[Ord. No. 481, 5-13-2013]
This Chapter shall hereafter be known, cited and referred to
as the "Stormwater Management Code of the Village of Country Club,
Missouri."
[Ord. No. 481, 5-13-2013]
The provisions of this Chapter shall extend and apply to all
land within the corporate limits of the Village. Any person, firm,
corporation or business proposing to construct buildings or develop
land within the above-described area shall make application to the
Village for approval of a stormwater management plan and issuance
of a drainage permit as specified in this Chapter.
[Ord. No. 481, 5-13-2013]
The provisions of this Chapter are intended to supplement existing
Zoning and Land Use Ordinances of the Village of Country Club. In
their interpretation and application, the provisions herein shall
be held to be the minimum requirements for the promotion of the public
health, safety and general welfare.
[Ord. No. 481, 5-13-2013]
To promote the public health, safety and general welfare of
the citizens of Village of Country Club, this Stormwater Management
Chapter is enacted for the general purpose of assuring the proper
balance between man's use of land and the preservation of a safe and
beneficial environment. More specifically, the provisions of this
Chapter, as amended from time to time, are intended to reduce property
damage and to minimize the hazards of personal injury and loss of
life due to flooding.
[Ord. No. 481, 5-13-2013]
This chapter shall not be construed as abating any action now
pending under or by virtue of prior existing regulations, or as discontinuing,
abating, modifying or altering any penalty accruing or about to accrue,
or as affecting the liability of any person, firm or corporation,
or as vacating or annulling any rights obtained by any person, firm,
or corporation, by lawful action of the Village, except as shall be
expressly provided for in this chapter.
[Ord. No. 481, 5-13-2013]
The performance standards and design criteria set forth herein
establish minimum requirements which must be implemented with good
engineering practice and workmanship. Use of the requirements contained
herein shall not constitute a representation, guarantee or warranty
of any kind by the Village, or its officers and employees, of the
adequacy or safety of any stormwater management structure or use of
land. Nor shall the approval of the stormwater management plan and
the issuance of a drainage permit imply that land uses permitted will
be free from damages caused by stormwater runoff. The degree of protection
required by this chapter is considered reasonable for regulatory purposed
and is based on historical records, engineering and scientific methods
of study. Larger storms may occur or stormwater runoff heights may
be increased by man-made or natural causes. This chapter, therefore,
shall not create liability on the part of the Village or any officer
with respect to any legislative or administrative decision lawfully
made hereunder.
[Ord. No. 481, 5-13-2013]
If any part or provision of this chapter or application thereof
to any person or circumstances is adjudged invalid by any court of
competent jurisdiction, such judgment shall be confined in its operation
to that part, provision, or application directly involved in the controversy
in which such judgment shall have been rendered and shall not affect
or impair the validity of the remainder of this chapter or the application
thereof to other persons or circumstances. The governing body hereby
declares that it would have enacted the remainder of this chapter
even without any such part, provision, or application found to be
unlawful or invalid.
[Ord. No. 481, 5-13-2013]
A.
For the purpose of this Chapter, the words and terms as used herein
are defined to mean as set out in this Chapter.
B.
Words used in the present tense include the future; words in the
singular number include the plural, and words in the plural number
include the singular; the word "building" included the word "structure"
the word "shall" or the word "must" is mandatory; the term "used for"
includes the meaning "designated for" or "intended for".
C.
CHANNEL
DETENTION
DEVELOPMENT
DIFFERENTIAL RUNOFF
DRAINAGE PERMIT
DRY BOTTOM BASIN
FLOODPLAIN
FLOODWAY
FREEBOARD
ONE-HUNDRED-YEAR STORM
PLAT
STORMWATER RUNOFF
TEN-YEAR STORM
TRIBUTARY AREA
WATERCOURSE
WET BOTTOM BASIN
As used in this Chapter, the following terms shall have the meanings
indicated:
A watercourse of perceptible extent which periodically or
continuously contains moving water or which forms a connecting link
between two (2) bodies of water.
A stormwater management technique the primary function of
which is to control the peak rate of surface water runoff by utilizing
temporary storage and a controlled rate of release. This may include,
but not be limited to, the use of reservoirs, rooftops, parking areas,
holding tanks, in-pipe and in-channel storage.
Any man-made change to improved or unimproved real property,
including the construction or reconstruction of buildings or structures;
paving, excavation, grading, filling or similar operations; or the
filing and recording of a subdivision plat.
The volume and rate of flow of stormwater runoff discharged
from a parcel of land or drainage area which is or will be greater
than that volume or rate which pertained prior to the proposed development
or redevelopment.
A permit issued by the Building Official subsequent to approval
of a final stormwater management plan by the Clerk.
A natural or artificial stormwater storage area that is designed
and maintained for temporary containment of stormwater runoff.
A land area adjoining a river, stream, watercourse, or lake
which is likely to be flooded in a one-hundred year flood, as designated
on the Federal Insurance Rate Map (FIRM) by the Federal Emergency
Management Agency, a copy of which is on file in the office of the
Village Clerk.
The channel of a watercourse and the adjacent land area that
must be reserved in order to discharge a one-hundred-year flood without
cumulatively increasing the water surface elevation more than one
and zero-tenths (1.0) foot, and as designated on the Flood Boundary
and Floodway Map by the Federal Emergency Management Agency, a copy
of which is on file in the office of the Village Clerk.
A factor of safety expressed as the difference in elevation
between the top of the detention basin dam and the maximum design
surface water elevation resulting from the storm for which the basin's
required storage volume was determined.
A rainstorm having a one-percent chance of being equaled
or exceeded in any given year.
A legally recorded plan of a parcel of land showing the location
and dimension of such features as streets, lots, easements, and other
elements pertinent to a subdivision.
Water resulting from precipitation which is not absorbed
by the soil, evaporated into the atmosphere, or entrapped by ground
surface depressions and vegetation and which flows over the surface.
A rainstorm of one-hour duration that will occur on the average
of once in ten (10) years.
All of the area contributing stormwater runoff to a given
point.
Any stream, creek, brook, branch, depression, reservoir,
lake, pond, or drainageway in or into which stormwater runoff flows.
A stormwater storage area which is designed and maintained
to contain water temporarily and to hold permanently an additional
volume of water at a level below the discharge structure of said storage
area.
[Ord. No. 481, 5-13-2013]
A.
General. This Chapter establishes the stormwater
management system which shall be composed of a major system, a minor
system, management controls, and management practices. This chapter
shall apply in the minor system.
B.
The Major System. The major system shall be composed
of the regulatory floodplain as shown on the National Flood Insurance
Program maps as developed for the Village of Country Club by the United
States Department of Housing and Urban Development, Federal Insurance
Administration. All components of the major system shall be designed
to handle the system shall be designed to handle the one-hundred-year
rainfall event.
C.
The Minor System. The minor system shall consist
of storm drainage facilities, including, but not necessarily limited
to, roadway curb and gutter, open channels, swales and enclosed conveyance
systems which transport storm runoff to the major system (regulatory
floodplain). Minor system facilities are those designed to accommodate
runoff resulting from a storm with a given design frequency.
D.
Management Controls.
1.
Management controls are regulations applicable to the minor
system under the provisions of this Chapter. Such controls shall limit
any activity which will adversely affect hydraulic function of detention
facilities, open channels, drainage swales, or enclosed stormwater
conveyance systems contained within the minor system as previously
defined.
2.
Exceptions to the applicability of the use of management controls
for new developments shall be granted in the following situations:
a.
Existing lots of record zoned single-family.
b.
Additions to, improvements or repair of existing single-family
and duplex dwelling structures.
c.
Additions to, improvements or repair of existing commercial
structures so long as there is no change in impervious surface area.
d.
On sites where stormwater runoff discharges directly into a
major stream or system component, as determined by the Village, and
such controls would serve no useful purpose.
e.
On land used for agricultural purposes where no change in grade
over that which has existed historically will take place.
f.
Construction of any buildings or structures on a site which
has been previously included with stormwater management control facilities
as part of a larger unit of development.
[Ord. No. 481, 5-13-2013]
A.
Administration. The administration of this chapter
shall be the responsibility of the Village, who shall review and approve
Stormwater Management Plans as provided herein.
B.
Private Responsibilities. Each developer of land
within the Village has the responsibility to provide on the developer's
property all approved stormwater runoff management facilities to ensure
the adequate drainage and control of stormwater on the developer's
property both during and after construction of such facilities.
[Ord. No. 481, 5-13-2013]
A.
Operation And Maintenance of Publicly Owned Facilities. The Village of Country Club shall be responsible for the maintenance
of all drainage structures and improved watercourses which are publicly
owned. No dedications to the public may be made without approval of
the Village.
B.
Stormwater runoff control facilities, including open drainage swales,
channels, enclosed systems and detention/retention structures, architectural
screenings and decorative shrubbery and plantings, on or adjacent
to and abutting privately owned property and not under Village ownership
shall be maintained by the owner, occupant or agent in charge of such
property. Such maintenance shall include, but not be limited to, keeping
said facilities free and clear of weeds, brush, vegetative growth
(except decorative shrubbery and plantings) having a height of not
more than twelve (12) inches, debris and any other waste material
which might impede or hinder the facilities intended use.
C.
Failure To Maintain. If the Village determines that
the owner, occupant or agent in charge of any lot, piece or parcel
of land on which a drainage control structure exists, abuts or is
included in any approved storm management plan has failed to properly
maintain such facility as previously set forth, then he shall notify
the owner, occupant or agent in charge of the violation in writing.
If the owner, occupant or agent in charge fails, neglects or refuses
to comply with the requirements specified in the notice, the Village
shall proceed to cause the necessary remedial work to be performed
and shall report all costs of such remedial work to the Finance Director.
The Finance Director shall mail a statement of the actual costs plus
a penalty of one thousand dollars ($1,000.00) to the last known address
of the owner, occupant or agent in charge of the property, and if
such costs are not paid to the Village within ten (10) days of such
notice, the governing body of the Village shall proceed to pass an
ordinance levying a special assessment for such costs against the
property on which the facility exists, and all the private property
included in the approved stormwater management plan. The Village Clerk
shall certify such assessment to the County Clerk for collection and
payment to the Village the same as other assessments and taxes are
collected and paid. The assessments shall bear interest of at least
ten percent (10%) per annum on the unpaid balance.
[Ord. No. 481, 5-13-2013]
A.
The following practices may be utilized upon approval of the Village.
Use of these methods shall be fully in accordance with the design
criteria and performance standards as set forth in this Chapter:
1.
Storage. Runoff may be stored in temporary
or permanent detention basins, or through rooftop or parking lot ponding,
or percolation storage, or by other acceptable means.
2.
Open channels. Maximum feasible use shall be
made of existing drainageways, open channels, and drainage swales
that are designed and coordinated with the design of building lots
and streets.
3.
Streets and curbs. Streets, curbs, and gutters
shall be an integral part of the stormwater runoff management system.
To the maximum extent possible, drainage systems, street layout and
grades, lotting patterns and the location of curbs, inlets and site
drainage and overflow swales shall be concurrently designed in accordance
with the standards set forth in this chapter.
4.
Enclosed conveyance system. Enclosed conveyance
systems consisting of inlets, conduits, and manholes may be used to
convey stormwater runoff.
5.
Other. The stormwater runoff management practices
enumerated herein shall not constitute an exclusive listing of available
management practices. Other generally accepted practices and methods
may be utilized where approved by the Village.
[Ord. No. 481, 5-13-2013]
A.
General. No development shall increase the quantity
and rates of stormwater emanating from said land areas except in accordance
with an approved stormwater management plan as provided in this chapter.
The stormwater management plan shall be prepared by a person qualified
under provisions of State law in the State of Missouri.
B.
A preliminary stormwater management plan shall accompany
all applications for land development. Following the receipt of the
preliminary stormwater management plan, a general review meeting shall
be conducted and shall include the Village Clerk, Village Planner,
representatives of the developer and the developer's engineer. The
purpose of this review shall be to jointly agree on the conceptual
methods proposed to be utilized and the possible effects of the proposed
development on existing or future adjacent developments, and the need
for architectural or landscape features which will shield open detention
structures from the public right-of-way.
C.
Final Stormwater Management Plan.
1.
Following the review of the preliminary stormwater management
plan and after the general approval of the preliminary plan by the
Village, a final stormwater management plan shall be prepared for
each phase of the proposed project as each phase is developed. The
submittal of the final plan shall coincide with application for final
approval of the development and shall constitute a refinement of the
concepts approved in the preliminary plan. It is important to note
that if a project is to be phased, the total area of the conceptual
project is to be considered in all calculations and that facilities
should be designed for each phase which would be compatible with those
of the total development plan. The final stormwater management plan
shall specifically enumerate the private property responsible for
the maintenance of the stormwater control facilities and all appurtenances,
including architectural screenings and plantings, and shall include
all maps, calculations necessary for the approval of the plan by the
Village.
2.
The final stormwater management plan shall be reviewed by the
Village. If it is determined that the proposed development will provide
control of stormwater runoff in accordance with the purposes, design
criteria and performance standards of this chapter and will not be
detrimental to the public health, safety, and general welfare, the
Village shall approve the plan or conditionally approve the plan,
setting forth in writing, the conditions thereof. If approved, a drainage
permit for the development shall be granted.
3.
If it is determined that the proposed development will not control
stormwater runoff in accordance with this chapter, the Village shall
disapprove the stormwater management plan and the application and
data shall be returned to the applicant for corrective action and
resubmittal.
[Ord. No. 481, 5-13-2013]
A.
Unless otherwise approved, the following rules shall govern the design
of improvements with respect to managing stormwater runoff:
1.
In determining the amount of stormwater runoff from a development
it is important for the designer to relate the methodology to be used
in his calculations to the proportionate size of the tributary watershed
area. In developments of twenty-five (25) acres or less, the Rational
Method of calculating the quantity of runoff shall be used. Optionally,
in developments of twenty-five (25) acres or less, those persons not
wishing to calculate the quantity of water to be retained may use
the attached tabular form.[1] Developments where the area developed is greater than
twenty-five (25) acres and up to two hundred (200) acres shall be
designed using the Unit Hydrograph Method. The preferred method of
hydrograph development shall be as described in the Soil Conservation
Service publication "Urban Hydrology For Small Watersheds" (Technical
Release No. 55 - June 1986). Use of methods other than those described
shall be upon the approval of the Village.
[1]
Editor's Note: This table is included as an attachment to this chapter.
2.
Development design. Streets, blocks, depth
of lots, parks, and other public grounds shall be located and laid
out in such a manner as to minimize the velocity of overland flow
and allow maximum opportunity for infiltration of stormwater into
the ground, and to preserve and utilize existing and planned streams,
channels and detention basins, and include, whenever possible, streams
and floodplains within parks and other public grounds.
3.
Enclosed systems and open channels. The design
criteria for storm drainage facilities, shall be submitted to and
approved by the Village.
4.
Methods of controlling downstream flooding.
The Village shall determine whether the proposed plan will cause or
increase downstream local flooding conditions. This determination
shall be made on the basis of existing downstream development and
drainage system capabilities and an analysis of stormwater runoff
prior to and after the proposed development. If the Village determines
that the proposed development will cause or increase downstream local
flooding conditions during the design storm, provisions to minimize
such flooding conditions shall be included in the design of storm
drainage improvements and/or the temporary controlled detention of
stormwater runoff and its regulated discharge to the downstream storm
drainage system.
5.
Downstream improvements. Improvements to minimize
downstream flooding conditions may include, but not be limited to,
the construction of dams, dikes, levees, and floodwalls; culvert enlargement;
and channel clearance and modification projects.
6.
Detention basins. Temporary detention of stormwater
runoff may be used in developments in order to minimize downstream
flooding conditions. Temporary storage facilities will not be required
in situations where the installation of such a facility would adversely
affect the environment or where the site discharges directly into
a major stream or system component. The design of temporary detention
facilities shall be in accordance with the following design criteria:
a.
Storage volume requirements.
(1)
Sufficient storage volume shall be provided to prevent local flooding damage. Such volume shall be adequate to contain the differential volume of runoff which would result from the design storm occurring on a fully developed site minus the volume of runoff which would result from the design storm occurring over an undeveloped site. Inflow rates into the storage basin shall be determined utilizing either the Rational Method or the Unit Hydrograph Method dependent on the development size limitations and methodologies described in Subsection (A)(1) of this Section. The minimum rainfall event to be utilized in determining the detention storage volume shall be based on the twenty-five-year rainfall event.
(2)
When utilizing the SCS method of hydrograph development
(Technical Release No. 55), the minimum rainfall events shall be based
upon the twenty-four-hour point rainfall as indicated in Technical
Paper No. 40, published by the Department of Commerce, Weather Bureau.
(3)
In the event of special circumstances, the Village
may require the use of storms of greater magnitude. When utilizing
the Rational Method for runoff computations, the rainfall intensity
(I) and runoff coefficient (C) shall be based upon the area being
fully developed in accordance with the planned land usage.
(4)
Associated with the analysis will be the routing
of the storm hydrograph through the basin to determine the effect
of the temporary storage on the rate of inflow. As a result of the
flood routing procedure, a determination of the required combination
to temporary storage volume and outlet controls required to reduce
post-development peak outflows to no more than the rate may be made.
b.
Maximum allowable release rate.
(1)
The basic design factor used in the determination
of the maximum release rate of a detention facility shall be the capability
of the downstream system to handle the flow adequately. In general,
the maximum release rate shall be defined as the predevelopment runoff
resulting from a ten-year return frequency rainfall calculated using
the Rational Formula:
|
Q = CIA
|
|
Where:
| ||||
|
Q
|
=
|
Peak rate of runoff, in cubic feet per second.
| ||
|
C
|
=
|
Weighted runoff coefficient (average of the coefficient assigned
to the different types of contributing areas).
| ||
|
I
|
=
|
Average rainfall intensity, in inches per hour, for the selected
frequency and for duration equal to the time of concentration.
| ||
|
A
|
=
|
Drainage area, in acres, of the subject property, tributary
to point under design.
| ||
(2)
Deviations from the use of this rainfall frequency
in design calculations shall be only where approved by the Village.
Actual rainfall intensity (I) shall be determined for the time of
concentration of the tributary area in its undeveloped and natural
state. The runoff coefficient (C) shall likewise be determined for
the land in its undeveloped state. In no case shall the release rate
exceed the existing safe storm drainage capacity of the downstream
system or watercourse.
c.
Freeboard. The minimum elevation of the top
of the detention storage basin embankment shall be at least one (1)
foot above the water surface with the emergency spillway flowing at
design, or a minimum of two (2) feet above the crest of the emergency
spillway.
d.
Sediment storage. A sediment storage volume
of at least five percent (5%) of the total required temporary storage
volume for runoff detention shall be provided.
e.
Outlet control works. Outlet works shall not
include any mechanical components or devices and shall function without
requiring attendance or control during operation. Size and hydraulic
characteristics shall be such that all water in detention storage
is released to the downstream storm sewer system within twenty-four
(24) hours after the end of the design rainfall.
f.
Emergency overflow. A method of emergency overflow
shall be designed and provided to permit the safe passage of runoff
generated in excess of a one-hundred-year storm.
g.
Other design considerations. All stormwater
detention basins shall be designed with the capability of passing
a one-hundred-year hydrograph from a fully developed watershed basin
through the outlet works without causing a failure of the embankment.
It is not the intent of this requirement to entail any additional
reduction of the integrity and safety of the structure.
h.
Design data submittal. In addition to complete
plans, the following design data shall be submitted for all temporary
detention facilities:
(1)
Rainfall hydrograph plotted in units of inches
per hour as ordinates, and time from beginning of the storm as abscissas.
(2)
Runoff hydrograph plotted in units of cubic feet
per second runoff rate of the tributary area as ordinates, and time
from the start of runoff as abscissas.
(3)
Area - capacity curve for proposed detention facility
plotted in units of datum elevation as ordinates, and cumulative volume
of storage as abscissas.
(4)
Discharge characteristics curve or outlet works
plotted in units of detention facility water surface elevation as
ordinates, and discharge rate for cubic feet per second (cfs) as abscissas.
(5)
Storage capacity-Inflow and outflow curves in units
of accumulated volume as ordinates, and time from the start of runoff
as abscissas. Curves shall be so arranged that the vertical distance
between the accumulated storage and accumulated discharge will indicate
the net volume in storage at any point in time. Curves shall be extended
to the time required for complete discharge of all runoff stored in
the detention facility.
7.
Other detention methods.
a.
In addition to the above criteria, the following detention methods
may be utilized to provide temporary detention storage:
(1)
Wet bottom basins. The minimum
normal depth of water before the introduction of excess stormwater
shall be four (4) feet. If fish are to be used to keep the basin clean,
at least one-fourth (1/4) of the area of the permanent pool must have
a minimum depth of ten (10) feet. For emptying purposes, cleaning
or shoreline maintenance, facilities shall be provided or plans prepared
for the use of auxiliary equipment to permit emptying and drainage.
All surface area within the fluctuating limits of the basin storage
or that which is susceptible to or designed as overflow areas from
storms with a higher return frequency than those utilized in the design
of the facility shall be seeded and mulched, sodded or paved.
(2)
Dry bottom basins. Where possible,
these shall be designed to serve secondary purposes for recreation,
open space or other types of use which will not be adversely affected
by occasional or intermittent flooding. To facilitate interior drainage,
pave with concrete. Architectural screenings and/or plantings are
required for this type of facility unless specifically excluded by
Council action.
(3)
Rooftop storage. Detention storage
may be met in total or in part by detention on roofs. Details of such
designs, which shall be included in the drainage permit applications,
shall include the depth and volume of storage, details of outlet devices
and downdrains, elevations of overflow scuppers, design loadings for
the roof structure and emergency overflow provisions.
(4)
Paved parking lots. May be designed
to provide temporary storage of stormwater on all or a portion of
their surfaces to a maximum depth of nine (9) inches. Outlets will
be designed so as to empty the stored waters in such a time as to
create the least amount of inconvenience to the public. Minimum slopes
of one percent (1%) and maximum slopes of four percent (4%) are to
be utilized.
b.
The minimum freeboard from the maximum water ponding elevation
to lowest sill elevation of adjacent buildings or structures shall
be one (1) foot.
[Ord. No. 481, 5-13-2013]
A.
Stormwater Channel Location. Generally acceptable
locations of stormwater runoff channels in the design of a subdivision
may include but not be limited to the following:
1.
In a depressed median of a double roadway, street, or parkway,
provided that the median is wide enough to permit maximum three to
one (3:1) side slopes.
2.
Centered on back lot lines or entirely within the rear yards
of a single row of lots or parcels.
3.
In each of the foregoing cases, a drainage easement to facilitate
maintenance and design flow shall be provided and shown on the plat.
No structures will be allowed to be constructed within or across stormwater
channels.
B.
Storm Sewer Outfall. The storm sewer outfall shall
be designed so as to provide adequate protection against downstream
erosion and scouring.
C.
Lot Lines. Whenever the plans call for the passage
and/or storage of floodwater, surface runoff, or stormwater along
lot lines, the grading of all such lots shall be prescribed and established
for the passage and/or storage of waters. No structure may be erected
in these areas which will obstruct the flow of stormwater. Additionally,
installation of fences and the planting of shrubbery or trees within
the areas will not be permitted. Changes in the grade and contours
of the floodwater or stormwater runoff channels will not be permitted
unless approved in writing by the Village.
D.
Manholes. All sanitary sewer manholes constructed
in a floodplain or in an area designed for the storage or passage
of floodwater or stormwater, shall be provided with either a water-tight
manhole cover or be constructed with a rim elevation of the design
storm, whichever is applicable to the specific area.
E.
Easements. Permanent easements for the detention
and conveyance of stormwater, including easements of access to structures
and facilities, shall be dedicated to the public.
F.
Drainage Permits. A drainage permit for projects
including detention facilities can be granted by the Building Official
only after the final stormwater management plan has been approved
by the Village and all covenants and easements have been dedicated,
accepted, and recorded, and all required maintenance assurances and
required bonds have been executed.
[Ord. No. 481, 5-13-2013]
A.
General.
1.
Prior to the approval and recording of the final subdivision
or land development plan, a plan depicting proposed site grading within
the development shall be submitted to the Village for review and approval.
2.
For major subdivision developments consisting of more than ten
(10) lots, the grading plan shall be accompanied by a detailed sedimentation
and erosion control plan.
3.
Stripping of vegetation or earth moving shall not be permitted
nor will building permits be issued prior to approval of this plan
by the Village.
4.
Sediment and erosion control plan. In major
developments, or as specifically required by the Village, a detailed
sediment and erosion control plan shall accompany all grading plan
applications. The implementation of the approved plan shall be concurrent
with site grading activities for the proposed development and shall
remain in effect until the completion of the subdivision or development.
The plan submitted shall address the type and characteristics of the
soils within the development and an indication shall be made of the
potential erodability of the site during construction operations.
Methods to prevent sedimentation and erosion of the site shall include,
but not be limited to, chemical treatment of the soil, siltation basins,
mulches and netting.
B.
Grading Plan (Subdivision). The grading plan shall
be prepared by a person qualified under provisions of state law in
the State of Missouri. The contents of the plan shall include but
not be limited to the following information:
1.
Contours of existing grades at intervals not more than five
(5) feet. Intervals less than five (5) feet may be required dependent
on the character of the topography.
2.
Property lines identified as to existing or proposed lot and
block number.
3.
Elevation and location of nearest bench mark (U.S.G.S. datum).
4.
Final grading contours drawn at sufficient intervals of not
more than five (5) feet to depict major subdivision drainage patterns.
In addition, final grading spot elevations shall be shown for all
corners of each lot. Such corner elevations shall be general in nature
and upon approval of the Village may be revised at the time of plot
plan submittal.
5.
One-hundred-year floodplain line with elevation.
6.
Easement and right-of-way information including drainage easements
required for off-site drainageways.
7.
Existing or proposed utility information.
C.
Grading Plan (Individual Lots).
1.
Applications for individual building permits shall be accompanied
by a specific grading plan for that lot. Such grading plan shall be
incorporated into the plot plan and shall contain as a minimum, the
following information:
a.
Property lines identified as to existing or proposed lot and
block number.
b.
Proposed location of structure.
c.
Proposed type of structure (i.e., bi-level, split-level, etc.).
d.
Elevations of the top of foundation, proposed grade at principal
structure corners and at lot corners.
e.
Approximate location of drainage swales indicated by directional
arrows depicting flow patterns. Spot elevations may be utilized in
lieu of arrows.
2.
Additional information may be required by the Village to assure
protection of adjacent property.
[Ord. No. 481, 5-13-2013]
A two-year maintenance bond against defects in workmanship will
be required by the Village for any portion of the stormwater management
improvements dedicated to the public.
[Ord. No. 481, 5-13-2013]
Upon approval of the stormwater management plan by the Village,
and acceptance of the applicant's assurances of performance and maintenance
as provided in this chapter, the Building Official shall issue a drainage
permit. The permit shall set forth the terms and conditions of the
approved stormwater management plan.
[Ord. No. 481, 5-13-2013]
Those wishing to occupy a development without completing the
construction in conformance with the approved final stormwater management
plan shall deposit with the Building Official a performance bond,
cash escrow, certified check, or other acceptable form of performance
security for the full amount of the work to be done as determined
by the Village. Only upon completion of the construction in conformance
with the approved final stormwater management plan, shall an occupancy
permit be issued.
[Ord. No. 481, 5-13-2013]
Any person aggrieved by any final decision of the Village may
seek review by a court of competent jurisdiction in the manner provided
by the laws of the State of Missouri.
[Ord. No. 481, 5-13-2013]
A.
The violation of any provision of this Chapter is a misdemeanor.
Any person, firm, association, partnership or corporation convicted
shall be subject to a fine not to exceed five hundred dollars ($500.00);
and the Village of Country Club, Missouri, shall further have the
authority to maintain suits or actions in any court of competent jurisdiction
for the purpose of enforcing any provisions of this thereof; and in
addition to other remedies, institute injunction, mandamus, or other
appropriate action or proceeding to prevent such unlawful erection,
construction, reconstruction, alteration, conversion, maintenance,
or use, or to correct or abate such violation, or to prevent the occupancy
of the building, structure, or land. Each day any violation of this
Chapter shall continue shall constitute a separate offense. Additionally,
the Building Official may, upon ten (10) days' written notice, revoke
the occupancy permit issued or to withhold the issuance of any building
permit for any or all premises for which the facility exists, abuts
or purports to support in the approved stormwater management plan
or in the alternative, may order utilities disconnected. Nothing in
this Section shall prevent the Director of Health and Welfare from
exercising his authority in relation to nuisances.
B.
Notwithstanding any other provision of this Chapter, whenever any
property, based on the latest revision of this policy, is determined
to need stormwater detention facilities which have a capacity of less
than one thousand (1,000) cubic feet, the developer may pay to the
Village, in lieu of constructing required stormwater detention facilities,
not less than one dollar ($1.00) for each cubic foot of required detention.
This money shall be used by the Village to construct drainage improvements
within the drainage basin where the stormwater facilities should have
been constructed. A waiver of the detention facility requirement may
not be allowed if the Village has made a finding that there is a significant
drainage problem below the property where the waiver is proposed even
though the detention facility is marginally efficient. The Village
may consider in making such determination that the discharge of any
additional waters at an increased rate onto the properties below is
not desirable due to significant drainage problems that exist on subservient
properties. Annually in July, the payment in lieu of construction
fee shall be revised by the Village to reflect the annual percentage
change in construction cost by using the Construction Price Index,
increase or decrease, from the previous twelve (12) months. The first
adjustment shall be in July 1990.
C.
Notwithstanding any other provision of this Chapter, whenever any
property, based on the latest revision of this policy, is located
in the upper one-third (1/3) (elevationwise) of the watershed the
developer may make application for payment in lieu thereof as provided
for in the preceding Subsection. If it is determined by the Village
that such development without controls is not detrimental to downstream
properties, the Director may approve such application. Nothing in
this Subsection shall relieve the engineer from providing sufficient
calculation, drawings and submittals to the satisfaction of the Director
that such uncontrolled release is not detrimental.
D.
Notwithstanding any other provision of this Chapter, whenever any property, based on the latest revision of this policy, is located in the lower one-third (1/3) (elevationwise) of the watershed, the developer shall make application for payment in lieu thereof as provided for in the preceding Subsection (B). If it is determined by the Village that such development without controls is not detrimental to downstream properties, the Director may approve such application. Nothing in this Subsection shall relieve the engineer from providing sufficient calculation, drawings and submittals to the satisfaction of the Director that such uncontrolled release is not detrimental.
[Ord. No. 481, 5-13-2013]
A.
A soil erosion control plan shall accompany all applications for
land disturbance permits. The purpose of the plan is to clearly establish
what measures will be taken to prevent erosion and off-site sedimentation
during and after development. The erosion control plan shall consist
of two (2) parts: a site grading and drainage plan and a narrative
report describing the nature and scope of the work. The plan shall
be prepared and certified by a registered professional engineer, licensed
in the State of Missouri, except where expressly authorized by the
Village of Country Club.
B.
Erosion and sedimentation control measures must be designed to provide
protection pursuant to the Village's Stormwater Policy and the standards
contained in the most current version of Protecting Water Quality,
A Field Guide to Erosion, Sediment and Stormwater Best Management
Practices for Development Sites in Missouri and Kansas, November 1995.
C.
All surfaces must be stable and non-erosive within the lesser of
thirty (30) working days or ninety (90) calendar days after final
completion of the work authorized by the land disturbance permit.
When such work is associated with the construction of a building,
no certificate of occupancy shall be issued until such surfaces are
stable and non-erosive. If completion of the work or building is at
such time of the year that stabilization with ground cover is not
possible, a performance bond or other acceptable financial instrument
for completion of the work may be accepted to allow the issuance of
a certificate of occupancy.
D.
Applicability. This section applies to the following
sites of land development or land disturbing activities.
1.
Sites requiring a subdivision plat approval or the construction
of a house or houses or commercial, industrial or institutional buildings
on lots of approved subdivision plats;
2.
Sites requiring a certified survey approval or the construction
of dwellings or commercial, industrial or institutional buildings
on lots of approved certified surveys;
3.
Sites involving grading, removal of protective ground cover
or vegetation, excavation, land filling or other land-disturbing activity
affecting a surface area of one thousand (1,000) square feet or more;
4.
Any land-disturbing activity that will affect an area of five
hundred (500) square feet if the activity is within twenty-five (25)
feet of a river, stream, lake, watercourse, or wetland.
5.
Sites involving excavation of filling or a combination of excavations
and filling affecting four hundred (400) cubic yards or more of dirt,
sand or other excavation of fill material;
6.
Sites involving street, highway, road, or bridge construction,
enlargement, relocation or reconstruction;
7.
Sites involving the laying, repairing, replacing or enlarging
of an underground pipe, cable, or facility for a distance of three
hundred (300) feet or more;
8.
Sites involving the installation of any underground utilities
for a distance of three hundred (300) feet or more.
E.
Exceptions:
1.
Cutting brush where ground cover will remain intact.
2.
Maintenance of public infrastructure by state or local government
agencies. State and local government agencies, however, shall implement
best management practices to prevent erosion and control sediment
and shall make regular inspections to ascertain that erosion and sediment
control measures consistent with best management practices have been
implemented and are being effectively maintained.
3.
Emergency measures taken to clear roadways or to save endangered
property.
4.
Farming practices.
[Ord. No. 481, 5-13-2013]
A.
The site grading and drainage plan shall include the following:
1.
Existing features.
a.
A drainage area map showing topography of the entire drainage
basin(s) contributing to the site. The scale of the map shall be no
smaller than one (1) inch equals two hundred (200) feet for drainage
areas up to five hundred (500) acres. A topographic map of appropriate
scale shall be provided for larger areas upstream from the design
area. The drainage map is to show total acreage of the site and the
acreage of all drainage areas contributing to the site.
b.
A site plan having a scale no smaller than one (1) inch equals
one hundred (100) feet and existing contour intervals of not more
than five (5) feet. The plan shall show topographic features such
as highways, utilities, natural watercourses, existing drainage facilities
and structures, adjacent property lines, North arrow, scale, and vicinity
map. The site plan must also show the limits of the adopted one-hundred-year
floodplain on the site and any critical environmental areas, such
as streams, lakes, ponds and wetlands. Area and geologic types of
predominate soils as well as the nature and extent of existing vegetation
shall also be shown on the plan.
2.
Proposed alterations of the site.
a.
A plan drawing that shows the limits of clearing and grading,
cuts and fills, and final contours at not more than two-foot intervals.
The plan shall identify the phasing of the grading, showing the area(s)
to be denuded and the maximum time those areas will remain disturbed
[not to exceed the lesser of thirty (30) working days or ninety (90)
calendar days after completion of the work]. The plan shall show areas
to be used for storage of topsoil and excavated subsoil and plans
for access to the site during wet weather.
b.
A final site plan showing the location or relocation of all
utilities, planned streets, roads, buildings, parking lots and structures,
and all permanent stormwater management facilities.
3.
Temporary erosion and sediment control measures during
active construction. Drawings shall be provided showing types
of measures and facilities needed and the location of those measures
and facilities with dimensional details. All permanent deviations
in overland flow drainage patterns and the location of ingress and
egress points with the planned protection provisions are to be indicated.
4.
Permanent erosion and sediment control measures for
long-term protection.
a.
Drawings shall be provided showing types of measures and facilities
needed and the location of those measures and facilities with dimensional
details. All permanent deviations in overland flow drainage patterns
are to be indicated along with additional requirements pursuant to
the Village's Stormwater Management Policy.
b.
The ground immediately adjacent to the foundation shall be sloped
away from the building at a slope of not less than one (1) unit vertical
in twenty (20) units horizontal five-percent slope) for a minimum
of ten (10) feet measured perpendicular to the face of the wall, or
an approved alternate method of diverting water away from the foundation
shall be used. Grade fill shall come within four (4) inches of the
first course of masonry veneer and not more than six (6) inches from
all other finish materials.
B.
Narrative to Accompany Plan. The narrative report
describing the nature and scope of the work shall include the following:
[Ord. No. 578, 11-13-2018]
1.
The report shall briefly describe the overall project and shall
incorporate an explanation of existing, significant drainage problems
contributing to erosion and siltation problems, particularly those
that will be intensified by the alteration to the construction site.
2.
The report shall explain how the project design ensures that
the project does not promote or aggravate an existing off-site erosion,
siltation, or drainage problem. The narrative should include a description
of the effect of land disturbance activities off-site.
3.
Runoff-producing factors under existing conditions and the estimated
changes after construction must be provided.
4.
For design of the erosion control measures and facilities, the
report shall include calculations provided for in the Village's Stormwater
Management Policy.
5.
Long-range management of the erosion and siltation control facilities
must be addressed in the report.
6.
The phasing or staging of the land-disturbing activity is to
be described, including information on the sequence of land clearing
operations, specifying the maximum area and time span the area will
be left denuded, the provisions for the removal, protection and stockpiling
of soil, the types of major earth-moving and grading activities, dust
control measures, and the order of placement of control facility installations.
7.
Explanations for the selection of the erosion and siltation
control measures utilized shall be provided.
8.
A schedule shall be provided for inspection and maintenance of the
erosion and sediment control facilities to ensure maximum effectiveness
of the protective measures and to assure that preventive maintenance
efforts will be carried out when needed. The report should also include
a description of plans for resodding or reseeding of vegetated areas
and repair or reconstruction of damaged structural measures, and the
method and frequency of removal and disposal of waste materials removed
from the control facilities or project area, including the disposal
of temporary structural measures after they have served their purpose.
9.
The following provisions pertaining to foundations shall be
included in any report for a structure if such structure is to be
constructed below grade:
a.
All foundations below grade, regardless of type of structure built,
shall have a sump pump pit installed as a means to safeguard the property.
The sump pump unit may be installed at a later time if found to be
necessary to control water in the basement areas of the foundation.
Storm drain tile shall be installed before the basement floor is poured
and terminated into the sump pump pit. Sump pump discharge shall be
ducted six (6) feet out from the foundation where discharge is to
be located. Discharge should be directed to the swell between properties
or in a manner not to cause detriment to surrounding, neighboring
properties.
b.
Foundations shall be designed such that finished grading is four
(4) to six (6) inches above the level of the yard to drain water four
(4) to six (6) feet away from the foundation at a slope of four-twelfths
(4/12) or six-twelfths (6/12) pitch. The finished foundation shall
be twelve (12) inches above grade between ground and the bottom of
siding, except where step down side walls convert to a slab for the
rear of the structure.
C.
Grading And Pavement Permits. No permit for grading
or constructing any public street shall be issued until the temporary
erosion control measures set forth in the site grading and drainage
plan, or in the plot for a site exempt from land disturbance permit
requirements, have been properly installed.
D.
Temporary Erosion Control Measures. The temporary
erosion control measures described in the site grading and drainage
plan, or in the plot plan for a site exempt from the land disturbance
permit requirement, shall be properly installed prior to commencement
of any land disturbance activity and shall be properly maintained
at all times until all land surfaces on the property become stable
and non-erosive.
1.
Erosion and other pollutant control requirements recommended
for temporary best management practices to be used to control sediment
where erosion of the site, including dirt piles, during construction
will result in sediment reaching waters of the State, public sewers
or other off-site areas.
a.
Small drainage areas with overland flow [less than one (1) acre];
a filter fabric fence or equivalent best management practice placed
along the downslope areas and along the sideslope areas as required.
b.
Drainage areas of one (1) to two (2) acres with concentrated
or channelized flow; a filter fabric barrier or equivalent best management
practice placed at the downslope of the disturbed areas. The disturbed
area shall be properly mulched.
c.
Drainage areas of two (2) to five (5) acres with concentrated
or channelized flow; a sediment trap or equivalent best management
practice placed at the downslope point of the disturbed areas.
d.
Drainage areas of more than five (5) acres with concentrated
or channelized flow; a sediment basin or equivalent best management
practice placed at the downslope point of the disturbed area.
e.
Steep slopes of twelve percent (12%) or more may require use
of additional best management practices, as determined by the City
Inspector.
2.
Temporary erosion control maintenance and related responsibilities.
a.
Site stabilization. When the disturbed area
is properly stabilized by established vegetation or other permanent
means, as determined by the City Inspector, the temporary best management
practices may be removed.
b.
Tracking minimization. Each site shall have
graveled roads, access drives and parking areas of sufficient width
and length to prevent sediment from being tracked onto public or private
roadways. Sediment reaching a public or private road shall be removed
by street cleaning before the end of each day. Flushing may not be
used unless the sediment will be controlled by a filter fabric barrier,
sediment trap, sediment basin or equivalent.
c.
Drain inlet protection. Downslope storm drain
inlets shall be protected, and the protective measures shall be properly
maintained.
d.
Site dewatering. Water pumped from the site
shall be discharged to an appropriately sized filter fabric, sediment
trap or equivalent best management practice. Water may not be discharged
in a manner that causes erosion of the site, adjacent properties or
receiving channels.
e.
Sediment cleanup. All off-site sediment deposits
occurring as a result of a storm event shall be cleaned up by the
end of the next work day following the occurrence. All other off-site
sediment deposits occurring as a result of construction activities
shall be cleaned up at the end of the work day.
f.
Waste and material management and disposal. All waste and unused building materials shall be properly managed
and disposed of to prevent pollutants and debris from being carried
by runoff off the site.
g.
Wind erosion. Steps should be taken as necessary
to minimize wind erosion.
h.
Soil or dirt storage piles. Soil or dirt storage
piles shall be located twenty-five (25) feet from any downslope road,
lake, stream, wetland, ditch, channel or other watercourse and as
far away from any residential property as determined necessary by
the City Inspector and shall be protected in accordance with the provisions
of this Section. Piles located in the street or within twenty-five
(25) feet of any downslope road, lake, stream, wetland, ditch, channel,
floodplain or other watercourse shall require the use of additional
best management practices.
