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February 20, 2020
Rogers Construction LLC
531 East Skyway Drive
Fort Collins, Colorado 80525
Drainage memo and grading plan
accepted, permit released
2/21/2020 DJM
Attention: Mr. Bill Rogers
Subject: Drainage Memo
797 East Laurel Street
Fort Collins, Colorado
Project No. WY01772.000-500
Dear Mr. Rogers,
The above referenced lot has historically drained from south to north with a cross slope towards the
east alley. This lot has slopes ranging from 1.0% to 2.0% for a majority of the lot. The east side of
the lot, adjacent to the alley, does drain towards Laurel Street.
The lot area is approximately 5965 square feet. The proposed impervious area will include 1290
square feet of house and 60 square feet of sidewalk for a total of 1350 square feet. There is a
pervious gravel parking area off of the alley but was not considered in the impervious area.
Attached is a drainage plan that includes drainage around the proposed new structure. This
drainage plan will conduct water away from the existing and proposed structures and directs the
drainage water in the same direction as it has historically flowed. Drainage from between the new
house and the existing structures will be swaled down the west side of the house and directed to
the north and out to Laurel Street. Swales will be cut in between the house and the property lines on
the west and south sides to direct a majority of the drainage to the north and east sides. The west
side swale will drain across the turf and landscaping towards the north to Laurel Street. The south
side swale will drain across the turf and landscaping towards the east to the alley. We recommend
that the new downspouts on the residence be installed to discharge drainage water to the north or
south 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, ;"
CTL�THOMPSON, INC � 4 �° �t�G�!�t�`�,
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yatt M. nutson p E� ����i� �Y
Vice President � Regioh�l I�/I���`r1a��„�
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Attachment: Drainage Plan
1103 Old Town Lane � Suite 201 B � Cheyenne, Wyoming 82009 � Telephone: 970-206-9455 � www.ctlt.com