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Munroe Gravity Canal Reservoir System Total Storage 33,454 acre-feet <br />Munroe Gravity Canal Reservoir System Available Storage 30,768 acre-feet <br />Munroe Gravity Canal Reservoir System Unavailable Storage 2,686 acre-feet <br />The active storage under the Munroe Gravity Canal Reservoir System has varied <br />throughout the SPDSS study period of 1950 to present due to reservoir renovations, <br />construction of new reservoirs, and abandonment of reservoirs due mainly to siltation <br />problems. The NPIC reported reservoir capacity for individual reservoirs is presented in <br />Table 1. <br />Reservoir Storage Measurement: Storage levels in Munroe Gravity Canal Reservoir System <br />reservoirs are measured using a staff gage typically located on the reservoir dam. Gage <br />measurements are read monthly by a NPIC employee and reported to the Water District 3 <br />Water Commissioner. Evaporative losses are not charged to any reservoirs under the <br />Munroe Gravity Canal Reservoir System. <br />Reservoir Seepage Information: NPIC estimates 10 to 12 percent seepage loss for its <br />reservoirs under the Munroe Gravity Canal. Losses accrue to Water Supply and Storage <br />Company's System and the Cache la Poudre River. <br />HydroBase Data: The monthly data available in HydroBase over the 1950-2002 period of <br />record pertaining to reservoirs under the Munroe Gravity Canal Reservoir System include <br />the following: <br />End-of--month contents <br />• End-of--month reservoir contents for most of the 1950 - 2002 study period. <br />• Storage records recorded by NPIC personnel and reported to the District 3 Water <br />Commissioner on a monthly basis. <br />6) Fossil Creek Reservoir (Structure ID 0303774) <br />Fossil Creek Reservoir, an off channel reservoir located downstream of the town of Fort Collins <br />and the Horsetooth Reservoir outlet canal and approximately 6 miles northeast of Loveland on <br />the south side of the Cache la Poudre River, represents a unique feature of the NPIC System. <br />Water stored in Fossil Creek Reservoir is not used directly for irrigation in the NPIC System. <br />With the exception of Fossil Creek Reservoir, NPIC's System lies above the Horsetooth <br />Reservoir outlet canal. Due to the location of the reservoir, the only way NPIC can use water in <br />Fossil Creek Reservoir in its System is by exchange or trade with other entities upstream. <br />Construction of Fossil Creek Reservoir began in 1902. In the early 1980's, major improvements <br />were performed for the purpose of optimizing storage space and operations. Fossil Creek <br />Reservoir was originally built as a water exchange mechanism. In 1952, when the water from <br />NPIC's 40,000 C-BT units reached the System, the exchange potential of Fossil Creek Reservoir <br />became instrumental to NPIC operations. In addition to being used for exchange purposes, <br />Fossil Creek Reservoir is currently used by the City of Fort Collins through lease for wildlife <br />viewing. <br />NorthPoudreMemo.doc 16 of 29 <br />