HomeMy WebLinkAboutGrading Plans - 06/14/2016PROGRESSIVE
ENGINEERING & CONSULTING, LLC
404 IMMIGRANT TRAIL WINDSOR, CO 80550 (970) 590-6059
June 13, 2016 ILOT 3 LESS N 54 FT OF E 25 FT AND S 126 FT OF W 10 FT LOT2, BLK 1 FR
B1601561 & B1602101
Rucket� Design Build
2600 W. Prospect Road
Fort Collings CO 80526
RE: Drainage Memo
1804 W Mountain Avenue
Fort Collins, Colorado
Gentlemen:
This letter describes the drainage impacts of the proposed new single family residence at 1804 W Mountain
Avenue in Fort Collins Co.
This project consists of the removal of an existing single story residence and replacement with a new single
family residence and detached garage. The existing site drainage can be generally described as a type B lot with
drainage flow partially toward the fi•ont and back of the existing lot. The existing lot size is 8,910 squar•e feet.
Historically drainage has flowed toward the adjoining lot, east of this site. Existing grades are generally
between 1.5 and 2% toward the north east. The existing site had approYimately 1,216 square feet of impervious
area.
Proposed impeivious area is approYimately 3,820 square feet with the majority of the drainage directed toward
the north Alley ROW. Drainage to�vard the existing property, to the east, has been minimized and site grading
accommodates firttu•e improvements of the east property to allow redirection of drainage toward the north and
south ROW. Site drainage toward the north will cross pervious areas to minimize storm flows to the Alley.
The proposed improvements result in a net increase of approximately 2,400 square feet of impervious area. The
proposed imper•vious area is approximately 43% of the lot area. Impervious lot coverage is consistent with
nearby properties. With the redirection of most of the drainage toward the ROW's north and south of drainage
impacts to the adjacent property are reduced. No adverse impacts to adjacent properties are anticipated.
Please give me a call if you have any questions or if I may be of fiirther assistance.
Sincerely� ,., . , , .
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LEGEND
PROPERTY LINE
- - - - EASEMENT
- SETBACK
�- DRAINAGE DIRECTION
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O1 15' SETBACK O 5' SETBACK
NOTES:
1. GRADING AND TOF ELEVAT10N5 NOiED ON hil5 PLOT ARE SUBJECT TO FlELD
VERIFlCA710N AND MAY RE�UIRE ADJUSTMENT.
2. EASEMENTS DISPLAYED ON THIS PLOT ARE FROM THE ASBUILT SURVEY AND MAY NOT
INCLUDE ALL EASEMENTS OF RECORD.
3. DIMENSIONS SHOWN AROUND THE PERIMEiER OF THE SiRUCTURE ARE TO THE EXTERIOR
FOUNDAl10N CORNERS.
4. PROVIDE AND MAINTAIN POSIIiVE DRAINAGE AWAY FROM ALL FOUNDATION WALLS PER
WARRANTY REQUIREMEN'fS. (0.5� MIN. SLOPE FOR CONCRETE PANS.)
5. hi15 PIAN SHOWS PROPOSED IMPROVEMENTS ONLY. FlNAL CONSTRUCTION MAY VARY.
53.4 E.G.
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SCALE: 1" = 20'