A0002_Att_5_(New)_01_14_20_-_Reservoir_Spillway_and_Outlet_Works_Operations_0002.pdf
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- Attached to
- Hyrum Dam Spillway Replacement
- Solicitation number
- 140R4024R0020
About this file
This document is a section from the specifications for the Hyrum Dam Spillway Modifications project. It describes the existing reservoir, spillway, and outlet works facilities, as well as the reservoir and spillway operations during the construction period.
The key details are:
- The reservoir is operated and maintained by the South Cache Water Users Association, with no restrictions or accommodations for construction.
- The existing outlet works has a capacity of 100 cfs, and the dam creates a reservoir with a total capacity of approximately 17,746 acre-feet.
- Two canals cross the alignment of the new and existing spillways, with maximum flows of 15 cfs and 45 cfs.
- The existing spillway gates will remain open until approximately May 1, then closed to store spring runoff for the irrigation season, which is typically from April 1 to October 1.
- The Government assumes no responsibility for the Contractor's conclusions based on the information provided.
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Text version
Hyrum Dam Spillway Modifications Hyrum Project, Utah
Reservoir, Spillway and Outlet Works Operations
01 14 20 -1
SECTION 01 14 20
RESERVOIR, SPILLWAY, AND OUTLET WORKS OPERATIONS
PART 1 GENERAL
1.01 RESERVOIR OPERATOR
A. The Reservoir is operated and maintained by the South Cache Water Users Association (SCWUA). No reservoir restrictions or accommodations for construction will be made.
1.02 EXISTING FACILITIES
A. The facilities associated with the dam include the outlet works, spillway, and the canals (including the canal siphons). Water to the canals is provided by the outlet works.
B. The current outlet works capacity is 100 cfs.
C. The dam creates a reservoir with a total capacity of approximately 17,746 acre-feet, and a surface area of approximately 480 acres at elevation 4672.5.
D. Two canals cross the alignment of the new and existing spillways; the Hyrum Feeder Ditch Pipeline supplies a maximum of 15 cfs and the East Field Canal supplies a maximum of 45 cfs.
1.03 RESERVOIR AND SPILLWAY OPERATIONS DURING CONSTRUCTION
A. Hyrum Reservoir levels fluctuate yearly to store runoff and make irrigation releases.
Elevations will also fluctuate depending on weather conditions at Hyrum Dam or in the upstream basin.
B. See Section 51 00 10 for Reservoir Data.
C. The Government assumes no responsibility for deductions, interpretations, or conclusions made by the Contractor based on information made available by the Government, in accordance with the clause of FAR 52.236-3 “Site Investigations and Conditions affecting the Work”.
A. Construction Time Intervals:
a. The existing spillway gates will remain open until approximately May 1 then closed to store spring runoff for the irrigation season. Closure date varies each year. Please coordinate with dam tender.
B. Approximate irrigation season is April 1 to October 1.
Hyrum Dam Spillway Modifications Hyrum Project, Utah
Reservoir, Spillway and Outlet Works Operations
01 14 20 -2
PART 2 PRODUCTS
Not Used
PART 3 EXECUTION
Not Used
END OF SECTION
File details come from the government source that posted it. Updated .