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Pueblo Dam & Reservoir
The terminal storage facility, Pueblo Dam and
Reservoir, is located on the Arkansas River in Pueblo County about six miles
upstream and west of the city of Pueblo. The reservoir has a total storage
capacity of 357,678 acre-feet: 30,355 acre-feet of dead and inactive
capacity; 234,347 acre-feet of conservation capacity; 65,952 acre-feet of
joint-use capacity; and 27,024 acre-feet of exclusive flood-control capacity.
The concrete dam and massive-head buttress-type
spillway structure is the principal control structure for the reservoir.
The concrete section is 1,750 feet wide with a maximum structural height of 250
feet. The spillway has a crest width of 550 feet and was designed for a
maximum spill discharge of 191,500 cubic feet per second. The river outlet
works is controlled by two 4-foot-square high-pressure gates and regulate normal
water releases into the river. Additional releases may be made to the
river through three separate spillway outlet works. Two 6-by-6.5-foot
high-pressure gates control each outlet work.
The south inlet works was designed and
constructed to deliver water for municipal and industrial use is made from the
south outlet works, a multilevel intake structure capable of taking water from
the reservoir at different levels, thus providing a degree of control over water
temperature and quality. Water deliveries from the fish hatchery outlet
works have similar controls. Included in the outlet works are the outlet
channel, a concrete river plug in the river channel, and the Bessemer Ditch headwork's.
Pueblo Dam
Type: Earthfill dam with massive concrete buttresses
with overflow section
Location: On the Arkansas River 6 miles west of Pueblo, Colorado
Construction period: 1970 - 1975
Pueblo Reservoir:
Total Capacity to Elevation 4898.7: 357,678 acre feet
Active capacity: 327,323 acre feet
Surface area: 5,664 acres
Dimensions:
Height above streambed: 191 feet
Top width: 30 feet
Maximum base width: 1,040 feet
Crest length: 10,200 feet
Crest Elevation: 4925.0 feet
Total Volume:
Concrete: 540,000 cubic yards
Embankment: 12,000,000 cubic yards
Excavation: 2,800,000 cubic yards
Spillway: An uncontrolled, overflow type spillway crest is provided with
converging training wall and concrete flip bucket.
Crest Length: 550 feet
Crest Elevation: 4898.7 feet
Capacity at Elevation 4919: 191,500 feet
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