C150368 Approval Letter - Laserfiche WebLink

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North Poudre Irrigation Company Agenda Item 8i October 18, 2013 (Updated October 21, 2013) Page 3 of 5 including the suspension of water deliveries and the eventual sale or forfeiture of shares for failure to pay assessments. Water Rights The water rights impacted by this project include TABLE 1: IMPACTED WATER RIGHTS Name Amount AF Date Adjudication Date Fossil Creek Reservoir 808 _Appropriation 3/1/1862 4/11/1882 Fossil Creek Reservoir 808 9/15/1864 4/11/1882 Fossil Creek Reservoir 808 3/15/1868 4/11/1882 Fossil Creek Reservoir 808 3/20/1873 4/11/1882 Fossil Creek Reservoir 808 4/1/1878 4/11/1882 Fossil Creek Reservoir 808 4/25/1881 4/11/1882 Fossil Creek Reservoir 808 9/28/1914 4/11/1882 Average annual diversions of the Company are 31,700 AF. Average annual diversions through the Fossil Creek Reservoir Inlet Diversion Structure are 5,656 AF. Project Description The goal of this project is to repair /replace the damaged structure to full functionality. North Poudre Irrigation has retained the services of Ronald H. Slosson, P.E. to provide supervision of the project and design services. Ethan Wiechert, P.E. of Earth Engineering Consultants will be providing geotechnical support, Mary Wohnrade, P.E. of Wohnrade Civil Engineers will be providing civil design and flood plain permitting support, and Gary Weeks, P.E. of Weeks and Associates will be providing structural engineering support. King Surveyors will conduct the required surveying. Alternative 1 — Do Nothing: This alternative is considered unacceptable. Without this check structure the Company is unable to deliver its water to Fossil Creek Reservoir. Alternative 2 — Rebuilding Collaboratively with Improvements: Rebuild the structure to increased height and change right abutment headgate. This structure is within the City of Fort Collins and subject to Flood Plain Regulations. Any deviation from historic height of structure will trigger the requirement for flood plain modeling. Changes in the right abutment headgate could benefit downstream conditions. However, this structure needs to be replaced before spring runoff to provide deliveries to Fossil Creek Reservoir, and there is not adequate time to gather information and perform the modeling required to obtain the required permits. Selected Alternative 3 — Replace Damaged Check Structure to Pre -Flood Elevations: The structure will be restored to pre -flood elevations. Changes to the foundation and abutments will be made to prevent future scouring. This Alternative is a replacement of an existing structure and therefore is type of activity that is included in Section 404(f) as being exempt from the Clean Water Act. Consequently, a U.S. Army Corps of Engineers permit will not be required. The estimated engineering and construction cost of this Alternative is $477,000 and is further broken down in Table 2.