity permitted under Article IV A. The
following requirements shall be met:
(a) Soil disturbance shall be conducted in
such a manner as to minimize erosion.
Soils stabilization measures shall
consider the time of year, site conditions
and the use of temporary or permanent
measures.
(b) Properties and waterways located
downstream from development sites shall be
protected from erosion and sedimentation.
At points where concentrated flow leaves a
site, stable downstream facilities are
required.
(c) Soil erosion and sediment control features
shall be constructed prior to the
commencement of upland disturbance.
(d) Permanent or temporary soil stabilization
shall be applied to disturbed areas within
15 calendar days of the end of the active
disturbance of the soil. Permanent soil
stabilization measures shall be applied to
channels (including bed and banks) Oithin
15 calendar days of the end of primary
-11- September 1991
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ARTICLE IV: STORMWATER MANAGEMENT PERMITS
existing and proposed elevations, normal water
and calculated high water elevations.
(4) A vicinity map shall be included along with the
parcel identification numbers of all parcels
comprising the proposed development.
(5) A report describing the hydrologic and hydraulic
analyses performed for the project. The report
shall include the name of stream or body of
water affected, a statement of purpose of
proposed activity, anticipated dates of
initiation and completion of activity, a
detailed determination of the runoff for the
project site under existing and developed
conditions. This includes documentation of the
design volumes and rates of the proposed runoff
for each portion of the watershed tributary to
the drainage system and the effects the improve-
ments will have upon the receiving channel and
high water elevations. Runoff calculations shall
include all discharges entering the site from
upstream areas.
(6) A report describing how the Runoff Volume
Reduction Hierarchy (as described in Article IV
B.l.c.) was used in evaluating the stormwater
management needs of the site.
(7) For detention facilities, a report which
includes a plot or tabulation of storage volumes
and water surface areas with corresponding water
surface elevations, stage - discharge or outlet
rating curves, and design hydrographs of inflow
and outflow for the 2 -year, 24 -hour and the 100 -
year, 24 -hour storm events under existing and
developed conditions.
(8) A Soil Erosion and Sedimentation Control Plan
for all disturbed areas which includes:
(a) A site map prepared at the same scale as
the drainage plan that identifies both
temporary and permanent vegetative and
structural erosion and sediment control
measures to be implemented.
(b) A narrative description of the sequencing
of grading and soil disturbance and
construction activities, the temporary and
permanent sediment and erosion control
measures to be implemented to mitigate any
negative effects of grading including:
supporting calculations; estimated
schedule for installing, maintaining and
removing both temporary and permanent
structures; and the final stabilization
and revegetation measures.
(9) A Maintenance Plan for the ongoing maintenance
of all drainage system components including
wetlands is required prior to plan approval. The
plan shall include:
-14- September 1991
2.
ARTICLE IVs STORMWATER MANAGEMENT PERMITS
(2) Maintenance
All temporary measures and permanent erosion and
sediment control must be continuously maintained
in an effective working condition.
Application Requirements
a. Application Requirements for Minor Developments
(1) Name and legal address of the applicant.
(2) Common address and legal description of the site
and the parcel identification number where the
development will take place.
(3) A general description of the existing and
proposed drainage system including all discharge
points, collection, conveyance, and storage
facilities.
(4) A grading plan showing proposed and existing
contours.
(5) A site drainage plan locating drainage features,
-13-
September 1991
stormwater management facilities, floodplains
and wetlands boundaries.
(6)
An area drainage plan locating the proposed
development in the watershed.
(7)
A description and depiction of measures to be
taken to control erosion.
b. Application Requirements for Major Developments
(1)
Name and legal address of the applicant, and
common address of the location where the
development will take place, mailing address of
the property owner and the applicant or
applicant's agent's signature.
(2)
A topographic map of the existing conditions of
the development site showing the location of all
roads, all drainageways, the boundaries of
predominate soil types, the boundaries of
predominate vegetation, and the location of any
drainage easements, detention or retention
basins, including their inflow and outflow
structures, if any. The map shall also include
the location, size and flowline elevations of
all existing storm or combined sewers and other
utility lines within the site. The map shall be
prepared using a minimum 2 -foot contour interval
and shall be prepared at an appropriate scale
for the type of project and shall include
specifications and dimensions of any proposed
channel modifications, location and orientation
of cross- sections, if any, north arrow, and a
graphic or numerical scale;
(3)
Include cross - section views for the drainage
system showing existing and proposed conditions
including principal dimensions of the work, and
-13-
September 1991
2.
LM-1
I I
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
(2) For a non-riverine floodplain, the historic
Flood of Record plus three feet may be used for
the BFE instead of a study.
C. Nothing contained herein shall prohibit the
application of these regulations to land which can be
demonstrated by engineering survey to lie within any
floodplain. Conversely, any lands which can be
demonstrated, to the satisfaction of the Enforcement
Officer, by an engineering study certified by a
registered professional engineer to lie beyond the
floodplain shall not be subject to the regulations of
this section. However, until a Letter of Map
Amendment (LOMB) is received, the site will be
considered in the floodplain for flood insurance
purposes. Only IDOT /DWR or FEMA can determine if
lands lie beyond the floodway.
Performance Standards Applicable to all Floodplain
Development
The standards of this section apply to all floodplain
development except when superseded by more stringent
requirements in the subsequent sections.
a. Modification and disturbance of natural riverine
floodplains shall be avoided to the greatest extent
practicable to protect existing hydrologic and
environmental functions. Such disturbances shall be
minimized and all negative impacts mitigated.
b. If development results in a change in the mapped
regulatory floodplain or 100 -year frequency flood
elevation on a site, the applicant shall submit
sufficient data to obtain a Letter of Map Revision
(LOMR) from FEMA.
C. No development in the floodplain shall create a
damaging or potentially damaging increase in flood
heights or velocity or threat to public health, safety
and welfare or impair the natural hydrologic functions
of the floodplain or channel.
d. For all projects involving channel modification, fill,
or levees, the flood carrying capacity of the
watercourse shall be maintained. In addition, the
Enforcement Officer shall notify adjacent communities
in writing 30 days prior to the issuance of a permit
for the modification or relocation of the watercourse.
The SMC may be used as a forum for resolving
interjurisdictional issues.
e. For all structures placed on fill, the lowest floor,
(including basement) shall be two feet or above the
base flood elevation.
f. Only a nonresidential building may be structurally dry
floodproofed (in lieu of elevation) provided that a
registered professional engineer shall certify that
the building has been structurally dry floodproofed
below the flood protection elevation, the structure
and attendant utility facilities are watertight and
capable of resisting the effects of the base flood or
100 -year frequency flood. The building design shall
take into account flood velocities, duration, rate of
-16- September 1991
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
(a) Maintenance tasks.
(b) The party responsible for performing the
maintenance tasks.
(c) A description of all permanent public or
private access maintenance easements.
(d) A description of dedicated sources of
funding for the required maintenance.
(10) When a proposed development has the potential
for impacting a drainage system component
maintained by an active Drainage District, a
copy of the detailed drainage plan shall be
forwarded to the Drainage District for
concurrent review to allow the Drainage District
the opportunity for input prior to the permit
decision being made.
(11) The Application shall be certified to be in
substantial conformance to this Ordinance and
the Lake County Stormwater Management Technical
Reference Manual and sealed by a professional
engineer licensed to practice in the State of
Illinois.
C. FLOODPLAIN DEVELOPMENTS
1. General Information
a. The area constituting the floodplain, including
floodways, flood fringe and non - riverine floodplains,
shall be determined from the BFE in the following maps
and studies in the order indicated below. Appendix B
contains a listing of IDOT /DWR designated regulatory
floodway maps.
(1) Floodplain mapping and studies of an SMC adopted
and IDOT /DWR and FEMA approved Basin Plan;
(2) IDOT /DWR, Regulatory Floodplain and Flood
Profile maps;
(3) "Flood Insurance Studies for Lake County,
Illinois and its Municipalities ", published by
the Federal Emergency Management Agency,
including the Flood Boundary and Floodway Maps
and the Flood Insurance Rate maps;
(4) The best available information as determined by
the SMC.
b. When no base flood or 100 -year frequency flood
elevation information exists, the base flood or 100 -
year frequency flood elevation shall be determined by
the registered professional engineer using an
appropriate model or technique as described in the
Technical Reference Manual.
(1) Along any watercourses draining more than one
(1) square mile, the above analyses shall be
submitted to IDOT /DWR for approval.
-15-' September 1991
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ARTICLE IV: STORMWATER MANAGEMENT PERMITS
C. Before any development is permitted it must be
demonstrated that:
(1) The alteration of the natural floodplain has
been minimized to the greatest extent
practicable. _
(2) The proposal is to allow for reasonable use of
the land to avoid a hardship on the property
owner and not solely for the convenience of the
owner to increase the density or intensity of
use.
(3) The granting of the permit shall be in harmony
with the spirit and intent of this Ordinance and
the Lake County Comprehensive Stormwater
Management Plan and will not be detrimental to
the effective and safe management of stormwater.
(4) The development cannot be reasonably located
outside the floodplain and the situation is not
self- created.
d. A residential or non - residential building that is
elevated by means of walls, pilings, or other
foundation must be permanently open to flood waters
and not subject to damage by hydrostatic pressures of
the base flood or 100 -year frequency flood. The
permanent openings shall be no more than one foot
above grade, and consists of a minimum of two
openings. The openings must have a total net area of
not less than one square inch for every one square
foot of enclosed area subject to flooding below the
BFE. The foundation and supporting members shall be
anchored and aligned in relation to flood flows and
adjoining structures so as to minimize exposure to
known hydrodynamic forces such as current, waves, ice
and floating debris.
4. Additional Performance Standards for the Floodway (IDOT /DWR
Regulations)
If the development is proposed for the floodway portion of
the Regulatory Floodplain the following additional standards
apply:
a. Only the following appropriate uses will be allowed in
the floodway:
(1) Public flood control structures and private
improvements relating to the control of drainage
and flooding or existing structures, erosion,
water quality or habitat for fish and wildlife;
(2) Structures or facilities relating to
functionally water dependent uses;
(3) Storm and sanitary sewer outfalls;
(4) Underground and overhead utilities if
sufficiently flood - proofed;
(5) Recreational facilities such as playing fields
and trail systems including any related fencing
(at least 50% open when viewed from any one
-18- September 1991
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
rise, hydrostatic and hydrodynamic forces, the effects
of buoyancy, and impacts from debris or ice.
Floodproofing measures shall be operable without human
intervention and without an outside source of
electricity (Levees, berms, floodwalls and similar
works are not considered floodproofing for the purpose
of this subsection).
g. Hydraulically equivalent compensatory storage is
required for fill or structures and shall be at least
equal to the volume of floodplain storage lost.
h. New and replacement water supply systems, wells, and
sanitary sewer lines may be permitted providing all
manholes or other above ground openings located below
the Flood Protection Elevation (FPE) are watertight.
i. All areas below the flood protection elevation shall
be constructed of materials resistant to flood damage.
The lowest floor (including basement) and all
electrical, heating, ventilating, plumbing, and air
conditioning equipment and utility meters shall be
located at or above the FPE.
j. No developments in the floodplain shall include
locating or storing chemicals, explosives, buoyant
materials, animal wastes, fertilizers, flammable
liquids, pollutants, or other hazardous or toxic
materials below the FPE.
k. Manufactured homes and travel trailers to be installed
on a site for more than 180 days, shall be elevated to
or above the flood protection elevation; and shall be
anchored to resist flotation, collapse, or lateral
movement by being tied down in accordance with the
Rules and Regulations for the Illinois Mobile Home
Tie -Down Act issued pursuant to 77 Ill. Adm. Code 970.
1. All new buildings, building alteration that either ,
increases the first floor area by more than 20% or the
building's market value by more than 50 %, the
installation of a manufacturing home on a new site or
a new manufactured home on an existing site or
installing a travel trailer on a site for more than
180 days and located within a 100 -year floodplain
shall be protected from flood damage below the flood
protection elevation.
3. Additional Performance Standards for the Flood Fringe
If the development is proposed for the flood fringe portion
of the Regulatory Floodplain the following additional
standards apply:
a. Any rise in the base flood shall be confined to the
development site.
b. Hydraulically equivalent compensatory storage
requirements for fill or structures shall be at least
equal to 1.2 times the volume of floodplain storage
lost. Such compensation areas shall be constructed to
drain freely and openly to the watercourse and located
opposite or adjacent to filled areas.
-17- September 1991
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ARTICLE IV: STORMWATER MANAGEMENT PERMITS
(2) All effective regulatory floodway conveyance
lost due to the' development of Appropriate Uses,
other than bridge or culvert crossings, on-
stream structures or dams, shall be replaced for
all flood events up to and including the 100 -
year frequency flood.
(3) Transition sections shall be provided and used
in calculations of effective regulatory floodway
conveyance. The following expansion and
contraction ratios shall be used:
(a) Water will expand no faster than at a rate
of one foot horizontal for every four feet
of the flooded stream's length.
(b) Water will contract no faster than at a
rate of one foot horizontal for every one
foot of the flooded stream's length.
(c) Water will not expand or contract faster
than one foot vertical for every ten feet
of flooded stream length.
(d) Erosion /scour protection shall be provided
on land upstream and downstream of the
transition sections.
(4) The development of all Appropriate Uses shall
not result in an increase in the average channel
or regulatory floodway velocities or stage, for
all flood events up to and including the 100 -
year frequency event.
(5) A permit or letter indicating a permit is not
required must be obtained from IDOT /DWR, Dam
Safety Section for a Dam Safety permit or waiver
for any structure built for the purpose of
backing up water in the stream during normal or
flood flow.
(6) If the appropriate use will result in a change
in the floodway location or BFE, the applicant
shall submit sufficient information to be issued
a conditional regulatory floodway map revision
from IDOT /DWR and FEMA. No filling, grading,
dredging or excavating shall take place until a
conditional approval is issued. No further
development activities shall take place until a
final Letter of Map Revision (LOMR) is issued by
FEMA.
e. For those circumstances listed below located in a
regulatory floodway, the following criteria shall also
be submitted to IDOT /DWR for its concurrent review and
approval prior to the issuance of a permit:
(1) Analysis of the flood profile due to a proposed
bridge.
(2) An engineer's determination that an existing
bridge or culvert crossing is not a source of
flood damage and the analysis indicating the
proposed flood profile.
-20- September 1991
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
direction) built parallel to the direction of
flood flows, and including open air pavilions;
(6) Detached garages, storage sheds, or other
nonhabitable structures without toilet
facilities, accessory to existing buildings.
(7) Bridges, culverts and associated roadways,
sidewalks, and railways, necessary for crossing
over the floodway or for providing access to
other appropriate uses in the floodway and any
modification thereto;
(8) Parking lots and any modifications thereto
(where the existing depth of flooding for the
BFE is less than one foot) and aircraft parking
aprons built at or below ground elevation;
(9) Floodway regrading, without fill, to create a
positive non - erosive slope toward a watercourse.
(10) Floodproofing activities to protect previously
existing lawful structures including the
construction of water tight window wells,
elevating structures, or the construction of
flood walls around residential, commercial or
industrial principal structures where the
outside toe of the floodwall shall be no more
than ten (10) feet away from the exterior wall
of the existing structure, and, which are not
considered to be substantial improvements to the
structure.
(11) In case of damaged or replacement buildings,
reconstruction or repairs made to a building
that are valued at less than 50% of the market
value of the building before it was damaged or
replaced, and which do not increase the outside
dimensions of the building.
(12) Additions to existing buildings above the BFE
that do not increase the building's foot print
and are valued at less than 50% of the market
value of the building.
b. Exceptions to the list of appropriate uses are not
allowed within the floodway.
C. All appropriate uses shall require a Permit from the
SMC or Certified Community and must be in accordance
with all provisions of this Ordinance.
d. Construction of an Appropriate Use will be considered
permissible provided that the proposed project meets
the following engineering and mitigation criteria and
is so stated in writing with supporting plans,
calculations and data by a registered professional
engineer.
(1) No development shall be allowed (including fill)
which will cause a rise in the base flood
elevation singularly or cumulatively and which
will create a damaging or potentially damaging
increase in flood heights or velocity.
-19- September 1991
0 Q
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
f. The hydraulic analysis for the backwater caused by the
bridge showing the existing condition and proposed
regulatory profile must be submitted to IDOT /DWR for
concurrence that a CLOMR is not required.
6. Additional Plan Submittal Requirements for Development in
the Riverine Floodplain
If the development is located in a riverine floodplain, the
applicant will need to provide the following additional
information:
a. Site location of the property, drawn to scale, on the
regulatory floodway map, indicating whether it is
proposed to be in an incorporated or unincorporated
area;
b. A plan view of the project showing:
(1) The regulatory floodway limit, floodplain limit.
(2) 10 -year frequency flood elevation, 100 -year
frequency flood elevation and graphic or
numerical scales (horizontal and vertical)
(3) A copy of the regulatory floodway map, marked to
reflect any proposed change in the regulatory
floodway location.
C. A listing of all local, state and federal permits or
approval letters that may be required for this type of
development.
d. Engineering calculations and supporting data shall be
submitted showing that the proposed work will meet the
performance standards of this Ordinance.
e. All changes in grade resulting from any proposed
excavation or filling, and floodplain and floodway
limits; the location and dimension of all buildings
and additions to buildings; and the elevation of the
lowest floor (including basement) of all proposed
buildings subject to the requirements of this
Ordinance.
f. Elevation certificates of the lowest floor (elevation
including basements) or the elevation to which a non-
residential building has been floodproofed using a
floodproofing certificate shall be required for all
buildings in the floodplain.
D. WETLAND PROVISIONS
The following provisions are required when one (1) or more
cumulative acres of wetland are impacted. All the following
standards and submittal requirements will be required unless
waived by the Enforcement Officer.
1. Wetland Performance Standards
a. The applicant shall delineate all wetland area
boundaries in accordance with the current federal
wetland determination methodology authorized under
Section 404 of the Clean Water Act.
-22- September 1991
ARTICLE IVs STORMWATER MANAGEMENT PERMITS
(3) Alternative transition sections and
hydraulically equivalent storage.
(4) IDOT /DWR will review and approve prior to the
start of construction any Department projects,
dams, etc. and all other state or federal
projects.
f. Within all riverine floodplains draining more than one
square mile where the floodway has not been
determined, the developer should have an engineering
study performed to determine a floodway and submit
that engineering study to IDOT /DWR for acceptance as a
regulatory floodway. Upon acceptance of their
floodway by the IDOT /DWR, the developer shall then
apply the Appropriate Use criteria and performance
standards for floodway development. The applicant may
limit the study to a floodplain determination and
apply the Appropriate Use criteria and performance
standards. Alternative to the study, a mapped
floodplain may be used as the floodway.
g. Non - conforming structures located in a regulatory
floodway may remain in use, but may not be enlarged,
replaced or structurally altered. A non - conforming
structure damaged by flood, fire, wind or other
natural or man -made disaster may be restored unless
the damage exceeds fifty percent (50 %) of its market
value before it was damaged, in which case it shall
conform to this Ordinance.
5. Special Considerations for the Construction of New Bridges
or Culvert Crossings and Roadway Approaches
a. The proposed structure shall not result in an increase
of upstream flood stages greater than 0.1 foot when
compared to the existing conditions for all flood
events up to and including the 100 -year frequency
event.
b. If the proposed construction will increase upstream
flood stages greater than 0.1 feet, the developer must
contact IDOT /DWR, Dam Safety Section for a Dam Safety
permit or waiver.
C. Lost floodway storage must be compensated for per the
flood fringe performance standards of this Ordinance
except that artificially created storage lost due to a
reduction in head loss behind a bridge shall not be
required to be replaced, provided no damage will be
incurred downstream.
d. Velocity increases must be mitigated per the floodway
performance section of this Ordinance except that in
the case of bridges or culverts or on stream
structures built for the purpose of backing up water
in the stream during normal or flood flows, velocities
may be increased at the structure site if scour,
erosion and sedimentation will be avoided by the use
of appropriate measures.
e. If the crossing is proposed over a public water that
is used for recreational or commercial navigation, a
Department of Transportation permit must be received.
-21- September 1991
0 @ ..
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
(c) Creation: Creation refers to the creation
of new wetlands on a non - wetland site.
(d) Contribution: Contribution refers to the
donation of land or money to an SMC
approved Wetland Mitigation Bank.
(4) Mitigation standards shall be determined in part
through the use of an acreage replacement ratio.
The minimum ratio shall be 1.0 acre mitigated to
every 1.0 acre lost. A higher ratio may be
required when the probability of success of
replacing the lost functions warrant it.
(5) All plants used in the mitigation shall be
native to Lake County.
(6) Performance standards shall be established
during the pre - application conference and
included in the mitigation plan. The permittee
shall successfully implement the approved
mitigation plan or component within the time
period required by the Enforcement Officer.
(7) Mitigation must be performed prior to or
concurrently with activities that will
permanently disturb wetlands.
e. Wetlands may be used for on -site stormwater detention
subject to the following:
(1) It must be demonstrated that the use of the
wetland for detention will maintain or improve
the wetlands beneficial functions.
(2) Existing depressional storage in wetlands shall
be maintained and the volume of detention
storage provided to meet the requirements of
this Ordinance shall be in addition to the
existing storage.
(3) No wetlands of exceptional functional value
shall be used for satisfying on -site detention
requirements.
f. Monitoring shall be utilized to insure the
establishment of the mitigation and that it meets the
standards of this Ordinance. In order to achieve this
criteria, the following standards shall be met:
(1) The permittee shall submit an annual monitoring
report for up to five years from the completion
of the construction of the mitigation project.
As part of the final report the permittee shall
provide information justifying that monitoring
is no longer required. The wetland
establishment /monitoring period shall be
determined by the Enforcement Officer.
(2) The permittee shall consider monitoring
requirements fulfilled upon submittal of the
final report and subsequent receipt of notice
from the Enforcement Officer. If the
Enforcement Officer fails to send notice to the
permittee within 60 days after receipt of the
-24- September 1991
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
b. A pre - application conference between the Enforcement
Officer and the applicant shall be held to discuss
proposed impacts, mitigation options and submittal
requirements.' Upon request by a Certified Community,
SMC will provide technical assistance at this
conference.
C. The following hierarchy will be observed by all
applicants to determine application requirements:
(1) The proposed project will avoid adverse impacts
to the greatest extent possible based on
consideration of hydrologic conditions, existing
topography, vegetation and human activity as it
relates to stormwater management.
Wetlands of exceptional functional value, as
designated in the USEPA Lake County Advanced
Wetland Identification Study (ADID), are
considered to be generally irreplaceable and
unmitigatable for the purposes of evaluating
permit applications.
(2) The proposed project will minimize the adverse
impacts to the greatest extent possible based on
consideration of hydrologic conditions, existing
topography, vegetation and human activity as it
relates to stormwater management.
(3) If there are wetland impacts, selection of the
appropriate mitigation option will be based on a
functional assessment provided by the applicant.
d. Mitigation is required for all permanent adverse
impact to wetlands that result despite attempts to
avoid and /or minimize. The following criteria shall
be met to offset the wetland impacts.
(1) The mitigation plan shall include all
appropriate measures to be carried out to
maintain or improve the functions of wetlands,
mitigate adverse environmental impacts, restore
vegetation, and land and water features, prevent
sedimentation and erosion, minimize the area of
wetland disturbance and ensure compliance with
other provisions of this Ordinance.
(2) The mitigation will occur on -site unless the
functional assessment indicates that the
functions can easily be reproduced off -site.
(3) Depending on the circumstances under which
wetlands are lost or disturbed, the Enforcement
Officer will determined which of the following
mitigation options is appropriate.
(a) Restoration: Restoration refers to
actions performed on a site that reverse
or remedy adverse impacts.
(b) Enhancement: Enhancement refers to
actions performed to improve the
functionality of an existing, degraded
wetland.
-23- September 1991
0 d
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
C. Wetland Mitigation Plan
A mitigation plan shall include all of the following
information:
(1) Names, addresses and telephone numbers of the
principals associated with implementation of the
mitigation plan.
(2) A description of the mitigation project,
including best management practices proposed as
fulfillment of the required replacement of lost
wetland acreage and functions. The description
shall include project location maps showing the
geographic relationship between the proposed
mitigation sites.
(3) Plan view scaled drawings which include
mitigation project locations, stockpile areas,
erosion and sediment control practices,
equipment and supply storage areas.
(4) A construction schedule which includes starting
and completion dates.
(5) Hydrologic analysis which includes normal and
100 -year surface elevations and estimated
seasonal water surface elevations.
(6) The scientific and common name of plant species
used in the mitigation plan along with their
planting location, spacing, propagule type,
commercial source of planting stock, planting
density, and planting method.
(7) The permittee shall provide the Enforcement
Officer with access to 'the mitigation site
during business hours.
d. Monitoring Plan
(1) In order to insure the establishment of the
wetland mitigation, the applicant shall provide
the Enforcement Officer with a monitoring plan
which;
(a) identifies the names, addresses, and phone
numbers of parties responsible for
management; and
(b) states the management techniques,
schedule, and funding mechanisms:
(2) An annual monitoring report shall include the
following information:
(a) A description of how the mitigation
project meets the mitigation standards.
(b) Photographs of the mitigation project.
(c) A description of any mid - course
corrections which have been taken or need
to be taken to implement the mitigation
plan to meet the mitigation standards.
-26- September 1991
9
ARTICLE IV: - STORMWATER MANAGEMENT PERMITS
final report, the monitoring requirements shall
be considered fulfilled.
(3) If at any time during the monitoring period,
inspections or data indicates mitigation efforts
are not succeeding, the Enforcement Officer may
require mid - course corrections which may include
re- vegetation, removal of invasive species,
and /or controlled burns.
g. The permittee shall provide mechanisms to insure the
long -term protection of the created, restored, or
enhanced wetlands. This may be achieved through
protection mechanisms including vegetative management,
deed restrictions, conservation easements, or deeding
the created, restored, or enhanced wetlands to an
organization or public agency capable of protecting
and maintaining the wetland.
h. The Enforcement Officer shall provide guidance to the
applicant on the contents and timing of the Mitigation
Plan and shall approve the plan prior to the Permit
being issued.
i. If a permit is required by the U.S. Army Corps of
Engineers, the permit application shall be provided to
the SMC for review and transmittal to the Corps.
2. WETLAND SUBMITTAL REQUIREMENTS
a. Wetland Determination Report
The applicant shall provide the following information
to the Enforcement Officer:
(1) A map showing the exact location of wetlands
within the development boundaries.
(2) An aerial photograph delineating wetland,
development and watershed boundaries.
(3) Army Corps of Engineers data sheets with
representative color photographs shall be
provided for each wetland.
(4) A written description of the wetland(s)
including a complete functional assessment.
b. Wetland Use
The applicant will provide documentation regarding the
following:
(1) Determination if the project is water dependent
and /or that no practicable alternatives to the
impacts exists.
(2) Minimization of unavoidable impacts to the
maximum extent possible.
(3) Selection and justification of an appropriate
mitigation option.
(4) Appropriate use of wetlands for detention.
-25- September 1991
C
0
the spirit, purpose and intention of this Ordinance where by
reason of unique and exceptional physical circumstances or
condition of a particular property, the literal enforcement of the
provisions of this Ordinance will result in an unreasonable
hardship.
1. In Certified Communities and for minor development and /or
application requirements the Certified Communities
Enforcement Officer shall administer the variance
provisions.
2. In non - Certified Communities and for major development
performance standards, the SMC Chief Engineer shall
administer the variance provisions.
3. Variances shall be granted only upon:
a. showing of good and sufficient cause, and
b. a determination that the variance is the minimum
necessary to afford relief, considering the flood
hazard and water quality, and
C. a finding that failure to grant the variance would
result in exceptional hardship to the applicant, and
d. a finding that the granting of a variance would not
result in increased flood heights, additional threats
to public safety, or extraordinary public expense, nor
create nuisances, cause fraud or victimization of the
public, nor conflict with existing local laws or
ordinances.
4. Upon consideration of the factors noted above and the intent
of the Ordinance, the Enforcement Officer may attach such
conditions to the granting of a variance deemed necessary to
further the purposes and objectives herein.
B. APPEALS:
1. Any person aggrieved by a decision of a Certified
Community's Enforcement Officer may request review thereof
by the Certified Community's board of elected officials.
2. Any person aggrieved by a variance decision of the SMC Chief
Engineer may request review thereof by the Director.
3. Any person aggrieved by a decision, requirement, ruling or
interpretation of this Ordinance by the Director may appeal
it to the SMC by written notice filed with the Director
within 10 days of the determination.
ARTICLE VI: INSPECTIONS AND ACCESS
Representative of the SMC or Certified Communities may enter upon any
land or water to inspect development activity.
-28- September 1991
o c
ARTICLE IV: STORMWATER MANAGEMENT PERMITS
e. Long -Term Maintenance
(1) The applicant shall provide documentation to the
Enforcement Officer regarding who will be
responsible for the long -term maintenance and
protection of the wetland(s). This
documentation shall include:
(a) The names, addresses, and phone numbers of
parties responsible for maintenance.
(b) Types of preservation mechanisms used such
as deed restrictions or conservation
easements.
(2) The drainage facility maintenance provisions
(Article IV, Section B.2.b.(10)) of the
Ordinance applies to restored, enhanced, or
created wetlands.
E. PUBLIC ROADWAY DEVELOPMENT PERMIT
1. Performance Standards
a. The SMC shall be responsible for the review and
enforcement of all Public Road Developments.
b. The performance standards of this Ordinance shall
apply to all Public Road Developments.
2. Submittal Requirements
a. A copy of any applicable Illinois Department of
Transportation - Division of Water Resources Permit
application.
b. A copy of any applicable Illinois Department of
Conservation /Illinois Department of Transportation
Agency Action Plan Wetland Permit application.
C. A copy of the proposed Stormwater Management System,
including the location and size of all existing and
proposed drainage improvements including plan,
section, and profile views of storm sewers, field
tiles, culverts, channels, and detention areas.
d. A copy of all calculations supporting the stormwater
management system.
e. A Soil Erosion and Sediment Control Plan.
f. A Wetland Determination Report and Mitigation Plan, if
applicable.
ARTICLE V: VARIANCES AND APPEALS
A. VARIANCES
The Enforcement Officer upon application, after hearing, and
subject to the process and standards which follow, may grant
variances to the provisions of this Ordinance as will not cause
detriment to the public good, safety or welfare nor be contrary to
-27- September 1991
0 0
ARTICLE X: SEPARABILITY
The provisions of this Ordinance shall be deemed separable and the
invalidity of any portion of this Ordinance shall not affect the
validity of the remainder.
ARTICLE XI: EFFECTIVE DATE
This ordinance shall take effect 120 days after adoption by the County
Board of Lake County, Illinois.
-30- September 1991
0
ARTICLE VII: STORMWATER RECORDS
The adopted Lake County Comprehensive Stormwater Management Plan states
the SMC should "maintain a repository of stormwater management data for
the county." Toward that end, the Enforcement Officer shall:
A. Maintain records of every Watershed Development Permit
application, permit, variance, hydrologic and hydraulic data and
enforcement action as well as "as- built" plans if available, for a
period of at least 5 years from the date of permit issuance and
shall allow periodic inspections of the records by SMC personnel.
B. Maintain a jurisdiction map which displays the development
location and file reference number of every permit.
C. Provide to SMC staff a copy of each variance granted, elevation or
flood proofing certificate issued and other permit related
materials upon reasonable request by SMC staff.
D. Transfer to SMC, at agreed upon intervals, but no later than the
5 -year period described above, specified portions of the
stormwater records.
E. SMC will be maintaining a "Master" map displaying the development
location and file reference number of all Watershed Development
Permits thus, will be requesting this information of the Certified
Community.
ARTICLE VIII: PENALTIES AND LEGAL ACTIONS
A. Failure to comply with any of the requirements of this Ordinance
shall constitute a violation, and any person upon conviction
thereof shall be fined not more than five hundred ($500.00)
dollars for each offense. Each day the violation continues shall
be considered a separate offense.
B. The SMC or Certified Community may also take any other legal
action necessary to prevent or remedy any violation including
appropriate equitable or injunctive relief and, if applicable, an
assessment to the violator for the removal, correction, or
termination of any adverse effects upon any property resulting
from any unauthorized activity for which legal action under this
section may have been brought.
ARTICLE I%: DISCLAIMER OF LIABILITY
It is recognized that although the degree of flood protection required
by this Ordinance is considered reasonable for regulatory purposes and
is based on scientific and engineering considerations, on occasions
greater floods can and will occur, and flood heights may be increased by
man -made or natural causes. These provisions do not imply that land
outside the flood plain areas or that uses permitted within such areas
will be free from flooding or flood damages. These provisions shall not
create liability on the part of the Stormwater Management Commission or
Certified Communities or any officer or employee thereof for any flood
damages that result from reliance on this Ordinance or any
administrative decision lawfully made thereunder.
-29- September 1991
• o
Conditional Letter of Map Revision (CLOMR): A letter which indicates that the
Federal Emergency Management Agency will revise base flood elevations, flood
insurance rate zones, flood boundaries or floodway as shown on an effective
Flood Hazard Boundary Map or Flood Insurance Rate Map, once the as -built plans
are submitted and approved.
Control structure: A structure designed to control the rate of flow that
passes through the structure, given a specific upstream and downstream water
surface elevation.
Dam: All obstructions, wall embankments or barriers, together with their
abutments and appurtenant works, if any, constructed for the purpose of
storing or diverting water or creating a pool. Underground water storage
tanks are not included.
Damage: No measurable rise in flood heights on buildings currently subject to
flooding, no flooding of buildings currently not subject to flooding and no
increases in volume or velocity to the point where the rate of land lost to
erosion and scour is substantially increased.
Depressional storage areas: Non - riverine depressions in the earth where
stormwater collects.
Design storm: A selected storm event, described in terms of the probability of
occurring once within a given number of years, for which stormwater or flood
control improvements are designed and built.
Detention Facility: A man made structure for the temporary storage of
stormwater runoff with controlled release during or immediately following a
storm.
Development: Any man -made change to real estate by private or public agencies
including:
A. Construction, reconstruction, repair, or placement of a building
or any addition to a building;
B. Placement of a manufactured home on a site, preparation of a site
for a manufactured home, or the placement of a travel trailer on a
site for more than 180 days;
C. Drilling, mining, installation of utilities, construction of
roads, bridges, or similar projects;
D. Clearing of land as an adjunct of construction;
E. Construction or erection of levees, walls, fences, dams, or
culverts; channel modification; filling, dredging, grading,
excavating, paving, or other alterations of the ground surface;
storage of materials; deposit of solid or liquid waste;
F. Any other activity that might change the direction, height, volume
or velocity of flood or surface water, including the drainage of
wetlands and removal of vegetation to the extent such that the
wetland would no longer meet the criteria of supporting
hydrophytic vegetation as defined in this ordinance except that
which would be considered appropriate for management purposes.
Development does not include maintenance of existing buildings and facilities
such as re- roofing or resurfacing of roads when there is no increase in
-surface area or elevation, or gardening, plowing, and similar agricultural
practices that do not involve filling, grading, or construction of levees.
Direct discharge: Discharges of stormwater which have not passed through a
detention facility designed to the specification of this ordinance.
Drainage Area: The land area above a given point that contributes stormwater
to that point.
-32- September 1991
APPENDIX A 4F -
DEFINITIONS
Adequate Downstream Stormwater Capacity+: A stormwater management facility
shall be considered to have adequate downstream stormwater capacity if the
facility can be shown to accommodate the 100 -year stormwater, runoff without
increasing property damage to a point downstream where the increased flow or
flow velocity has attenuated.
Appficant: Any person, firm or governmental agency who owns property or the
duly appointed representative and wishes to develop that property and one who
executes the necessary forms to procure permit to carry out such development
from a municipality or from the Lake County Board.
Appropriate Use: Permissible development within the regulated floodway that
will be considered for permit issuance.
Base Flood Elevation (BFE): The elevation delineating the level of flooding
resulting from the 100 -year flood frequency elevation.
Basin plan: A study and evaluation of an individual drainage basin's
stormwater management and flood control needs.
Building: A structure that is principally above ground and is enclosed by
walls and a roof. The term includes a gas or liquid storage tank, a
manufactured home, mobile home or a prefabricated building. This term also
includes recreational vehicles and travel trailers to be installed on a site
for more than 180 days.
Buffer: An area of predominantly vegetated land to be left open, adjacent to
drainageways, wetland, lakes, ponds or other surface waters for the purpose of
eliminating or minimizing adverse impacts to such areas.
Certified Community: A community which has petitioned the SMC and has been
found by the SMC to be capable of enforcing an ordinance (or ordinances) which
contain stormwater and floodplain management rules and regulations which are
consistent with at least as stringent as these of this Countywide Stormwater
Management Plan and Ordinance.
Channel: Any river, stream, brook, branch, natural or artificial depression,
ponded area, flowage, slough, swale, ditch, conduit, culvert, ravine, or
similar natural or man -made drainageway, which has definite bed and banks or
shorelines, in or into which surface or groundwater flows, either perennially
or intermittently.
Channel Modification: Alteration of a channel by changing the physical
dimensions or materials of its bed or banks. Channel modification includes
damming, rip- rapping or other armoring, widening, deepening, straightening,
relocating, lining and significant removal of bottom or woody vegetation.
Channel modification does not includes the clearing of dead or dying
vegetation, debris, or trash from the channel. Channelization is a severe
form of channel modification typically involving relocation of the existing
channel (e.g., straightening).
Community: Any municipality (as defined at Ill. Rev. Stat., 1989, Ch. 24, 1-
1-2 (1) or the unincorporated county within Lake County acting as a unit of
local government.
Compensatory storage: An excavated, hydraulically equivalent volume of storage
.used to offset the loss of natural flood storage capacity when artificial fill
or structures are placed within a floodplain.
Conditional Approval Regulatory Floodway Map Change: Preconstruction approval
by IDOT /DWR and the Federal Emergency Management Agency of a proposed change
to the floodway map. This preconstruction approval, pursuant to this Part,
gives assurances to the property owner that once an Appropriate Use is
constructed according to permitted plans, the floodway map can be changed, as
previously agreed, upon review and acceptance of as built plans.
-31- September 1991
• o
velocities. For regulatory flood purposes, a floodway is assumed to exist
along any• watercourse with one square mile drainage area or greater.
Freeboard: An increment of height added to the base flood elevation to provide
a factor of safety for uncertainties in calculations, unknown local
conditions, wave actions and unpredictable effects such as those caused by ice
or debris jams.
Functional Assessment: An assessment of a wetlands flood storage and water
quality functions.
Hydraulically Equivalent Compensatory Storage: Compensatory storage placed
between the proposed normal water elevation and the proposed 100 -year flood
elevation. All storage lost below the existing 10 -year flood elevation is
replaced below the proposed 10 -year flood elevation. All storage lost above
the existing 10 -year flood elevation is replaced above the proposed 10 -year
flood elevation.
Hydric soil: A soil that is saturated, flooded, or ponded long enough during
the growing season to develop an anaerobic conditions in the upper part.
Hydrophytic vegetation: Plant life growing in water, soil or on a substrate
that is at least periodically deficient in oxygen as a result of excessive
water content.
IDOTfDWR: Illinois Department of Transportation, Division of Water Resources
(also IDOT -DWR).
Impervious surface: Any hard - surfaced, man made area that does not readily
absorb or retain water, including but not limited to building roofs, parking
and driveway areas, graveled areas, sidewalks and paved recreation areas.
Lake: A natural or artificial body of water encompassing an area of two or
more acres which retains water throughout the year.
Lake County Stormwater Manaaement Technical Reference Manual: The manual
prepared by the SMC which provides guidelines for complying with the Lake
County Watershed Development Ordinance, such as methods for attaining the
Ordinance's performance standards and administration details.
Letter of Man Amendment (LOMAI• Official determination by FEMA that a
specific structure is not in a 100 -year flood zone; amends the effective Flood
Hazard Boundary Map (FHBM) or Flood Insurance Rate Map (FIRM).
Letter of Map Revision (LOMRI• Letter that revises base flood or 100 -year
frequency flood elevations, flood insurance rate zones, flood boundaries-or
floodways as shown on an effective FHBM or FIRM.
Manufactured Home: A structure, transportable in one or more sections, which
is built on a permanent chassis and is designated for use with or without a
permanent foundation when connected to the required utilities. The term manu-
factured homes also include park trailers, travel trailers and other similar
vehicles placed on site for more than 180 consecutive days.
Mitigation: Measures taken to eliminate or minimize damage from development
activities, such as construction in wetlands or floodplain filling, by
replacement of the resource or other means of compensation.
NGVD: National Geodetic Vertical Datum of 1929.
Natural: When used in reference to channels means those channels formed by
the existing surface topography of the earth prior to changes made by man. A
modified channel which has regained natural characteristics over time as the
channel meanders and reestablishes vegetation may be considered a natural
channel.
Non - riverine floodplain: Floodplains not associated with streams or rivers,
such as isolated depressional storage areas.
-34- September 1991
o
�.:__.: .
Dry-Detention Facility: A dry detention facility is a detention •facflity` =.
designed to drain completely after temporary storage of stormwater flows and
to normally be dry over the majority of its bottom area.
Elevation certificates: A form published by the Federal Emergency Management
Agency that is used to certify the elevation to which a building has been
elevated.
Enforcement Officer: The SMC Director or the Certified Communities
development regulator equivalent. -
Erosion: The process whereby soil is removed by flowing water or wave action.
Fee -in -Lieu of On -Site Detention: A fee assessed to a permit applicant used
to contribute to the cost of the capital improvement component of basin plans;
such as, regional detention site(s) or improvements to downstream conveyances
"in- lieu -of" constructing on -site detention.
FEMA: Federal Emergency Management Agency and its regulations.
Flood: A general and temporary condition of partial or complete inundation of
normally dry land areas from overflow of inland or tidal waves, or the unusual
and rapid accumulation of runoff of surface waters from any source.
Flood frequency: A period of years, based on a, statistical analysis, during
which a flood of a stated magnitude may be expected to be equaled or exceeded.
Flood fringe: The portion of the riverine floodplain outside of the regulatory
floodway.
Flood Insurance Rate Mans (FIRM): A map prepared by the Federal Emergency
Management Agency or HUD that depicts the special flood hazard area (SFHA)
within a community. This map includes insurance rate zones and floodplains
and may or may not depict floodways.
Floodplain (regulatory): Floodplains may be either riverine or non - riverine
depressional areas. Riverine floodplains are those areas contiguous to a
lake, pond, stream, or stream bed whose elevation is greater than the normal
water pool elevation but equal to or lower than the projected 100 -year flood
elevation. Non - riverine floodplains are isolated depressional areas not
associated with a stream system which surrounding lands drain causing periodic
inundation by storm waters. In certain cases, the floodplain may also be
known as the Special Flood Hazard Area (SFHA). A regulatory floodplain exists
along any watercourse draining 40 acres or more or any non - riverine areas
greater than 1/4 acre.
Floodplain Management: An overall program of corrective and preventive
measures for avoiding or reducing future flood damage.
Flood Protection Elevation (FPE,Z: The elevation of the base flood or 100 -year
frequency flood plus the required 2 feet of freeboard at any given location in
the Special Flood Hazard Area (SFHA).
Floodproofing: Any combination of structural and non - structural additions,
changes or adjustments to structures or property which reduce or eliminate
flood damage to real estate or improved real property, water and sanitary
facilities, structures and their contents.
Floodproofing Certificate: A form published by the Federal Emergency
Management Agency that is used to certify that a building has been designed
and constructed to be structurally dry floodproofed to the flood protection
elevation.
Floodwav (regulatory): The channel, including onstream lakes, and that portion
of the floodplain adjacent to a stream or watercourse as designated by the
Illinois Department of Transportation, Division of Water Resources, which is
needed to store and convey the existing and anticipated future 100 year
frequency flood discharge with no more than a 0.1 foot increase in stage due
to the loss of flood conveyance or storage, and no more than a 10% increase in
-33- September 1991
• o
Substantial Improvement:Any repair, reconstruction or improvement of 4
structure, the .cost of which equals or exceeds 50 percent of the market value
of the structure either, a) before the improvements of repair is started, or
b) if the structure has been damaged, and is being restored, before the damage
occurred. For the purposes of this definition "substantial improvement" is
considered to occur when the first alteration of any wall, ceiling, floor or
other structural part of the building commences, whether or not that
alteration affects the external dimensions of the structure. The term does
not, however, include either 1) any project for improvement of a structure to
comply with existing state or local health, sanitary, or safety code
specifications which are solely necessary to assure safe living conditions or
2) any alteration off a structure listed on the National Register of Historic
Places or a State Inventory of Historic Places.
Transition Section: Reaches of the stream or floodway where water flows from
a narrow cross - section to a wide cross - section or vice - versa.
Watercourse: Any natural or man -made depression into which water flows either
regularly or intermittently draining an area of 5 acres or more.
Watershed Development Permit: A permit established by this ordinance and
issued, through the SMC or certified communities, prior to the approval of a
building permit signifying approval of procedures identified for stormwater
control, floodplain development, wetlands development and mitigation, and
water quality protection.
Watershed: The land area above a given point on a waterway that contributes
stormwater to that point. In Lake County the four major watersheds are
officially defined as: the Lake Michigan Watershed, the North Branch of the
'Chicago River Watershed, the Des Plaines River Watershed, and the Fox River
Watershed.
Wet Detention Facility: A wet detention facility designed to maintain a
permanent pool of water after the temporary storage of stormwater runoff.
Wetland: A basin that is inundated or saturated by surface or ground water at
a frequency and duration sufficient to support, under normal conditions, a
prevalence of vegetation adapted for life in saturated soil conditions (known
as hydrophytic vegetation). A wetland is identified based upon the three
attributes: 1) hydrology, 2) soils and 3) vegetation as mandated by the
current Federal wetland determination methodology authorized under Section 404
of the Clean Water Act. To aid in determining the presence or absence of
wetlands, the following courses of information may be used:
A. Lake County Wetland Inventory, Lake County Department of
Management Services;
B. National Wetland Inventory, U.S. Fish and Wildlife Service; J
C. Lake County Soil Survey, U.S. Department of
Agriculture -Soil Conservation Service;
D. U.S. Geological Survey Topographic Maps;
E. Consultant study or Lake County Soil and Water Conservation
District Natural Resource Opinion.
The above sources of information are not in hierarchical order and are to be
used only to aid in determining the approximate location of wetlands. Use of
such off -site maps or references is not intended to substitute for an on -site
delineation.
-36- September 1991
D �
Ordinary -high water mark: The point on the bank or shore at which the'pres`ence
and movement of surface waters are continuous so as to leave a distinctive'
mark, such as by erosion, destruction or prevention of terrestrial vegetation,
predominance of aquatic vegetation, or other such recognized characteristics. '
Parcel Identification Number: Permanent index number used to identify!`;
properties for tax assessment.
Pond: A natural or artificial body of water of less than two acres which
retains water year round.
Public flood control project: A flood control project which will be operated
and maintained by a public agency to reduce flood damages to existing
buildings structures and property. The project includes a hydrologic and
hydraulic study-of the existing and proposed conditions of the watershed.
Nothing in this definition shall preclude the design, engineering,
construction or financing, in whole or in part, of a flood control project by
persons or parties who are not public agencies.
Public road development: Any development activity which takes place in a
highway right -of -way or part thereof that is administered by a highway
authority for highways under its respective highway jurisdiction.
Reconstruction: The act of rebuilding a structure.
Registered Professional Engineer: An engineer registered in the State of
Illinois, under the Professional Engineer Practice Act of 1989 (III. Rev.
Stat. 1989, ch. 111, pars. 5201- 5249).
Repair, remodeling or maintenance: Activities which do not result in any
increases in the outside dimensions of a building or any changes to the
dimensions of a structure.
Retention Facility: A facility designed to completely retain a specified
amount of stormwater runoff without release except by means of evaporation,
infiltration or pumping.
Riverine: Relating to, formed by, or resembling a river (including
tributaries, streams, and creeks).
Sedimentation: The processes that deposit soils, debris, and other materials
either on other ground surfaces or in bodies of water or watercourses.
SMC Director: The administrative head of the staff of the Lake County
Stormwater Management Commission.
Special Flood Hazard Area (SFHA): Any base flood area subject to flooding
from a river, creek, intermittent stream, ditch, or any other identified
channel or ponding and shown on a Flood Hazard Boundary Map or Flood Insurance
Rate Map as Zone A, AO, Al -30, AE, A99, AH, VO, V30, VE, V, M, or E.
Stormwater Management:'A set of actions taken to control stormwater runoff
with the objectives of providing controlled surface drainage, flood control
and pollutant reduction in runoff.
Stormwater Management Commission (SMC): The Lake County Stormwater Management
Commission established and existing under Ill. Rev. Statutes, Chapter 34, Par.
5 -1062 for the purposes of developing, revising and implementing a countywide
stormwater management plan.
Stormwater Management System: The collection of natural features and man -made
facilities which define the stormwater management for a development.
Structure: The results of a man -made change to the land constructed on or
below the ground, including the construction, reconstruction or placement of a
building or any addition to a building; installing a manufactured home on a
site; preparing a site for a manufactured home or installing a travel trailer
on a site for more than 180 days.
-35- September 1991
-38- September 1991
0
`
COMMUNITY WATER* MAP
TYPE
MAP DATE
DESCRIPTION
W. FORK N. BRANCH
CHICAGO RIVER
FIS
11/03/82
NOT ON REG. MAP --
59,800 FT ABOVE
MOUTH TO HALF DAY
ROAD.
HASTINGS CREEK
FIS
11/03/82
MOUTH AT NORTH MILL
CREEK TO 34,875 FT.
ABOVE MOUTH.
MILL CREEK
FIS
11/03/82
US. ROUTE 41 TO 5000
FT ABOVE VILLAGE OF
GRAYSLAKE CORP.
LIMITS.
N. MILL CREEK
FIS
11/03/82
CONFLUENCE WITH MILL
CREEK TO STATE
BOUNDARY.
BUFFALO CREEK
FIS
11/03/82
ARLINGTON HEIGHTS
ROAD TO 39875 FT
ABOVE MOUTH AND
43650 FT TO 44250 FT
ABOVE MOUTH AND LONG
GROVE CORP. LIMITS
TO ROUTE 53 AND CUBA
ROAD TO LAKE ZURICH
CORP. LIMITS.
TRIB TO BUFFALO CREEK
FIS
11/03/82
KILDEER CORP. LIMITS
AT 12230 FT TO 13480
FT ABOVE MOUTH.
MUTTON CREEK
FIS
11/03/82
14200 FT. TO 16800
FT ABOVE MOUTH.
INDIAN CREEK
FIS
11/03/82
1600 FT TO 23900 FT
ABOVE MOUTH AND
44400 FT TO 70800 FT
ABOVE MOUTH AT
SCHWERMAN ROAD.
W. BR. INDIAN CREEK
FIS
11/03/82
1050 FT ABOVE MOUTH
AT EJ &E RR.
S. BR. INDIAN CREEK
FIS
11/03/82
MOUTH AT INDIAN
CREEK TO STATE ROUTE
22 AND STATE ROUTE
83 TO 10025 FT ABOVE
MOUTH AND 16875 FT
ABOVE MOUTH TO STATE
ROUTE 22.
APTAKISIC CREEK
FIS
11/03/82
MOUTH AT DESPLAINES
RIVER TO 24100 FT
ABOVE MOUTH.
TRIB TO APTAKISIC CREEK
FIS
11/03/82
MOUTH AT APTAKISIC
CREEK TO 2210 FT
ABOVE MOUTH.
IRONDALE CREEK
FIS
11/03/82
MOUTH AT MEADOW
HAVEN CREEK TO
GUERIN ROAD.
MEADOW HAVE CREEK
FIS
11/03/82
MOUTH AT TRIB. 1 TO
O'PLAINE ROAD.
FLINT CREEK
FIS
11/03/82
MOUTH AT FOX RIVER
TO 22800 FT ABOVE
MOUTH.
N. ARM FLINT CREEK
FIS
11/03/82
0.698 MI. TO 0.80
MI. ABOVE MOUTH.
EAGLE CREEK
FIS
11/03/82
9850 FT TO 11750 FT
ABOVE MOUTH AND
14300 FT TO 16000 FT
ABOVE MOUTH.
-38- September 1991
APPENDIX 8
IDOT /DWR Designated Regulatory
Flo odway Maps-
y! ��-
COMMUNITY WATERWAY
MAP TYPE
MAP DATE
DESCRIPTION
UNINCORPORATED DESPLAINES RIVER
REG
10/01/78
DP -22: COUNTY LINE
ROAD TO RIVERWOODS
CORPORATE LIMITS.
DP -23: EDWARD L.
RYERSON CONSV. AREA
TO LINCOLNSHIRE
CORPORATE LIMITS.
DP- 24,25: CAPTAIN
DANIEL WRIGHT FOREST
PRESERVE. DP -26:
FOREST PRESERVE TO
LIBERTYVILLE
CORPORATE LIMITS.
DP -29: MILW. ST.
PAUL & PACIFIC R.R.
TO LIBERTYVILLE
CORP. LIMITS. DP-
31,32: UNINCORP.
NEAR WAUKEGAN
(WARREN AND
LIBERTYVILLE TWPS.).
DP -32: FOREST
PRESERVE (RIVER
HILL). DP- 32,33:
FOREST PRESERVE
NORTH LIMITS TO
WASHINGTON STREET
(GURNEE). DP-
34,35,36: FOREST
PRESERVE & UNINCORP.
TO WADSWORTH CORP.
LIMITS. DP -36: TO
WISCONSIN BORDER.
DESPLAINES RIVER
TRIB (RUSSEL
FIS
11/03/82
CONFLUENCE WITH
DESPLAINES RIVER TO
WADSWORTH ROAD.
E. FK. DESPLAINES
RIVER TRIB
FIS
11/03/82
CONFLUENCE WITH
DESPLAINES RIVER
TRIB. TO WAVERLY
STREET.
FOX RIVER
FIS
11/03/82
MCHENRY /LAKE COUNTY
BOUNDARY S. TO N.
COUNTY BOUNDARY AND
GRASS LAKE TO STATE
BOUNDARY.
SKOKIE RIVER
REG
01/01/75
NB- 17,18,19:122,300
FT. TO 126,300 FT.
ABOVE MOUTH AND
BUCKLEY ROAD TO
135,250 FT. ABOVE
MOUTH.
MID. FORK N. BRANCH
CHICAGO RIVER
REG
01/01/75
NB- 27,30,31,32:
BETWEEN BANNOCKBURN
AND LAKE FOREST AND
75,050 FT. TO
101,550 FT. ABOVE
CONFLUENCE WITH
SKOKIE RIVER.
-37-
September 1991
0
COMMUNITY WATERWAY
ANTIOCH
BANNOCKBURN
DEERFIELD
0
MAP TYPE MAP DATE DESCRIPTION
DIAMOND LAKE DRAIN
FIS
11/03/82
STATE ROUTE 83 TO
ANTIOCH LAKE DRAIN
FIS
06/15/81
10500 FT ABOVE
CROSS LAKE TRIB.
FIS
06/15/81
CONFLUENCE WITH
SILVER LAKE DRAIN
FIS
06/15/81
INDIAN CREEK.
DEER LAKE DRAIN
FIS
11/03/82
2450 FT TO 16250 FT
CHICAGO RIVER
REG
01/01/75
ABOVE CONFLUENCE
WITH INDIAN CREEK.
FOREST LAKE DRAIN
FIS
11/03/82
1200 FT TO 6400 FT
W. FORK N. BR.
ABOVE CONFLUENCE
CHICAGO RIVER
REG
01/01/75
WITH INDIAN CREEK.
NORTH SHORE DRAIN
FIS
11/03/82
4920 FT TO 6100 FT
ABOVE MOUTH.
NORTH SHORE DITCH
FIS
11/03/82
BLANCHARD ROAD TO
CHICAGO RIVER
REG
01/01/75
2375 FT ABOVE
BLANCHARD ROAD.
ROUND LAKE DRAIN
FIS
11/03/82
MOUTH AT LONG LAKE
DRAIN TO 7600 FT
ABOVE MOUTH.
ROUND LAKE DRAIN TRIB
PIS
11/03/82
MOUTH OF ROUND LAKE
CHICAGO RIVER
REG
01/01/75
DRAIN TO 1080 FT
ABOVE MOUTH.
BANGS LAKE DRAIN
FIS
11/03/82
MOUTH AT SLOCUM LAKE
TO 10250 FT ABOVE
MOUTH AND 13800 FT
TO 1600 FT ABOVE
MOUTH.
SLOCUM LAKE DRAIN
FIS
11/03/82
MOUTH AT FOX RIVER
TO SLOCUM LAKE
SPILLWAY.
SILVER LAKE DRAIN
FIS
11/03/82
MOUTH AT SEQUOIT
CREEK TO 2300 FT
ABOVE MOUTH.
KELLOGG RAVINE
FIS
11/03/82
18800 FT TO 25600 FT
ABOVE MOUTH AND
29500 FT TO 31600 FT
ABOVE MOUTH.
SEQUOIT CREEK
FIS
06/15/81
ANTIOCH LAKE DRAIN
FIS
06/15/81
CROSS LAKE TRIB.
FIS
06/15/81
SILVER LAKE DRAIN
FIS
06/15/81
MID. FORK N. BR.
CHICAGO RIVER
REG
01/01/75
NB- 26,27: 50200 FT.
TO 52900 ABOVE
MOUTH.
W. FORK N. BR.
CHICAGO RIVER
REG
01/01/75
NB -41: 62500 FT. TO
66,250 FT ABOVE
MOUTH AT DUFFY LANE.
MID. FORK N. BR.
CHICAGO RIVER
REG
01/01/75
NB- 25,26,27: 33600
FT. to 47050 FT.
ABOVE MOUTH AND
48500 FT. TO 50300
ABOVE MOUTH.
W. FORK N. BR.
CHICAGO RIVER
REG
01/01/75
NB- 39,40,41: 44350
FT. ABOVE MOUTH TO
MONTGOMERY DRIVE
(LAKE -COOK CORPORATE
LIMITS TO LAKE
ELEANOR)
-40- September 1991
COMMUNITY .. ; WATERWAY }^ 4." MAP
TYPE
+MAP DATE
DESCRIPTION`, ----
BULL CREEK �.
FIS
11/03/82
MOUTH AT DESPLAINES
RIVER TO 7650 FT
ABOVE MOUTH AND
MIDLOTHIAN ROAD TO
22000 FT ABOVE
MOUTH.
BULL CREEK TRIB
PIS
11/03/82
200 FT TO 11425 FT
ABOVE MOUTH.
N. BR. BULL, CREEK TRIB
FIS
11/03/82
MOUTH AT BULL CREEK
TRIB. TO 1525 FT
ABOVE MOUTH.
W. BR. BULL CREEK TRIB
FIS
11/03/82
MOUTH AT BULL CREEK
TRIB TO BULL CREEK
DRIVE AT 1250 FT
ABOVE MOUTH.
BULL CREEK (NEAR WAUKEGAN)
FIS
11/03/82
CHI. &NW RR TO 550
FT ABOVE BEACH RD.
GREENLEAF CREEK
FIS
11/03/82
4400 FT. TO 5750 FT
ABOVE AND 8700 FT TO
8920 FT ABOVE
CONFLUENCE WITH
GURNEE TRIB.
NIPPERSINK CREEK
FIS
11/03/82
FOX LAKE CORP.
LIMITS TO COUNTY
BOUNDARY.
SEQUOIT CREEK
FIS
11/03/82
3650 FT TO 5300 FT
ABOVE MOUTH AND 9650
FT TO 10400 FT ABOVE
MOUTH AND 13450 FT
TO 15100 FT ABOVE
MOUTH.
SQUAW CREEK
FIS
11/03/82
MOUTH AT FOX LAKE TO
32150 FT ABOVE MOUTH
AND 43600 FT TO
55200 FT ABOVE
MOUTH.
TOWER LAKE CREEK
FIS
11/03/82
4000 FT TO 4600 FT
ABOVE MOUTH.
WILLOW ROAD CREEK
FIS
11/03/82
1375 FT TO 3750 FT
ABOVE MOUTH.
GARLAND ROAD TRIB
FIS
11/03/82
MOUTH AT BANGS LAKE
TO 2000 FT ABOVE
MOUTH.
SUBURBAN COUNTRY CLUB TRIB
FIS
11/03/82
MOUTH AT DESPLAINES
RIVER TO BEACH ROAD.
S. FORK SUBURBAN C.C. TRIB
FIS
11/03/82
CONFLUENCE WITH
SUBURBAN COUNTRY
CLUB TRIB TO
WAUKEGAN CORPORATE .
LIMITS ABOVE WALL
AVE.
TRIBUTARY NO. 1
FIS
11/03/82
CONFLUENCE WITH
DESPLAINES RIVER TO
10050 FT ABOVE
CONFLUENCE.
KIMBALL AVE TRIB.
FIS
11/03/82
1200 FT TO 1670 FT
ABOVE MOUTH.
FARRINGTON DITCH
FIS
11/03/82
CHECKER ROAD
(BUFFALO GROVE) TO
4750 FT ABOVE MOUTH.
SEAVEY DRAINAGE DITCH
FIS
11/03/82
MOUTH AT INDIAN
CREEK TO US ROUTE 45
AND EJ &E RR TO 27100
FT ABOVE MOUTH.
-39- September 1991
COMMUNITY
�►
WATERWAY MAP
TYPE
0
MAP DATE
DESCRIPTION
LAKE ZURICH
N. FLINT CREEK
FIS
07/05/83
BUFFALO CREEK
FIS
07/05/83
LIBERTYVILLE
DESPLAINES RIVER
REG
10/01/78
DP- 26 -30: SOUTH
CORPORATE LIMITS
ABOVE RTE. 60 TO
NORTH CORPORATE
LIMITS.
LINCOLNSHIRE
DESPLAINES RIVER
REG
10/01/78
DP- 23,24: SOUTH
CORPORATE LIMITS TO
HALF DAY ROAD.
INDIAN CREEK
FIS
06/11/82
MOUTH AT DESPLAINES
RIVER TO 4400 FT.
ABOVE MOUTH PAST RTE
22.
W. FORK N. BR.
CHICAGO RIVER
FIS
06/11/82
NOT ON REG. MAP --
WITHIN CORPORATE
LIMITS OF
LINCOLNSHIRE.
LINDENHURST
HASTINGS CREEK
FIS
01/02/80
LONG GROVE
INDIAN CREEK
FIS
01/14/83
S. BR. INDIAN CREEK TRIB.
FIS
01/14/83
S. BR. INDIAN CREEK
FIS
01/14/83
BUFFALO CREEK
FIS
01/14/83
TRIB. TO BUFFALO CREEK
FIS
01/14/83
METTAWA
DESPLAINES RIVER
REG
10/01/78
DP- 25 -28: S. CORP.
LIMITS TO 60 TOWN
LINE ROAD AND EJ &E
RR TO NORTH CORP.
LIMITS.
MUNDELEIN
BULL CREEK
FIS
07/02/81
SEAVY DRAINAGE DITCH
FIS
07/02/81
DIAMOND LAKE DRAIN
FIS
07/02/81
NORTH BARRINGTON
FLINT CREEK
FIS
10/18/83
E. TRIB. FLINT CREEK
FIS
10/18/83
N. FLINT CREEK
FIS
10/18/83
SIGNAL HILL TRIB.
FIS
10/18/83
HONEY LAKE DRAIN
FIS
10/18/83
NORTH CHICAGO
SKOKIE RIVER
REG
01/01/75
NB- 18,19: SOUTHWEST
CORP. LIMITS TO 10TH
STREET.
OLD MILL CREEK
MILL CREEK
FIS
08/01/80
NORTH MILL CREEK
FIS
08/01/80
PARK CITY
GREENLEAF CREEK
FIS
10/15/81
RIVERWOODS
DESPLAINES RIVER
REG
10/01/78
DP- 22,23: 76.03 MI
TO 77.64 MI ABOVE
MOUTH.
W. FORK N. BR.
CHICAGO RIVER
REG
01/01/75
NB- 41,42: 11.6 MI TO
13.16 MI ABOVE
MOUTH.
ROUND LAKE
SQUAW CREEK
FIS
08/01/80
ROUND LAKE DRAIN
FIS
08/01/80
-42- September 1991
COMMUNITY < `^
_WATERWAY
MAP TYPE
MAP DATE
DESCRIPTION�M' ,.
GRAYSLAKE
AVON- FREEMONT'DITCH
FIS
06/04/80
GREEN OAKS
IRONDALE CREEK
FIS
03/02/81
FOX RIVER
FIS
MEADOW HAVEN CREEK
FIS
03/02/81
FIS
GURNEE
DESPLAINES RIVER
REG
10/01/78
DP- 32,33,34:
BELVIDERE ROAD TO
26700 FT. ABOVE
BELVIDERE ROAD AT
RTE. 41:
GURNEE TRIB.
FIS
12/16/80
CONFLUENCE WITH
DESPLAINES RIVER TO
U.S. RTE. 41.
S. FORK GURNEE TRIB
FIS
12/16/80
CONFLUENCE WITH
GURNEE TRIB. TO 4225
FT. ABOVE
CONFLUENCE.
HAINESVILLE
SQUAW CREEK
FIS
02/01/84
HAWTHORN WOODS
INDIAN CREEK
FIS
11/02/83
W. BR. INDIAN CREEK
FIS
11/02/83
NORTH FLINT CREEK
FIS
11/02/83
FOREST LAKE DRAIN
FIS
11/02/83
HIGHLAND PARK
SKOKIE PARK
REG
01/01/75
NB- 10- 14:LAKE -COOK
ROAD COUNTY BOUNDARY
TO OLD ELM ROAD.
MID. FORK N. BR.
CHICAGO RIVER
REG
01/01/75
NB- 25,26,27: LAKE -
COOK ROAD COUNTY
BOUNDARY TO 56,100
FT. ABOVE CONFLUENCE
SKOKIE RIVER.
ISLAND LAKE
KILDEER
LAKE BARRINGTON
LAKE BLUFF
LAKE FOREST
FOX RIVER
FIS
COTTON CREEK
FIS
BUFFALO CREEK
FIS
TRIB. TO BUFFALO CREEK
FIS
S. FORK TRIB.
BUFFALO CREEK
FIS
SOUTH BRANCH INDIAN CREEK
FIS
FOX RIVER
FIS
FLINT CREEK
FIS
N. ARM FLINT CREEK
FIS
SKOKIE RIVER REG
SKOKIE RIVER
MID. FORK N. BR.
LAKE VILLA LAKE VILLA CREEK
S. BR. LAKE VILLA CREEK
NORTH SHORE DRAIN
EAGLE CREEK
E. BR. EAGLE CREEK
N. BR. EAGLE CREEK
REG
REG
FIS
FIS
FIS
FIS
FIS
FIS
09/16/82
09/16/82
03/02/81
03/02/81
03/02/81
03/02/81
01/02/81
01/02/81
01/02/81
01/01/75 NB- 16,17: 118200 FT.
ABOVE MOUTH TO EJ &E
R.R. AT 126100 FT
ABOVE MOUTH.
01/01/75 NB- 14,15,16: OLD ELM
ROAD TO 118200 FT.
ABOVE MOUTH.
01/01/75 NB- 27,28,29,30:
56100 FT. TO 81150
FT. ABOVE MOUTH.
07/02/81
07/02/81
07/02/81
07/02/81
07/02/81
07/02/81
-41- September 1991
WAUCONDA
WAUKEGAN
WINTHROP HARBOR
ZION
WILLOW ROAD CREEK
FIS
BANGS LAKE DRAIN
FIS
GARLAND ROAD TRIB.
FIS
KIMBALL AVE TRIB.
FIS
DESPLAINES RIVER
REG
WAUKEGAN RIVER
FIS
BULL CREEK
FIS
SUBURBAN COUNTRY CLUB
TRIB FIS
COMMUNITY.
WATERWAY
MAP TYPE
MAP DATE
DESCRIPTION`
ROUND LAKE BEACH
ROUND LAKE DRAIN
PIS
12/25/81
ROUND LAKE DRAIN TRIB
FIS
12/25/81
ROUND LK HEIGHTS
ROUND LAKE DRAIN TRIB
FIS
01/02/80
ROUND LAKE PARK
SQUAW CREEK
FIS
06/04180
THIRD LAKE
MILL CREEK /THIRD LAKE
AVON - FREMONT DITCH
FIS
12/25/81
TOWER LAKES
TOWER LAKE CREEK
FIS
03/02/81
LAKE BARRINGTON DRAIN
FIS
03/02/81
TIMBER LAKE DRAIN
FIS
03/02/81
VERNON HILLS
SEAVEY DRAINAGE
FIS
08/01/80
WADSWORTH
DESPLAINES RIVER
REG
10/01/78
SOUTH
CORPORATE
LIMITS
TO 10400 FT
ABOVE
CORP. LIMITS.
MILL CREEK
FIS
02/04/81
MOUTH
AT DESPLAINES
RIVER
TO 3250 FT
ABOVE
MOUTH.
WAUCONDA
WAUKEGAN
WINTHROP HARBOR
ZION
WILLOW ROAD CREEK
FIS
BANGS LAKE DRAIN
FIS
GARLAND ROAD TRIB.
FIS
KIMBALL AVE TRIB.
FIS
DESPLAINES RIVER
REG
WAUKEGAN RIVER
FIS
BULL CREEK
FIS
SUBURBAN COUNTRY CLUB
TRIB FIS
NORTH SHORE DITCH FIS
LAKE MICHIGAN TRIB. FIS
KELLOGG RAVINE FIS
N. BR. KELLOGG RAVINE FIS
KELLOGG RAVINE FIS
12/01/81
12/01/81
12/01/81
12/01/81
10/01/78 268600 FT TO 273100
FT ABOVE MOUTH
06/15/81 GLEN FLORA AVE. .
TO
SUNSET AVE.
06/15/81 21250 FT TO 24100 FT
ABOVE MOUTH.
06/15/81 4900-FT ABOVE MOUTH
TO CHI. & NW RR AT
13100 FT ABOVE
MOUTH.
06/15/81 150 FT ABOVE WESTERN
AVE. TO 3950 FT.
ABOVE WESTERN AVE.'
12/02/80
12/02/80
12/02/80
1/16/81
-43- September 1991