HomeMy WebLinkAboutFile Documents.309 Oak Ln.0021-2022-BRES (26) JVA,Incorporated
111��1 817 Colorado Avenue
"„"„""' Suite 301
Glenwood Springs,
CONSULTING ENGINEERS
CO 81601
February 5, 2024 970.404.3100
info@jvajva.com
Wyatt Young
Project Manager
www.jvajva.com
City of Aspen Engineering Department
427 Rio Grande Place
Aspen, CO 81611
RE: 309 Oak Lane
JVA Job No. 3529c
Dear Wyatt,
This letter is intended to show general conformance to the approved construction drawings dated
January 5, 2022. We have also included an annotated version of our Grading and Drainage Plan
which shows the as-built conditions in RED. There are some slight differences in invert
elevations for some storm drains, but those differences will not affect the capacity or
performance of the storm drain system.
Please let us know if there are any questions or concerns.
Sincerely,
NA, INCORPORATED
By:
James L. Spung, P.E.
Senior Project Manager
Enclosures:
Annotated Grading and Drainage Plan
Maintenance Plan
Stormwater Best Management Practices—Operations and Maintenance Agreement
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2 of 2
CONSULTING ENGINEERS
MAINTENANCE
The homeowner will maintain the dry well per the following requirements:
Required Maintenance Objective Frequency of Action
Action
Monitor water level and accumulation of Annually and following all rainfall events
Inspection sediments in wells. >0.25 inches.
Dispose of sediment, debris/trash, and
Sediment/ any other waste material removed from a Once per year or when needed to
debris dry well at suitable disposal sites and in
removal compliance with local, state, and federal promote drainage.
waste regulations.
Routinely evaluate the drain-down time
of the dry well to ensure the maximum
time of 24 hours is not being exceeded. If
drain-down times are exceeding the
maximum, drain the dry well via pumping
Evaluation and clean out the percolation area (the Routinely following rain events.
percolation barrel may be
jetted to remove sediment accumulated
in perforations). Consider drilling
additional perforations in the barrel. If
slow drainage persists,the system may
need to be replaced.
The homeowner will keep records of all maintenance performed including action(s)taken and dates.