The Village hereby finds that:
A.
The soil types found in the Village are susceptible to erosion and
if left unprotected could cause severe loss of soil with resultant
damage to property;
B.
The topography of the Village contains areas with steep slopes which,
if clearing of trees and/or inappropriate construction takes place,
could result in severe erosion and slope stability problems which
could result in damage to property;
C.
Excessive quantities of soil may erode from areas undergoing development
for certain nonagricultural uses, including but not limited to the
construction of dwelling units, commercial buildings and industrial
plants, the building of roads and highways, the modification of stream
channels and drainageways, and the creation of recreational facilities;
D.
The washing, blowing, and falling of eroded soil across and upon
roadways endangers the health and safety of users thereof, by decreasing
vision and reducing traction of road vehicles;
E.
Soil erosion necessitates the costly repairing of gullies, washed-out
fills, and embankments;
F.
Sediment from soil erosion tends to clog sewers and ditches and to
pollute and silt rivers, streams, lakes, sinkholes, wetlands, and
reservoirs;
G.
Sediment limits the use of water and waterways for most beneficial
purposes, promotes the growth of undesirable aquatic weeds, destroys
fish and other desirable aquatic life, and is costly and difficult
to remove; and
H.
Sediment reduces the channel capacity of waterways and the storage
capacity of floodplains and natural depressions, resulting in increased
chances of flooding at risk to public health and safety.
It is the objective of this chapter to control soil erosion
and sedimentation caused by development activities, including clearing,
grading, stripping, excavating, and filling of land, in the Village.
A.
Water quality shall adhere to:
(1)
Illinois Environmental Protection Act (415 ILCS 5/12), from Ch. 111 1/2,
par. 1011 and 1012;
(2)
Illinois Pollution Control Board Rules and Regulations (Ill. Admin.
Code): Title 35: Environmental Protection, Subtitle C: Water Pollution
Chapter I: Pollution Control Board, Part 302, Water Quality Standards;
and
(3)
Illinois Pollution Control Board Rules and Regulations (Ill. Admin.
Code): Title 35: Environmental Protection, Subtitle C: Water Pollution,
Chapter I: Pollution Control Board, Part 304, Effluent Standards.
B.
Measures taken to control soil erosion and off-site sediment runoff shall be adequate to assure that sediment is not transported from the site by a storm event of ten-year, twenty-four-hour frequency or less. The following principles shall apply to all new development or redevelopment activities within the Village and to the preparation of the submissions required under § 291-19 of this chapter:
(1)
New development or redevelopment shall be related to the topography
and soils of the site so as to create the least potential for erosion.
Areas of steep slopes greater than 33% where high cuts and fills may
be required are to be avoided wherever possible, and natural contours
should be followed as closely as possible.
(2)
Natural vegetation shall be retained and protected wherever possible.
Areas immediately adjacent to natural watercourses, lakes, ponds,
sinkholes, and wetlands are to be left undisturbed wherever possible.
Temporary crossings of watercourses, when permitted, must include
appropriate stabilization measures.
(3)
Special precautions shall be taken to prevent damages resulting from
any necessary development activity within or adjacent to any stream,
lake, pond, sinkhole or wetland. Preventive measures shall reflect
the sensitivity of these areas to erosion and sedimentation.
(4)
The smallest practical area of land shall be exposed for the shortest
practical time during development.
(5)
Sediment basins or traps, filter barriers, diversions, and any other
appropriate sediment or runoff control measures shall be installed
prior to site clearing and grading and maintained to remove sediment
from run-off waters from land undergoing development.
(6)
The selection of erosion and sediment control measures shall be based
on assessment of the probable frequency of climatic and other events
likely to contribute to erosion, and on evaluation of the risks, costs,
and benefits involved.
(7)
In the design of erosion control facilities and practices, aesthetics
and the requirements of continuing maintenance must be considered.
(8)
Provision shall be made to accommodate the increased run-off caused
by changed soil and surface conditions during and after development.
Drainageways shall be designed so that their final gradients and the
resultant velocities and rates of discharge will not create additional
erosion on-site or downstream.
(9)
Permanent vegetation and structures shall be installed and functional
as soon as practical during development.
(10)
Those areas being converted from agricultural purposes to other
land uses shall be vegetated with an appropriate protective cover
prior to development.
(11)
All waste generated as a result of site development activity
shall be properly disposed of and shall be prevented from being carried
off the site by either wind or water.
(12)
All construction sites shall provide measures to prevent sediment
from being tracked onto public or private roadways.
(13)
All temporary soil erosion and sediment control practices shall
be maintained to function as intended until the contributing drainage
area has been permanently stabilized, at which time they shall be
removed.
Each applicant shall submit the information depending on development size, and regulated to ensure that the provisions of this chapter are met. The submittal shall include sufficient information to evaluate the environmental characteristics of the property, the potential adverse impacts of the development related to erosion both on-site and off-site, and the effectiveness of the proposed erosion and sediment control plan in reducing sediment loss and meeting the provisions of § 291-2. The applicant shall certify on the drawing that all clearing, grading, drainage, and construction shall be accomplished in strict conformance with the erosion and sediment control plan. The following information shall be submitted for both existing and proposed property conditions, new developments or redevelopments meeting the requirements of § 291-3:
B.
Mapping and descriptions. The existing and proposed erosion and sediment
control features of the property and immediate vicinity, including:
(2)
Location of the slope disturbance line;
(3)
Location and description of the erosion and sediment control measures
to be employed during construction;
(4)
For any structures proposed to be located on the slope side of the
slope disturbance line, the map shall include the limits of disturbance,
including tree removal, erosion and sediment control measures during
construction, cross-section view of any proposed cut or fill, erosion
and sediment control measures during construction, details of method(s)
proposed for providing slope stability, permanent stormwater control
measures, and permanent erosion and sediment control measures, all
being certified by a registered professional engineer.
(5)
The predominant soil types on the site, their location, and their
limitations for the proposed use as defined by the USDA Natural Resources
Conservation Service.
(6)
The proposed use of the site, including present and planned development, areas of clearing, stripping, grading, excavation and fill; proposed contours, finished grades, and street profiles; the stormwater plan as required in Article III; kinds and locations of utilities, areas and acreages proposed to be paved, sodded or seeded, vegetatively stabilized, or left undisturbed; and the location of specimen trees over 18 inches in diameter and their type.
(7)
The erosion and sediment control plan showing all measures necessary
to meet the requirements of this chapter throughout all phases of
construction and those remaining permanently after completion of the
development of the site, including:
(a)
Location and description, including standard details, of all
sediment control measures, runoff control measures, including diversions,
waterways and outlets, and design specifics of sediment basins and
traps, including outlet details.
(b)
Location and description of all soil stabilization and erosion
control measures, including seeding mixtures and rates, types of sod,
method of seedbed preparation, expected seeding dates, type and rate
of lime and fertilizer application, kind and quantity of mulching
for both temporary and permanent vegetative control measures, and
types of nonvegetative stabilization measures.
(c)
Location and description of methods to prevent tracking of sediment
off-site, including construction entrance details, as appropriate.
(d)
Description of dust and traffic control measures.
(e)
Locations of stockpiles and description of stabilization methods.
(f)
Location of off-site fill or borrow volumes, locations and methods
of stabilization.
(g)
Provisions for maintenance of control measures, including type
and frequency of maintenance, easements, and estimates of the cost
of maintenance.
(h)
The proposed phasing of development of the site, including stripping
and clearing, rough grading and construction, and final grading and
landscaping. Phasing should identify the expected date on which clearing
will begin, the estimated duration of exposure of cleared area, and
the sequence of installation of temporary sediment control measures
(including perimeter controls), installation of stormwater drainage,
paving streets, and parking areas, final grading and the establishment
of permanent vegetative cover, and the removal of temporary measures.
It shall be the responsibility of the applicant to notify the Mayor
and his designee of any significant changes which occur in the site
development schedule after the initial erosion and sediment control
plan has been approved.
The preparation of soil erosion and sediment control plans shall
follow the principles outlined in the Illinois Procedures and Standards
for Urban Soil Erosion and Sedimentation Control, except Chapter 6,
published by the Urban Committee of the Association of Illinois Soil
and Water Conservation Districts. The design criteria, standards,
and methods shall be prepared in accordance with the requirements
of this chapter and the standards and specifications contained in
the Illinois Urban Manual prepared for the Illinois Environmental
Protection Agency by the USDA Natural Resources Conservation Service,
which standards and methods are hereby incorporated into this chapter
by reference. In the event of conflict between the provisions of said
manuals and of this chapter, this chapter shall govern.
A.
Erosion and sediment control design requirements. New developments or redevelopments shall comply with § 291-19 and meet the following:
(1)
Control measures shall be constructed to control runoff from the
property to such an extent possible that sediment is retained on-site.
(2)
Temporary on-site control measures required shall be constructed
and functional prior to initiating clearing, grading, stripping, excavating
or fill activities on the site.
(3)
Disturbed areas shall be stabilized with permanent measures within
seven calendar days following the end of active disturbance, or redisturbance,
consistent with the following criteria:
(4)
All temporary and permanent erosion and sediment control practices
must be maintained and repaired as needed to assure effective performance
of their intended function.
(5)
All temporary erosion and sediment control measures shall be disposed
in a proper manner within 30 days after final site stabilization is
achieved with permanent soil stabilization measures. Trapped sediment
and other disturbed soils resulting from the disposition of temporary
measures shall be permanently stabilized to prevent further erosion
and sedimentation.
(6)
Site development requirements. On-site sediment control measures,
as specified by the following criteria, shall be constructed as specified
in the referenced handbooks, and functional prior to initiating clearing,
grading, stripping, excavating or fill activities on the site:
(a)
For new developments or redevelopments less than one acre, or
for a tract of land where a single-family dwelling is being erected
and less than 10,000 square feet of impervious surface is being developed,
filter barriers (including filter fences, straw bales, or equivalent
control measures) shall be constructed to control all on-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.
(b)
For new developments or redevelopments of one acre to five acres,
a sediment trap designed in accordance with the IEPA Standards and
Specifications for Soil Erosion or equivalent control measure shall
be constructed at the downslope point of the disturbed area.
[Amended at time of adoption of Code (see Ch. 1, General
Provisions, Art. I)]
(c)
For new developments or redevelopments greater than five acres,
a sediment basin or equivalent control measure shall be constructed
at the downslope point of the disturbed area.
(d)
Sediment basin and sediment trap designs shall provide for both "dry" detention and "wet" detention sediment storage. The detention storage shall be composed of equal volumes of "wet" detention storage and "dry" detention storage and each shall be sized as regulated in Article III. The release rate of the basin shall be that rate as regulated in Article III. The elevation of the outlet structure shall be placed such that it only drains the dry detention storage.
(e)
The sediment storage shall be sized to store the estimated sediment
load generated from the site over the duration of the construction
period with a minimum storage equivalent to the volume or sediment
generated in one year. For construction periods exceeding one year,
the one-year sediment load and a sediment removal schedule may be
substituted.
(f)
The alteration of sinkholes by filling, grading or excavation
is prohibited, including an area within 25 feet from the rim.
(g)
To the extent possible or as otherwise regulated in this chapter,
all desirable trees eight inches in diameter and larger shall be protected
for their present and future value for erosion protection and other
environmental benefits. Trees that have been selected for preservation
shall be marked prior to the beginning of any clearing, grading, stripping,
excavation, or filling of the site. A "no construction" zone shall
be established and marked at the perimeter of the drip line of each
tree which is to be preserved.
(7)
Stormwater conveyance channels, including ditches, swales, and diversions, and the outlets of all channels and pipes shall be designed and constructed as regulated in Article III. All constructed or modified channels shall be stabilized within 48 hours, consistent with the standards as required in the IEPA Erosion Control Manual Standards and Specifications for Soil Erosion and Sediment Control.
(8)
Land disturbance activities in stream channels shall be avoided, where possible, or as regulated in Article III. If disturbance activities are unavoidable, the following requirements shall be met:
(a)
Construction vehicles shall be kept out of the stream channel
to the maximum extent practicable. Where construction crossings are
necessary, temporary crossings shall be constructed of nonerosive
material, such as riprap or gravel.
(b)
The time and area of disturbance of stream channels shall be
kept to a minimum. The stream channel, including bed and banks, shall
be stabilized within 48 hours after channel disturbance is completed,
interrupted, or stopped.
(9)
Storm sewer inlets and culverts shall be protected by sediment traps
or filter barriers meeting accepted design standards and specifications.
(10)
Soil storage piles containing more than 10 cubic yards of material
shall not be located with a downslope drainage length of less than
25 feet to a roadway, drainage channel, or sinkhole. Filter barriers,
including straw bales, filter fence, or equivalent, shall be installed
immediately on the downslope side of the piles.
(11)
If dewatering devices are used, discharge locations shall be
protected from erosion. All pumped discharges shall be routed through
appropriately designed sediment traps or basins, or equivalent, and
shall not be deposited into a sinkhole.
(12)
Each site shall have graveled (or equivalent) entrance roads,
access drives, and parking areas of sufficient length and width to
prevent sediment from being tracked onto public or private roadways.
Any sediment reaching a public or private road shall be removed by
shoveling or street cleaning (not flushing) before the end of each
workday and transported to a controlled sediment disposal area.
All soil erosion and sediment control measures necessary to
meet the requirements of this chapter shall be maintained periodically
by the applicant or subsequent landowner during the period of land
disturbance and development of the site in a satisfactory manner to
ensure adequate performance.
All waste materials generated during construction activities
must be properly disposed. Examples of construction site waste may
consist of, but not be limited to, all building materials, raised
structure debris, concrete (including concrete truck wash), asphalt,
brick, excess soil, rebar, erosion and sediment control materials,
cleared vegetation, chemicals, temporary bathroom facilities and all
other construction site wastes.
A.
Activities that are applicable to this chapter, per § 291-3, must provide a construction site stormwater pollution prevention plan (CSSPPP).
B.
The construction site stormwater pollution prevention plan may be
a full-sized plan sheet with necessary notes for requirements or may
be a narrative explaining construction site operating procedures to
minimize or eliminate stormwater pollution as a result of construction
activities.
C.
The items covered in an approvable CSSPPP are dependent on the activities
and the materials required on site to complete the project. Therefore,
the detail of the plan may be more or less depending on site activities
planned. Standard items included in a CSSPPP are, but are not limited
to:
D.
Should construction site activities/materials change during construction,
the CSSPPP must reflect the changes. Therefore, the plan must be kept
on-site at all times and be altered as necessary with the approval
of the Inspector. Should major changes be warranted, a revised plan
must be submitted for review and approval.
