HomeMy WebLinkAboutFile Documents.209 E Bleeker St.0320.2017 (3).ARBK P.O. Box 3901 YARNELL CONSULTING & 229 Midland Ave.
Eagle, Colorado 81631 Basalt, Colorado 81621
CIVIL DESIGN, LLC
(970) 323-7008 • 12/12/2023
Subject: 209 East Bleeker Street
Stormwater Best Management Practices Maintenance Plan
In general,the drainage design for this property employs vegetated swales,inlets,and below-grade
piping to convey runoff generated on the site to one of two locations on the site. First,the hardscape
along the rear of the home is tributary to a gutter that conveys drainage west to an area of cobble
riprap near the west property corner. In this location,water is infiltrated through the cobble into
the on-site soils.The remainder of the site is tributary to a gravel bed within the recessed area in
the northeast quadrant of the site.Again,water is infiltrated through the gravel and into the soils
beneath.
Maintenance associated with the storm water infrastructure of the project generally requires that
built-up sediment be removed from the vegetated swales,inlets,and piping to ensure they maintain
capacity and conveyance capability. If any portion of the swales remain wet and squishy,it may
indicate the need to re-grade the Swale.
The two (2) areas of rock slated to receive and infiltrate drainage shall be inspected to ensure water
continues to flow freely into them. Periodic removal of sediments and pollutants may be necessary
when clogging reduces infiltration capacity to a point where the area does not completely dry out
after 72 hours without precipitation.
All maintenance shall be done by the owner or his property manager.The city's engineering
department will also inspect the stormwater infrastructure on a regular basis to ensure it is being
maintained.
For more information,refer to Table 2 below which is Table 8.12 within the city of Aspen's Urban
Runoff Management Plan. Provide a little more detail on to how to
access the cleanouts/outflows or provide a
map showing the locations that need to be
checked for build up and how often
regardless of dry out time. Every 3
months, every 6 months?
209 East Bleeker Street Page 1 of 2
P.O. Box 3901 YARNELL CONSULTING & 229 Midland Ave.
Eagle, Colorado 81631 Basalt, Colorado 81621
CIVIL DESIGN, LLC
(970) 323-7008 • 12/12/2023
Table 1:Maintenance Recommendations for Gravel Beds
Required Action Maintenance Objectives Frequency
Inspections Inspect gravel bed areas to Routine-Annual inspection of
determine if voids are hydraulic performance.
allowing acceptable
infiltration.
Vegetative care Occasional weed removal to Routine-Depending on
limit vegetation. Maintain aesthetic requirements.
surfaces of rock that are free
of any vegetation or soil that
would inhibit water
movement down into the rock.
Debris and litter removal Remove debris and litter from Routine-Depending on
detention area to minimize aesthetic requirements.
clogging of the sand media.
Rock removal and The voids in the rock will Every 5 to 15 years,depending
replacement begin to clog with time as on the infiltration rates
sediment and other materials needed to drain the WQCV in
accumulate in them.This layer 12 hours or less. May need to
will need to be removed and do it more frequently if
replaced to rehabilitate exfiltration rates are too low
infiltration rates. to achieve this goal.
please provide a basic site plan showing
all the infrastructure that needs to be
maintained so it is easy for the
homeowner or property manager to
perform maintenance.
209 East Bleeker Street Page 2 of 2