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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for commercial and industrial areas do not exist. An extra chapter was

included which dealt with the state-of-the-art of estimating flood damage

in urban areas. Composite curves were presented for residential structures

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based upon SCS, U.S.A.C.E. (Omaha) and FIA data. For varying flood depths,

damages were related to a percentage of the total value (structure and

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contents) for varying building types.

The third publication (Grigg, et aI, July, 1975) was basically the

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same as the second with regard to damage analysis.

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The fourth publication (Urban Drainage and Flood Control District,

February, 1977) is currently being used by the UD&FCD's consultants doing

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major drainageway planning studies. Again, it is very similar to the second

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publication. The 1975 (the author believes they should be dated 1974) FIA

,depth-damage tables were presented. It was also mentioned again that general-

ized curves for commercial and industrial areas do not currently exist and

that these must be handled on a case-by-case basis.

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The following will describe the methodology used by various UD&FCD con-

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sultants for computing flood damage. Specific emphasis will be on the

depth-damage data being used.

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A 1973 study on Brighton Basin (NHPQ, December, 1973) used $800/acre for

flood damages in rural areas, $5,000/acre for medium density population areas,

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and $25,000/acre for urban areas. The figures covered loss, not only to

structures and their contents, but also to streets, automobiles, lawns,

shrubs, etc.

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A 1974 study in Slaughterhouse Gulch (Frasier and Gingery, May, 1974)

used U.S.A.C.E. depth-damage curves from the Lincoln, Nebraska Flood Insurance

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Study for residential and contents damage. To simplify the determination of

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