[Ord. No. 5965 §1(15-100), 3-13-2007]
A. Land
development projects and associated increases in impervious cover
alter the hydrologics of local watersheds and increase storm water
runoff rates and volumes, flooding, stream channel erosion, and sediment
transport and deposition. This storm water runoff contributes to increased
quantities of water-borne pollutants, and storm water runoff, soil
erosion and non-point source pollution can be controlled and minimized
through the regulation of storm water runoff from development sites.
B. The Metropolitan
St. Louis Sewer District (MSD) has established a set of water quality
and quantity policies applicable to all development in the MSD service
area, including the City of Clayton, to provide reasonable guidance
for the regulation of storm water runoff for the purpose of protecting
local water resources from degradation. It has been determined that
the regulation of storm water runoff discharges from land development
projects and other construction activities in order to control and
minimize increases in storm water runoff rates and volumes, soil erosion,
stream channel erosion and non-point source pollution associated with
storm water runoff is in the public interest and will prevent threats
to public health and safety.
[Ord. No. 5965 §1(15-101), 3-13-2007]
A. The purpose
of this Article is to protect and safeguard the general health, safety
and welfare of the public residing in watersheds within the City of
Clayton which is included in the MSD service area. In general, the
City of Clayton seeks to meet that purpose through the following objectives:
1. Minimize
increases in storm water runoff from any development in order to reduce
flooding, siltation and erosion;
2. Minimize
increases in non-point source pollution caused by storm water runoff
from development which would otherwise degrade local water quality;
and
3. Reduce
storm water runoff rates and volumes, soil erosion and non-point source
pollution, wherever possible, through storm water management controls
and to ensure that these management controls are properly maintained
and pose no threat to public safety or adjacent properties.
[Ord. No. 5965 §1(15-102), 3-13-2007]
This Article shall be applicable to all site plan applications
where a MSD permit is required and a City permit is needed for the
construction.
[Ord. No. 5965 §1(15-103), 3-13-2007]
A. The City
of Clayton specifies the MSD Rules and Regulations and Engineering
Design Requirements for Sanitary and Storm Water Drainage Facilities
as originally adopted February 2006, or latest version, as the applicable
document for the proper implementation of the requirements of this
Article. In addition, the City of Clayton's City-Wide Storm Water
Study, dated August 2006, includes details of several BMPs for addressing
specific needs in the City of Clayton such as rain gardens, bioswales,
pervious concrete, pervious paver systems and storm water planters.
B. The MSD
regulations include a list of acceptable storm water treatment practices,
including the specific design criteria for each storm water practice.
The manual may be updated and expanded from time to time, at the discretion
of MSD, based on improvements in engineering, science, monitoring
and local maintenance experience. Storm water treatment practices
that are designed and constructed in accordance with these design
and sizing criteria will be presumed to meet the minimum water quality
performance standards.
C. Developers
shall include storm water control measures on the site plan submitted
for the Department of Planning and Development review of proposed
construction in addition to submittal to MSD for appropriate permits.