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ADVANCED
ENGINEERING, LLC
STRUCTURAL DRAINAGE DRAFTING
May 15, 2017
Mr. Scott Fetters
HighCraft Builders
429 S. Howes Street
Ft. Collins, CO 80521
RE: Site Drainage at 621 W. Magnolia Street, Ft. Collins, Colorado
Advanced Engineering, LLC Project Number 1011-230-01 B
Dear Mr. Fetters:
We have consulted with you regarding an addition project that is proposed at the above referenced
site. The home is to have a one story addition at the west side over a crawl space, with an attached
garage. Our office has reviewed the existing and proposed drainage conditions at the sit�. This
review included visual observations, a limited elevation survey, and area calculations. The purpose
for this review was to evaluate the impact of the proposed project on existing drainage conditions.
Existing drainage conditions are poor, similar to many homes in this area of town. The lot is
generally very near flat and will experience ponding in most locations during precipitation events.
Drainage at the front yard and existing parking pad �enerally flow north to Magnolia Street. At the
side and back yard areas drainage generally flows to the southeast corner of the lot, passing through
the adjacent lot to the east, to the alley beyond. The addition is located in the side and back yards.
Based on our review, the impervious azea at the site will be increased by approximately 14% above
existing conditions. However, approximately 90% of the new impervious area will drain to
Magnolia Street via roof gutters and downspouts. Therefore, the newly developed drainage to the
southeast corner of the lot will actually be reduced from the existing conditions in the yard. Given
this, it is our opinion the existing drainage will not be negatively impacted and will continue to
function as it has historically.
The recommendations and conclusions presented in this letter are based on a visual review of
portions of the described site/structures, your plans and your directions. Our review was limited to
the items described in this letter, and is not intended to cover structural, mechanical, electrical,
environmental, mold, or azchitectural features of the site/buildings. Discrepancies or deficiencies
revealed during construction should be brought to the attention of the engineer. Thank you for the
opportunity to serve you. If you have any questions, please feel free to call.
.���`��,i���tt�t��1�1l�/�����
Sincerely, '� F�Vv REG/S�'''''•
.
Advanced Engineering, LL `,`�w:; JN �� a,f,��.�`,pm,;
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Jason E. Baker, P.E. ' �� � � %`' �
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President � {-f!
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229 12'" Street SW, Lo��H���Colorado 80537 Telephone 970-278-1909
Project No. `O�1 r l/ �lJ r �L �
AD VA N C E D Calculated by �� date ��
ENGINEERING� LLC Reviewedby date
STRUCTURAL DRAINAGE ORAFTING
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