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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Studies", held in Sacramento, California on October 2 and 3, 1969. The

relationships are presented on page 35.

~e Galveston District has developed the most comprehensive curves

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of all the Corps Districts contacted. Depth-damage data was developed

for residential structures and residential contents for seven different

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categories of residential construction all without basements. Whole property

values and incremental property damage values are based on current market

values and not replacement costs. Salvage values of property damaged

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was incorporated in the depth-damage relationships. The market values are

determined from reconnaissance type appraisals in the field. Realtors and

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tax offices are checked for recent sales of housing in the study areas.

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Land values are not included in the damage analysis. The relationships are

shown on pages 36 & 37. Their data, from about 1,000 field samples indicateci

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that the differences in depth-damage relationships for wood frame structures

on piers and brick veneer structures on slabs were not significant.

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The Galveston District uses 50% of the structure value as the average

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value of contents for residential structures. This assumption was based

upon their 1,000 field samples.

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The Galveston District has also developed depth-damage relationships for

146 different commercial property types. Separate relationships were developed

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for structure, equipment, and inventory. The relationships were developed

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from surveys taken in 1964 and 1965. Since that time, spot samples have been

taken to update and verify the relationships. The market value for the struc-

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tures is assumed to be equivalent to the value of a similar property recently

sold, The market value of equipment is assumed to be 65% of the original

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cost or the average value for the life of the equipment. The wholesale value

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34