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BCP - All American Canal System - Main Page
Facilities in Operation
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Storage Dams |
1 |
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Diversion Dams |
1 |
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Canals |
203 mi |
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Laterals |
463 mi |
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Coachella Distribution System |
495 mi |
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Imperial Distribution System |
1,474 mi |
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Pumping Plants |
16 |
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Drains |
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Coachella |
16.0 mi |
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Imperial |
1,454.5 mi |
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Powerplants |
4 |
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Storage Facilities
Hoover Dam
Diversion Facilities
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Type: |
Concrete slab and buttress, ogee weir |
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Location |
Colorado River, 18 miles northeast of Yuma, Arizona. |
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Construction period: |
1936-1938 |
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Dimensions: |
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Structure height, overflow section |
31 ft |
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Structural Height, nonoverflow section |
85 ft |
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Hydraulic height |
23 ft |
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Base width of weir |
76 ft |
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Crest Width, nonoverflow section |
12 ft |
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Crest Length, overflow section |
1,198 ft |
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Total Length |
3,475 ft |
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Crest Elevation, overflow section |
181.0 ft |
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Crest Elevation, nonoverflow section |
196.3 ft |
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Volume |
196,800 yd3 |
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Spillway |
Overflow ogee weir |
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Overflow capacity at 191.0 ft |
180,000 cfs |
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All-American Canal Headworks
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Type |
Concrete-lined channel 360 feet wide, controlled by four 75- by 23-ft roller gates. Downstream from the gates, four channels direct water into the desilting basins. |
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Location |
Adjacent to California abutment. |
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Construction period |
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Diversion capacity |
15,155 cfs |
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Sluiceway: |
Concrete-lined channel, bottom width ranges from 241.5 to 216 feet, controlled by twelve 16- by 8-feet radial gates. |
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Capacity: |
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At elevation 191.0 ft |
42,500 cfs |
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At elevation 179.5 ft |
31,000 cfs |
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Gila Gravity Main Canal Headworks
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Type |
Concrete-lined channel controlled by three 35.67- by 14.5-ft radial gates. |
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Location |
Adjacent to Arizona abutment. |
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Construction period |
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Diversion Capacity |
2,200 cfs |
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Roadway |
Service bridge consists of a concrete deck carried by 4 plate girder spans 91.5 ft long overall and 76 ft between bearings. The single lane has design load of 20 tons. Maintenance bridge consists of eight 37 ft spans supported on concrete pile bents with concrete caps. |
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All-American Canal Desilting Works
Adjacent to the All-American Canal Headworks, three desilting basins are laid off at an angle of 60 degrees from the intake canal and each is divided into half by a long V-shaped influent channel. The dimensions of each half-basin are 269 ft wide by 769 ft long. Each basin is designed to handle a maximum of 2,000 cfs and each pair of basins is fed by an influent channel. Twelve rotating scraper mechanisms are installed in each half-basin to collect and remove the silt that settles out of the water. The water depth is 12.5 ft. The velocity of water is about 0.25 ft/s. Silt deposited in the basins during the passage of water from influent to effluent channels is removed by means of 72 rotary-type scrapers, each 125 ft in diameter, which force the deposited silt into collecting trenches from which it is flushed into a system of sludge disposal pipes, to the sluiceway channel, and then into the Laguna Settling Basin about 2 mi south of Imperial Dam.
The designed desilting capacity at a canal discharge rate of 12,000 cfs equals 70,000 tons per day; 600,000 to 700,000 yd³ of sediment are removed annually.
Gila Canal Desilting Works, Gila Gravity Main Canal
The Gila Canal Headworks were constructed at the Arizona end of Imperial Dam. Downstream from this structure, the desilting works for the Gila Gravity Main Canal were installed. The Gila desilting works consists of one concrete-lined basin with space allowed for the construction of two additional basins. This basin was designed for desilting a maximum flow of 2,200 cfs. It is formed by two levees extending perpendicularly to the axis of Imperial Dam on either side of the third gate structure of the Gila Canal Headworks. The basin is roughly 1,175 ft long, including inlet and outlet transitions. The bottom width ranges from about 115 to 104 ft between the transitions. The average depth of water is about 20 ft, and the average velocity is 0.66 ft/s. Flow from The basin is controlled by two sets of eight 7- by 16-ft fixed wheel gates, one set located above the other. The upper eight are for diverting and the lower eight are used during sluicing operations. The sluicing water is returned to the river by a curved channel 1,800 ft long. The Gila Canal desilting works are capable of removing about 8,130 tons per day.
Carriage Facilities
All-American Canal - Imperial Division
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Location |
From Imperial Dam west-southwest about 80 miles to the vicinity of Calexico, California. |
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Construction period |
1934-1940 |
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Length |
80 mi |
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Diversion capacity |
15,155 cfs |
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Typical section (earth lined): |
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Bottom width |
160 ft |
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Side slopes |
1.75:1 |
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Water depth |
21 ft |
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Lining: |
Compacted clay on bottom; loose clay on sides. |
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Bottom thickness |
4 in |
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Side thickness |
6 in |
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New River Siphon - All-American Canal
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Location |
At the New River, about 2 miles west of Calexico, California. |
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Construction period |
1937-1938 |
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Description: |
Twin barrels welded 0.5-in thick, plate-steel pipes on reinforced concrete piers resting on reinforced concrete pile footings |
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Length of siphon |
374 ft |
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Diameter each barrel |
15.5 ft |
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Capacity |
2,700 cfs |
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Distribution system:1 |
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Main canals |
235.5 mi |
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Open channel |
224.1 mi |
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Concrete lined |
11.4 mi |
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Lateral canals |
1,472.1 mi |
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Open channel |
686.6 mi |
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Concrete lined |
776.7 mi |
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Pipeline |
8.8 mi |
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1 Constructed and operated by the Imperial Irrigation District. |
Coachella Canal
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Location |
From Drop No. 1 on All-American Canal, about 18 miles west of Yuma, Arizona, northwest to vicinity of Indio, California. |
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Construction period |
1938-1948 |
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Length |
123 mi |
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Diversion capacity |
2,500 cfs |
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Typical section, earth lined: |
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Bottom width |
40-60 ft |
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Side slopes |
2:1 |
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Water depth |
10.3 ft |
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Lining, clay-blanket |
12 in |
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Typical section, concrete lined: |
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Bottom width |
12 ft |
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Side slopes |
1.5 :1 |
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Water depth |
10.8 ft |
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Lining thickness |
3.5 in |
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Coachella Canal Replacement
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Distribution system, underground concrete pipe.
Pipe sizes range from 1 to 7 feet in diameter |
495 mi |
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Pumping Plants
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Designation |
Number of units |
Total capacity, cfs |
Total dynamic head, feet |
Total horsepower |
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Major Pumping Plants |
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Pumping Plant L-1 |
3 |
16.8 |
45 |
120 |
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Pumping Plant L-2 |
4 |
39 |
37 |
230 |
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Pumping Plant L-3 |
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3 |
12.6 |
32.5 |
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1 |
3 |
17 |
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Pumping Plant L-4 |
4 |
46.8 |
40 |
300 |
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Pumping Plant L-5 |
6 |
36.9 |
35-37 |
160 |
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3 |
15.6 |
37 |
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3 |
15 |
35 |
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Pumping Plant L-6 |
2 |
9 |
37 |
50 |
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Coachella 0-1 |
2 |
21 |
38 |
120 |
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Coachella 0-2 |
2 |
6 |
42 |
40 |
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Relift Pumping Plants |
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Lateral 113.0 |
1 |
3 |
11 |
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Lateral 114.3 |
1 |
3 |
9 |
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Lateral 114.8 |
1 |
3 |
7 |
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Lateral 115.3 |
1 |
3 |
10.5 |
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Wistaria No. 1 |
2 |
20 |
7.8 |
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Wistaria No. 2 |
2 |
20 |
3.04 |
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Woodbine Canal |
1 |
9 |
2.74 |
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West Side |
1 |
5 |
2.75 |
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Power Facilities
The Imperial Irrigation District has constructed powerplants at Pilot Knot Check and Wasteway, and at Drop Nos. 2, 3 and 4 of the All-American Canal. Installed capacities of these plants are:
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Pilot Knob |
33.0 MW |
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Drop No. 2 |
10.0 MW |
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Drop No. 3 |
9.8 MW |
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Drop No. 4 |
19.6 MW |
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The district also operates the 189.1 MW steam plant at El Centro. The 75 MW axis steam plant at Yucca is operated by the Arizona Public Service Company, but the Imperial Irrigation District has rights to 25 MW of the plant's production. Imperial's electrical distribution system interties with the Department of Energy's Parker-Davis system.
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