FLOOD02918

• County: Denver
• Community: Denver
• Stream Name: South Platte River
• Basin: South Platte
• Title: Estimation of Flood Depth-Damage Curves for Residential, Commercial and Industrial Properties in the Denver Region
• Date: 10/1/1977
• Prepared For: CWCB
• Prepared By: Wayne J. Grahm ‎(Master of Science Candidate at CSU)‎
• Floodplain - Doc Type: Educational/Technical/Reference Information

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were used for determining structure and content damage to residential and

commercial properties.

In a 1976 study, on Ralston Creek (Wright-McLaughlin Engineers, May,

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1976) the 1970 FIA curves were again used to calculate dollar damage values

for structures and furnishings for the various levels of flooding. All

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residences were assumed to be one-story ranch style with basements with the

contents being located on the first floor and in the basement. The resi-

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dential contents damage curve used was altered for depths of 5 feet and

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above. The contractor raised the damage percent from 82% to 95% "to more

closely represent damages which would result from over 5 feet of water

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inside a residential structure".

Later in 1976, a study on Grangehall Creek (Hydro Triad, September, 1976)

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again used the 1970 FIA curves that were contained in the "Interim Methodology,

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Benefit Cost Analysis for Urban Drainage Planning" (Rice, March, 1974).

Early in 1977, a study on Sloans Lake Basin (URS, March, 1977) followed

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the methodology contained within "Urban Drainage and Flood Control Projects

Economic, Legal, and Financial Aspects" (Grigg, et aI, July, 1975). In the

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study, residential damages were agin computed using FIA's 1970 curves. Con-

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tents were assumed to be equal to 50% of the structure value. For commercial

and industrial property damages were obtained from the depth-damage relation-

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ships contained in the SCS reference "Basic Data for Evaluating Floodwater

Damages to Urban Properties", October 9, 1967. This document presented struc-

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ture and content damages based on depths of inundation for 67 different types

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of businesses of varying floor space,size, and building types.

Another 1977 study, this one on Van Bibber Creek (Gingery, March, 1977)

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used FIA depth-damage curves. It is not certain, but believed that they were

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