HomeMy WebLinkAboutFile Documents.36 Ute Pl.0019.2017 (8).ARBU poss ARGI_1FFE . E.+ PLANNING
605 EAST MAIN STREET ASPEN, COLORADO 81611
It)970/925-4755 (f) 970/920-2950 MEMORANDUM
TO: City of Aspe Engineering Dept,
CC: File
FROM: Keith Howie
Bill Poss and Associates Architecture and Planning,P.C.
DATE: February 20, 2017
RE: 36 Ute Place-Drainage Narrative ® ENCLOSURE !.
Dear COA Engineering Department,
Please find below the required narrative for drainage requirements for MINOR design.
Classification
This project is considered minor design per the City of Aspen as it will disturb between 200-1000 sq. ft.of
soil or impervious area.The site disturbance has been calculated using the existing and proposed site plans.
The total disturbance will be 333 sq. ft.
Existing Site
• Location
The project location is Located at Lot 4,Ute Place subdivision in the east end of Aspen.The address is 36
Ute Place.
• Topography
The topography is sloping from the east to west side of the property.The amount of slope is approximately (:
ten to eleven feet across the property.The existing residence is a two story house above grade with a walk-out
basement on the west side.
• Land Use
The land use is single family residential.
• Ground Cover
The ground cover consists of sod in the open areas, and mulch under the pines trees. The site is heavily treed
with mature Spruce and Aspen trees over the majority of the property.
• Soil type 1
The underlying soil type is silty gravel,cobbles,and boulders per the soils report.The entire site has been
landscaped and has a layer of topsoil on it.
• Drainage Pattern
The drainage pattern flows with the slope of the site, from east to west,around the current residence.
The original house was built around 1983.There are area drains at the lower terrace and internal drains in
the house.At the current time,with the drains as evidence,we know that there is an underground drainage
system but we do not know the extent of the system.
Received
2/27/17
pass 1 ,,;`l€f •f:::C;••l.11:.? ,.Pf.ANN I NG
Proposed Project
The proposed project is a relocation and replacement of the existing hot tub, a new hot tub area, and a stair
to connect the main level deck with the new hot tub area.There are no changes to the land use,topography,
ground cover,soil type, drainage pattern,and receiving system.
Drainage Issues
There are currently no drainage issues on the property.The new impervious area will drain to the adjacent
pervious landscape and planting areas on either side of the new hot tub area.
Drainage Alterations
There are no changes to the current drainage pattern.There is sufficient pervious area on either side of the
new area to handle the small increase in flow from the area.
Downwater Stormwater Conveyance System
Due to the small footprint.(333 sf) of the new area of the project,the downwater stormwater conveyance
should be minimal if at all. The water that accumulates on the new area will percolate into the sod and
planting s areas on either side of the new area.This follows the recommendations of the urban runoff
management plan to"Place stormwater in contact with the landscape and soil."We will have a planting area
between the new area and the house that can help filter the runoff.
In conclusion,due to the small footprint of the new area and availability to drain the new area to adjacent
landscaped areas that this project will have minimal impact on the existing lot.
If there is additional information required,please call @ 925.4755 x 284 or email at khowie@billposs.com
Respectfully submitted,
r
1
Keith Howie
Principal,Poss Architecture lj
it
Received
2/27/17
.