HomeMy WebLinkAboutGrading Plans - 01/26/2022�CTL I THOMPSON
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January 17, 2022
Old Town Designs, Inc.
210 E. Oak Street
Suite C
Fort Collins, Colorado 80524
Grading/Stormwater Plan Accepted
(Building Permit Released)
Accepted by: Dan Mogen
Date: 01/26/2022
Attn: Ms. Keira Harkin
Subject: Drainage Memo
516 Sheldon Drive Lakeside Terrace Lot 18
Fort Collins, Colorado
Project No. WY01957.000-500
Dear Ms. Harkin,
The above referenced lot has historically drained from the northwest to the southeast. The drainage
flows from the high side near the corner of West Mulberry Street and Sheldon Drive to the
southeast property corner. This lot has slopes that ranged from 0.2% to 3.0%.
The current impervious area consists of the house/garage with an approximate square footage of
2,004 sf and 647 square feet of sidewalk and driveway for a total existing area of approximately
2,651 sf. The total lot area is approximately 9,995 square feet. The proposed impervious area will
include the house at 1,805 square feet plus the porposed 565 square foot addition and 1,272
square feet of new driveway layout for a total of 3,642 square feet. This increases the impervious
surface area by 991 sf or 37%.
Attached is a drainage plan that includes drainage around the existing and proposed new structure.
This drainage plan will conduct water away from the proposed and existing structures and direct the
drainage water around the existing house in the same direction as it has historically flowed. A swale
will be cut in between the addition and the property line on the south side of the addition to direct
the drainage to the west to Sheldon Drive. This drainage will drain across the turf and landscaping
towards the southwest property corner and then to Sheldon Drive. We recommend that the new
downspouts on the addition be installed to discharge drainage water to the south or west so as to
not direct roof drainage water at the adjacent properties. The drainage recommendation for this lot
will not have any adverse impacts on the adjacent lots.
Thank you for selecting CTL�THOMPSON for your engineering needs. When we can be of
additional service, please contact the undersigned.
Very truly yours, ;;�=;�p �t"';�-s�:.`
CTL�THOMPSON, IN.CJ3�? i' -,,����.��:',�, }.
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Vice President � Reg�on_al M;anagerr-��;�
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Attachment: Drainage Plan, �Fort Collins Local Topo
1103 Old Town Lane � Suite 201 B � Cheyenne. Wyoming 82009 � Telephone: 970-206-9455 � www.ctlt.com
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Topo Map Near Sheldon Drive
• 516 Sheldon Dr
Contours lft NoCO 2014
- Index (5 ft)
- Index (5 ft)
Intermediate (1 ft)
Intermediate (1 ft)
City of
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