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FLOOD06965
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Last modified
1/25/2010 7:10:28 PM
Creation date
10/5/2006 2:39:59 AM
Metadata
Fields
Template:
Floodplain Documents
County
Adams
Community
Northglenn, Thornton
Stream Name
Grange Hall Creek
Basin
South Platte
Title
Major Drainageway Planning
Date
12/1/1977
Prepared For
Adams County
Prepared By
UDFCD
Contract/PO #
&&
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />HYDRO-TRIAD. LTD. <br /> <br />TABLE TIz:-1 <br /> <br /> CARPENTER DAM COST COMPARISONS <br /> (In Thousands of Dollars) <br /> (Based on 2,100 Acre-Feet of Storage Available - One Turnover in Use Per Year) <br /> WATER SUPPLY RELATED COSTS FLOOD RELATED COSTS <br /> TOTAL <br /> ANNUAL ANNUAL ANNUAL IMPROVEMENTS COSTS5 TOTAL TOTAL ANNUAL WATER SUPPLY <br /> TOTAL COSTS WATER FLOOD ANNUAL ANNUAL AND FLOOD COSTS <br /> COST OF LAND 'STRUC. 50-YR1 SUPPLY DAMAGES 4 PRESENT 50-YEAR FLOOD COSTS Columns 4 & 10 <br />AL TERNATIVES CONSTR. COSTS COSTS LIFE BENEFIT WIO IMP WORTH ANNUAL. BENEFIT WI IMP. With Improv. Hithout Impro\L <br />A-Existing Condition 3,3602 210.03 <br />~Possibly Buy Into 0 3,360 216.7 43,6 651 42 24.7 60.9 277 .6 260.3 <br />Blunn Reservoir) <br />B-Existing Condition 210.03 210.03 <br />(Rent Water on Ann. 43.6 651 42 24.7 60.9 270.9 253.6 <br />Extended Bas i s <br />C-Hith Carpenter Dam <br />Constructed as per 2,460 272 2,732 176.2 210.03 6.8 183 11.8 4.4 14.2 190.4 183.0 <br />Original Con. Doc. <br /> <br />1 The annual O&M is assumed to be equal for all alternatives, therefore, it is not included (interest rate used is 6 1/8%). <br />2 Cost of construction is based on a cost of $1,600 acre-feet for 2,100 acre-feet of raw water. <br />3 The cost is based on a rental or acquisition direct cost of $100 per acre-foot per year. <br />4 The private farm areas below Riverdale Road are excluded in the annual flood damages. Also, the improvement costs do not include any costs <br />attributed to the farm areas. <br /> <br />5 Reference Phase A Report on Grange Hall Creek, includes improvement, contingency, operation and maintenance, and fiscal and administrative <br />costs. <br /> <br />8/77 <br />
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