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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to $44,000. It is thus important to arrive at the actual cash value of

the structure, excluding any lot value, and structure depreciation, before

using the curves, If this is not done, the damage figures would be exaggerated.

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Reducing the selling price of combination structure-lot by approximately 18-20%

is a good national norm to arrive at ACV of the structure but with the rapid

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housing inflation in Denver of the past 12 months, the percentage should prob-

ably be greater. Something in the order of 20-25% would be more appropriate

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in Denver. Eight to ten percent for depreciation and 12-15% for lot value.

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Replacement Cost and Actual Cash Value of structures can be obtained by using

the Marshall and Swift appraisal guide as another method. The costs should be

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adjusted by using Engineering News Record Indices or building and labor factors

for the Denver area.

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Another set of depth-damage curves is available from the Stanford Research

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Institute (Homan, et al., 1960). As was stated earlier in the paper, residen-

tial structure and content damage curves were developed using SRI 1958

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residential schedules and another set was developed using Corps of Engineers

1955 and 1958 residential schedules. The SRI curves related damages to market

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value of structure or contents whereas, the Corps curves related damages to

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structure plus lot value. Because of the age of the material, it will not be

presented.

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For commercial and industrial establishments, the SRI reported contents

value at 128% of structure value. The low as 45% for restaurants and the high,

165%, for manufacturing establishments. An interesting conclusion of the study

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was that there were distinct differences in the average observed damage per

$1,000 of market value of structure and contents among the different business

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groups, but the range of differences in damage ratios within a single group

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