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"""'''' I I , I I I , , , -,'" Land Treatment Measures All project costs aTe allocated to flood prevention, The installation cost of the structural measures amortized at 5-1/8 percent over 100 years is $1181960, including annual operation and maintenance costs estimated at ~3,860. The ratio of benefits, $252,330, to costs, $118,960, is 2.1 to 1.0. Land treatment measures will be established by the land owners and oper- ators of private and State land in cooperation with Soil Conservation Districts. Measures to be applied include practices for watershed pro- tection, land and vegetative ilnprovement. irrigation water JI\81l3gement and wildlife enhancement. These measures will be applied during the five~year project installation period. Costs for land treatment measures are estimated to be $1,408,730. Of this <lJIW;)Ultt, $1,325,230 will be provided by other than Public Law 566 funds. P\bUc Law 566 funds estimated to be $80,000 will be used for technical assistance to accelerate the planning and application of land treatlllent measures on private and State land. About $3,500 will be pro- vided to the U. S. Forest Service of which $2,400 will be used for e(l.uip- roent for fire control intensification and $1,100 for technical assistance. Costs of land treatment measures already applied on watershed lands are estimated at $1,205,350. Structural Measures I , ,. The stroctural measures included in the plan consist of five single pur- pose floodwater retarding structures and one grade stabilization struc- ture. The structures will have combined capacities of 13,657 acre~feet for floodwater detention and ICO-year sedil1lent retention. The structures will provide flood protection to 7,182 acres of flood plain land. The estimated installation cost of these structures is $2,231,000. Public Law 566 share is estimated to be $2,168,000. Other foods share is esti. mated to be $63,000. OPEAATl()ll AND MAlNI'ENANCE Land treatment measures will be maintained by the land owners and oper- ators of the private and leased State land on which the lIleasures are installed. The Colorado Division of Game, Fish and Parks will maintain the measures installed on the Wellington State Wildlife Area at an esti- mated annual cost of $5,000. Operation and maintenance of the five floodwater retarding structures and one grade stabilization structure will be the responsibility of the North Poudre Irrigation Cmtpany. Estimated amual costs for operation and maintenance of structural measures are estimated at $3,860. BENEFITS A..'ffi COSTS The average annual benefits accruing to the project are estimated at $264,280. About $11,950 accrue annually to land treatment measures and $252,330 to structural measures. Estimated flood dllJll3ge reduction bene- fits are $159,360, more intensive land use benefits are $11,240 and secondary benefits of a local nature are $21,730. -III- .IV.