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FORT COLLINS | GREELEY
FINAL DRAINAGE REPORT: IMPALA REDEVELOPMENT
APPENDIX
APPENDIX B
HYDRAULIC COMPUTATIONS
NORTHERNENGINEERING.COM | 970.221.4158
FORT COLLINS | GREELEY
FINAL DRAINAGE REPORT: IMPALA REDEVELOPMENT
APPENDIX
APPENDIX C
LID & WATER QUALITY EXHIBITS
Project Number:Project:
Project Location:
Calculations By:Date:
Sq. Ft. Acres
100 111,708 2.56 72%Rain Garden 1 Rain Garden 2,158 80,430
101 36,520 0.84 9%n/a n/a 0 3,287
200 (NEW or
Modified)11,638 0.27
100%n/a n/a 877 11,638
OS1 10,135 0.20 72% n/a n/a 0 7,297
OS5 590 0.01 100% n/a n/a 0 590
Total 170,591 1.31 103,242
LID Summary
Project Number:Project:
Project Location:
Calculations By:Date:
LID Summary
per LID
Structure
Sq. Ft. Acres
Rain Garden 1 111,708 2.56 72%101 Rain Garden 1,798 2,158 80,430
Total 111,708 2.56 2,158 80,430
170,591 ft2
103,242 ft2
10,584 ft2
77,431 ft2
80,430 ft2
77.90%
LID Summary
AreaBasin ID Treatment TypePercent
Impervious LID ID
Impala Redevelopment
1/11/2023
1914-001
Fort Collins, Colorado
S. Ritchie
Total
Impervious
Area (ft2)
Required
Volume (ft3)
LID Summary per Basin
Area Weighted
%
Impervious
1914-001
Fort Collins, Colorado
S. Ritchie
Impervious
Area (ft2)
Vol. w/20%
Increase per
Fort Collins
Manual (ft3)
Impala Redevelopment
1/11/2023
Subbasin ID Treatment TypeLID ID Volume per
UD-BMP (ft3)
Total Treated Area
Percent Impervious Treated by LID
O1-O7
75% Requried Minimum Area to be Treated
LID Site Summary - New Impervious Area
Total Area of Current Development
Total Impervious Area
Total Impervious Area without LID Treatment