[Ord. No. 2601, 2-28-2017]
A.
Provisions of this Chapter shall apply to all residential and non-residential
site alterations. These requirements are in addition to, and do not
replace or supersede, any other applicable stormwater regulations
established under State law and approval or exemption from these requirements
does not constitute approval or exemption from stormwater management
regulations established under State law or from other applicable local,
State or Federal regulations.
1.
Grandfather Provisions. This Chapter shall not apply to the
following activities:
a.
Work consisting of the repair or maintenance of any lawful use
of land that is zoned and approved for such use on or before the effective
date of this Chapter.
b.
Existing development and ongoing land disturbance activities,
including, but not limited to, existing agriculture, silviculture,
landscaping, gardening and lawn maintenance, except that new development
or land disturbance activities on such properties will be subject
to all applicable zoning and buffer requirements.
c.
Any land development activity that is under construction, fully
approved for development, scheduled for permit approval or has been
submitted for approval as of the effective date of this Chapter.
d.
Land development activity that has not been submitted for approval,
but that is part of a larger master development plan, such as for
an office park or other phased development that has been previously
approved within two (2) years of the effective date of this Chapter.
2.
Exemptions. The following specific activities are exempt from
this Chapter. Exemption of these activities does not constitute an
exemption for any other activity proposed on a property.
a.
Activities for the purpose of building one (1) of the following:
(1)
A stream crossing by a driveway, transportation
route or utility line;
(2)
Public water supply intake or public wastewater
structures or stormwater outfalls;
(3)
Intrusions necessary to provide access to a property;
(4)
Public access facilities that must be on the water
including boat ramps, docks, foot trails leading directly to the river,
fishing platforms and overlooks;
(5)
Unpaved foot trails and paths;
(6)
Activities to restore and enhance stream bank stability,
vegetation, water quality and/or aquatic habitat, so long as native
vegetation and bioengineering techniques are used.
b.
Public Sewer Line Easements. This includes such impervious surface
cover as is necessary for the operation and maintenance of the utility,
including, but not limited to, manholes, vents and valve structures.
c.
Land development activities within a right-of-way existing at
the time this Chapter takes effect or approved under the terms of
this Chapter.
d.
Within an easement of any utility existing at the time this
Chapter takes effect or approved under the terms of this Chapter,
land disturbance activities and such impervious surface cover as is
necessary for the operation and maintenance of the utility, including,
but not limited to, manholes, vents and valve structures.
e.
Emergency work necessary to preserve life or property. However,
when emergency work is performed under this Section, the person performing
it shall report such work to the Public Services Department on the
next business day after commencement of the work. Within ten (10)
days thereafter, the person shall apply for a permit and perform such
work within such time period as may be determined by the Public Services
Department to be reasonably necessary to correct any impairment such
emergency work may have caused to the water conveyance capacity, stability
or water quality.
f.
Any activities approved under a 404 permit issued by the Corps
of Engineers and 401 water quality certification issued by the Missouri
Department of Natural Resources.
[Ord. No. 2601, 2-28-2017]
A.
Purpose And Objective. The City of Olivette recognizes that redevelopment
of property, either in the form of expansion or new construction,
in a developed community is unique and challenging as it relates to
managing stormwater. Given that redevelopment in Olivette, whether
residential or non-residential, occurs on a lot by lot basis, addressing
stormwater issues that go beyond the scope of the property being developed
is limited.
In an effort to adequately plan for and resolve stormwater issues
on a City-wide basis as individual lots redevelop, the adoption of
the following underlying principles are intended to provide the City
guidance during the review of site alterations. These principles will
be applied so as to manage stormwater on two (2) levels:
|
a.
|
The stormwater impacting the property under review from adjacent
and surrounding properties, and
|
|
b.
|
The impacts of the stormwater generated by the existing and
proposed improvements on the property grounds under review onto adjacent
and surrounding properties.
|
|
These principles and acceptable practices will be utilized by
the City to manage stormwater generated on a site due to new construction
or reconstruction and to minimize the adverse impact of any increase
of stormwater onto adjacent and surrounding properties. These principles
and acceptable practices are to manage stormwater and should not be
construed as a means for reducing or eliminating stormwater that is
already generated on or surrounding the site.
| |
B.
Principles.
1.
Applications for site alterations approvals shall be designed
and reviewed in accordance to the following acceptable principles:
a.
Encourage the reduction of:
(1)
Disturbance to preserved greenspace, buffers, zoning
setbacks, and sensitive areas such as flood plains and stream buffers;
(2)
Impervious surface areas such as rooftops, parking
lots, sidewalks, roads, etc.;
(3)
Stormwater generation and the amount of stormwater
leaving the site;
(4)
The impact to environmentally sensitive areas;
and
c.
Promote the use of pervious surface materials, such as permeable
paver blocks, porous asphalt, porous concrete and green roofs.
d.
Encourage the stormwater generated on the site grounds to filter,
disperse and permeate on the site grounds through the use of overland
flow to vegetated buffers and other "green" infrastructure techniques
that promote infiltration.
e.
Avoid the direct flow of stormwater generated from impervious
surface areas to the storm sewer system.
f.
Encourage the installation of engineered systems that treat
stormwater runoff and/or reduce peak stormwater runoff rates using
techniques that employ vegetation and infiltration.
g.
Adequately treat stormwater before discharge.
h.
Stormwater controls shall be maintainable and enforceable.
2.
Acceptable Practices. To promote the adopted principles, the
City of Olivette has adopted the following two (2) documents developed
by the MSD as reference resources for acceptable practices and tools
to manage stormwater, as may be revised from time to time:
a.
Site Guidance Design. Tools for incorporating post-construction
stormwater quality protection into concept plans and land disturbance
permitting. Revision 1, April 17, 2009.
b.
Landscape Guide For Stormwater BMPs Design.
|
Copies of the adopted documents are on file in the office of the Director of Public Services. In addition to the adopted documents, the Commission may accept the utilization of other BMPs if the applicant can satisfactorily show the Commission, and that the Commission determines, that said practice will equally facilitate the principles and practices outlined in Section 422.060.
|
