HomeMy WebLinkAbout015 - Stormwater Maintenance PlanSTORMWATER MAINTENANCE PLAN FOR COMPASS APARTMENT COMPLEX
The following areas, facilities will be inspected and the identified deficiencies shall be corrected.
Clean-out must include the removal and legal disposal of any accumulated sediments and debris
from the entire stormwater management system.
Storm Water Facilities:
1. Retention Ponds/Detention Ponds:
Inspect ponds annually and after major storms (following three days of dry weather after
a storm event exceeding ¼ inch of precipitation.) and correct any identified deficiencies
to ensure that it is working in its intended fashion and that it is free of trash and debris.
Failure for water to percolate or pass through outlet structure within this time period
indicates clogging or poor-draining soils. Replace/repair as necessary. Remove and
properly dispose of any accumulated sediment or debris as needed. Inspect the
embankments and drainage structures for settlement, slope erosion, and downstream
swamping.
Mow the embankment to control woody vegetation. Remove woody debris from the
bottom of the pond. Inspect for channelization at bottom of pond and remove any
channels observed. Regrade as required if any channels are found that are not an element
of the original design. Remove grass clippings, litter, and debris from ponds.
2. Vegetated Areas:
Inspect slopes and embankments early in the growing season to identify active or
potential erosion problems. Replant bare areas or areas with sparse growth. Where rill
erosion is evident, armor the area with an appropriate lining or divert the erosive flows to
on-site areas able to withstand the concentrated flows. The facilities will be inspected
after major storms and any identified deficiencies will be corrected.
3. Ditches, Swales, Stormwater Chases and other Open Stormwater Channels:
Inspect 2 times per year (preferably in Spring and Fall) to ensure they are working in
their intended fashion and that they are free of sediment and debris. Remove any
obstructions to flow, including accumulated sediments and debris and vegetated growth.
Repair any erosion of the ditch lining. Vegetated ditches will be mowed at least annually
or otherwise maintained to control the growth of woody vegetation and maintain flow
capacity. Any woody vegetation growing through riprap linings must also be removed.
Repair any slumping side slopes as soon as practicable. If the ditch has a riprap lining,
replace riprap on areas where any underlying filter fabric or underdrain gravel is showing
through the stone or where stones have dislodged. Correct any erosion of the channel's
bottom or side slopes. The facilities will be inspected after major storms and any
identified deficiencies will be corrected. For concrete stormwater chase structures with
metal “no slip” cover. Inspect covers to ensure metal edges aren’t protruding above the
concrete surface. Correct deficiencies if found. Repair damaged or badly cracked
stormwater chases if observed.
Standard Maintenance Summary:
1. Remove sediment and oil/grease from retention ponds.
2. Inspect and remove debris from drainage swales, catch basins, and detention ponds.
3. Monitor health of vegetation and revegetate as necessary to maintain full vegetative
cover.
4. Inspect for the following issues: differential accumulation of sediment, drain time, signs
of petroleum hydrocarbon contamination (odors, oil sheen in pond water), standing water,
trash and debris blockages.
Note on sediment disposal:
In most cases, sediment from a detention pond does not contain toxins at levels posing a
hazardous concern. However, sediments should be tested for toxicants in compliance with
current disposal requirements and if land uses in the drainage area include commercial or
industrial zones, or if visual or olfactory indications of pollution are noticed. Sediments
containing high levels of pollutants should be disposed of in accordance with applicable
regulations and the potential sources of contamination should be investigated and contamination
practices terminated.
Maintenance Responsibility of Common Open Space A Pond:
It is anticipated by the parties that Bozeman Apartment Holdings, LLC, a Montana limited
liability company, will oversee maintenance of the existing pond located within Common Open
Space A.
ACCEPTED BY BOZEMAN APARTMENT HOLDINGS LLC, BY
Signature: ________________________________________________ Date: _______________
Printed Name: _______________________ ________________________________________