[Ord. No. 1548 §1, 12-4-2006]
A.
No
person shall be granted a land disturbance permit for any activity
that would require the uncovering of ten thousand (10,000) or more
square feet without the submittal of an Erosion and Sediment Control
Plan and approval by the City and the Missouri Department of Natural
Resources (MDNR).
C.
Each
application shall bear the name(s) and address(es) of the owner or
developer of the site and of any consulting firm retained by the applicant
together with the name of the applicant's principal contact at such
firm and shall be accompanied by a filing fee.
D.
Each
application shall include a statement that any land clearing, construction
or development involving the movement of earth shall be in accordance
with the Erosion and Sediment Control Plan.
E.
The
applicant will be required to file with the City a faithful performance
bond, letter of credit or other improvement security in an amount
deemed sufficient by City to cover all costs of improvements, landscaping,
maintenance of improvements for such a period as specified by the
City and engineering and inspection costs to cover the cost of failure
or repair of improvements installed on the site.
[Ord. No. 1548 §1, 12-4-2006]
A.
Erosion And Sediment Control Plan Content. Grading plans
for grading operations in excess of five hundred (500) cubic yards,
site plans, preliminary plat of subdivision or the subdivision improvement
plan shall include the following additional information:
1.
Erosion and Sediment Control Plans submitted to the City shall include
two (2) sets of maps and plans with specifications showing proposed
excavation, grading or filling and will include the following:
a.
Full name and address of property owner;
b.
Designation of property address;
c.
Portion of the property that is to be excavated, graded or filled
with excavation material;
d.
Location of any sewerage disposal system or underground utility line,
any part of which is within fifty (50) feet of the proposed excavation,
grading or filling area and the location of any gas transmission pipeline
operated at a maximum service pressure in excess of two hundred (200)
psig, any part of which is within one hundred (100) feet of the proposed
excavation, grading or filling area;
e.
Existing grade and topography of the premises and the proposed finished
grade and final contour elevation at a contour interval of not more
than two (2) feet;
f.
Location and present status of any previous permitted grading operations
on the property;
g.
Details of any drainage system proposed to be installed and maintained
by the applicant and a comprehensive drainage plan designed to safely
handle surface water, streams or other natural drains following heavy
rains during grading operations;
h.
Details of proposed water impoundment structures, embankments, sediment
basins, grass or lined waterways and diversions with the details and
locations of proposed stable outlets;
i.
Details of soil preparation and revegetation of the finished grade
and of other methods of soil erosion control;
j.
Proposed truck and equipment access ways to the work site;
k.
Delineation of the 100-year floodplain;
l.
A statement from the property owner or his agent assuming full responsibility
for the performance of the operation as stated in the application.
This statement shall also contain assurance that all Oak Grove property
or roads will be adequately protected.
2.
The proposed phasing of the development of the site, including clearing,
rough grading and construction and final grading and landscaping.
Phasing should identify the date which clearing will begin, the estimated
duration of exposure of cleared areas and the sequence of clearing,
installation of temporary sediment control measures, installation
of storm drainage, paving streets and parking areas and establishment
of temporary and permanent vegetative cover. The City may waive specific
requirements of the content of submissions upon findings that the
information submitted is sufficient to show that the work will comply
with the objectives and the principles of this Chapter.
B.
Plan Approval. All non-agricultural grading operation in
excess of five hundred (500) cubic yards and no final plat of subdivision
shall be recommended for approval by the City unless the preliminary
plat and Erosion and Sediment Control Plans indicate that measures
to be taken will meet the erosion control standards contained within
this Chapter.
[Ord. No. 1548 §1, 12-4-2006]
A.
Grading,
erosion control practices, sediment control practices and waterway
crossings shall meet the design criteria set forth in the latest version
of the Kansas City Metropolitan Chapter of the American Public Works
Association (APWA) Section 5100 Erosion and Sediment Control Specifications
and Design Standards and Section 5600 Storm Drainage Systems and Facilities
Specifications and Design Standards shall be adequate to prevent transportation
of sediment from the site to the satisfaction of the City.
B.
Grading
plans for sites that exceed (one (1) acre) shall provide for sediment
basins, silt traps or filters, staked straw bales or a combination
of these measures to remove sediment from runoff waters. The design
shall be approved by the designated official. Temporary control measures
shall be maintained until vegetative cover is established at a sufficient
density to provide erosion control on the site.
C.
All
finished grades (areas not to be disturbed by future improvement)
in excess of twenty percent (20%) slopes (5:1) shall be hydro-seeded
and mulched at the rate of one hundred (100) pounds per one thousand
(1,000) square feet when seeded.
D.
Provisions
shall be made to accommodate the increased runoff caused by changed
soil and surface conditions during and after grading. Unvegetated
open channels shall be designed so that gradients result in velocities
of two (2) fps (feet per second) or less. Velocities in permanent
vegetation by use of commercial erosion control blankets or lined
with rock riprap or concrete or other suitable materials as approved
by the City. Detention basins, diversions or other appropriate structures
shall be constructed to prevent velocities above five (5) fps.
E.
Development
along natural watercourses shall have residential lot lines, commercial
or industrial improvements, parking areas or driveways set back a
minimum of twenty-five (25) feet from the top of the existing stream
bank. The watercourse shall be maintained and made the responsibility
of the appropriate legal entity. Permanent vegetation shall be left
intact. Variances will include designed stream bank erosion control
measures and shall be approved by the City. FEMA guidelines shall
be followed where applicable regarding site development in floodplains.
F.
Clearing,
except that necessary to establish sediment control devices, shall
not begin until all sediment control devices have been installed and
have been stabilized.
G.
Phasing
shall be required on all sites disturbing greater than ten (10) acres,
with the size of each phase to be established at plan review and as
approved by the City.
H.
Erosion Control Requirements. Any development occurring
within the City of Oak Grove shall require an erosion control plan
containing BMPs for that development. This erosion control plan shall
be submitted to the City's Engineer for review and approval, once
approved they shall be strictly enforced by the City. If an erosion
control plan has not been submitted to the City for approval by the
City's Engineer then the following guidelines shall be enforced by
the City for that development.
1.
Soil stabilization shall be completed within fourteen (14) days of
clearing or inactivity in construction.
2.
If seeding or another vegetative erosion control method is used,
it shall become established within two (2) weeks or the MDNR may require
the site to be reseeded or a non-vegetative option employed.
3.
When grading operations are completed or suspended for more than
thirty (30) days between permanent grass seeding periods, temporary
cover shall be provided to the City's recommendation.
4.
Special techniques that meet the design criteria outlined in the
Erosion and Sediment Control Specifications and Design Standards (APWA)
on steep slopes or in drainage ways shall be used to ensure stabilization.
5.
Soil stockpiles must be stabilized, using a heavy mulch layer or
another method that does not require germination to control erosion,
at the close of the construction season.
6.
Techniques shall be employed to prevent the blowing of dust or sediment
from the site.
7.
Techniques that divert upland runoff past disturbed slopes shall
be employed.
8.
All lots shall be seeded and mulched or sodded before an occupancy
permit shall be issued except that a temporary occupancy permit may
be issued by the Building Inspector in cases of undue hardship because
of unfavorable ground conditions.
I.
Sediment
controls requirements shall include:
1.
Settling basins, sediment traps or tanks and perimeter controls.
2.
Settling basins that are designed in a manner that allows adaptation
to provide long term stormwater management, if required by the City.
3.
Protection for adjacent properties by the use of a vegetated buffer
strip in combination with perimeter controls.
J.
Waterway
and watercourse protection requirements shall include:
1.
A temporary stream crossing installed and approved by the City if
a wet watercourse will be crossed regularly during construction.
2.
Stabilization of the watercourse channel before, during and after
any in-channel work.
3.
All on-site stormwater conveyance channels designed according to
the criteria outlined in Section 5600 Storm Drainage Systems and Facilities
Specifications and Design Standards.
4.
Stabilization adequate to prevent erosion located at the outlets
of all pipes and paved channels.
K.
Construction
site access requirements shall include:
1.
A temporary access road provided at all sites prior to any land disturbance
to minimize curb damage and mud deposits on the streets. Said temporary
access paths shall be rocked to a minimum depth of six (6) inches.
An underlayment of stabilization fabric is required to keep the rock
from becoming saturated with mud. Note, for residential lots temporary
driveways are to be rocked immediately after foundation walls are
back-filled and before the sub-floor is installed. All deliveries
of material to the construction site shall be required to use the
temporary driveway.
2.
No land disturbing, construction or other associated activities are
permitted that cause mud, soil, earth, sand, gravel, rock, stone,
concrete, building materials or other materials to be deposited on
public streets. Trucks and other construction equipment shall be cleaned
on site to prevent mud from being deposited on public streets.
