Storage Dams

1      

Canals

107 mi  

Laterals

151 mi  

Drainage well fields

3      

Pumping Plants

40      

Transmission Lines

18 mi  

Switchyard

1      

Location

Colorado River from Davis Dam, Arizona-Nevada, to Topock, Arizona, about 32 miles

Construction period

1949-1953  

Channel dredging and rectification

31 mi  

Typical channel section

  Average width of cut

450 ft  

  Average depth of cut

20 ft  

  Average depth of water

18 ft with a maximum flow of 15,000 cfs  

  Maximum depth of water

25 ft  

  Stabilizing eroding riverbanks

12 mi  

  Volume of rock riprap

288,082 yd³  

  Training and jetty fill structures

estimated at 16 mi   

  Volume of dredge spoil

52,531,728 yd³   

Length

47 mi  

Average height

13 ft  

Design flood

   Davis Dam to Piute Wash

50,000 cfs  

   Piute Wash to Lake Havasu

70,000 cfs  

Volume - estimate

29,000,000 yd³  

Access and service roads

106 mi  

Average channel slope

   Upstream of Needles Bridge

0.00024  

   Needles Bridge to Topock

0.00016  

Location

Arizona side of Colorado River near bridge at Needles, to upper end of Topock Marsh.

Construction period

1965-1966  

Description

Three 42-inches asbestos-bonded, corrugated-metal pipes with concrete headwalls and concrete inlet and outlet transitions, Diversion is from Colorado River

Length of each pipe

204 ft  

Diameter of each pipe

42 in  

Diversion capacity

100 cfs  

Gates

Three 42-inches in diameter control gates and three 48- by 42-inches rectangular gates for adjustment of flow measuring orifices.

Location

Extends eastward from intake structure below bridge at Needles to upper end of Topock Marsh

Construction period

1965-1966  

Length

4 mi  

Bottom width

14 ft  

Depth of water

4 ft  

Capacity

100 cfs  

Side slopes

2:1  

Gradient

0.00009  

Annual diversion capacity

41,839 acre-feet  

Surface area of marsh

4,000 acres  

Location

In Topock Dike near lower end of Topock Marsh.

Construction period

1965-1966  

Description

A reinforced concrete structure with four 5-ft stop-log bays for water control and 3-ft fish ladder and battery of flapgates to minimize reverse flows due to river floods

Type:

Earthfill

Location

On the Colorado River, 6-miles south of Needles, California. It consists of a 4-mile long reach extending upstream from Topock Bridge

Construction period

1955-1956  

Length

4 mi  

Typical maximum section

   Structural height

14.0 ft  

   Top width

24.0 ft  

   Crest elevation

460.0 ft  

   Slope: Natural angle of response

10:1  

   Volume

1,016,377 yd³  

Roadway on top of dike:

   Length

4 mi  

   Width

20.0 ft  

   Surfacing

0.5 ft  

Outlet structure

Located in dike near lower end of marsh. It is a reinforced concrete structure with four 5-feet-long lob bays and a 3-feet fish ladder.

Type:

Earthfill structures

Location

About 10 miles downstream from Davis Dam.

Construction period

1959-1960  

Length

1 mi  

Typical maximum section:

  Average structural height

9.0 ft  

  Top width

12.0-20.0 ft  

  Crest length-four structures 

5,820.0 ft  

  Crest elevation

504.0 ft  

  Slope

2:1  

  Volume of rock

21,000 yd³  

  Volume of gravel

26,000 yd³  

Location

About 8 miles south of Needles, California.

Construction period

1965  

Description

Three 42-inches asbestos bonded asphalt dipped corrugated metal pipe with 42-inches in diameter slide gates and 16-feet frames and timber piling.

Length of each pipe

120 ft  

Diameter of each pipe

42 in  

Diversion capacity

100 cfs  

Gates

Three 42 inch diameter control gates.

Location

On Colorado River from Topock, Arizona, to Lake Havasu, about 12 miles.

Construction period

1967-1968  

Channel dredging and rectification⁵

1.7 mi  

Typical channel section:

   Average width of cut

450 ft  

   Average depth of cut

20 ft  

Location

Lake Havasu and the river between Parker and Headgate Rock Dams.

Construction period

1965, 1967, and 1969-1971  

Method of removing and disposing

The snags were removed by mechanical and physical methods, including explosives. The snags were disposed of by sinking waterlogged wood parts. All other parts were removed from the lake to disposal areas to dry and burn.

Total number of snags removed

7,510  

Maximum cut of elevation below the normal operating level of the lake

435 ft  

Normal operation level of the lake during removal

445-450 ft  

Location

Headgate Rock Dam to Palo Verde Diversion Dam, 33 miles

Location

Within the Colorado River Indian Reservation and about 16 miles downstream from Headgate Rock Dam to Alligator Bend.

Construction period

1966-1968  

Stabilizing eroding riverbanks

11 mi  

Volume of rock riprap

235,000 yd³  

Training and jetty fill structures

7.5 mi  

Volume of fill structures

525,000 yd³  

Bridge across river

1      

Service road construction

34 mi  

Width of river channel

500 ft  

Location

From Alligator Bend to Palo Verde Diversion Dam

Construction period

Proposed  

Channel dredging and rectification

21.4 mi  

Volume of land excavation

5,800,000 yd³  

Volume of dredged spoil

11,600,000 yd³  

Volume of rock riprap

516,000 yd³  

Service road construction

53 mi  

Bridges across canals - new

2       

Bridges across canals - reinforced

2       

Width of river channel

500 ft  

Side slopes

1.5 1  

Location

On Arizona side of Colorado River about 5 miles downstream from Headgate Rock Dam and across from Big River.

Construction period

1968-1969  

Deepening backwater by dredging

781,836 yd³  

Outlet structure

1       

Parking unit

1       

Road construction

2.5 mi  

Type:

Deepening of backwater areas by dredging and installation of inlet and outlet structures for fresh water flows.

Construction period

Proposed  

Deepening backwater by dredging

4,660,000 yd³  

Inlet and outlet structures to backwaters

20       

Parking and sanitary facilities

5       

Road construction

24 mi  

Type:

Stabilized banklines and training structures, constructed with land-based equipment.

Location

Palo Verde Dam to Taylor Ferry, 28 miles.

Construction period

1962-1968  

Stabilizing eroding riverbanks

19.5 mi  

Volume of rock riprap

466,000 yd³  

Service road construction

23.6 mi  

Type:

Deepening of backwater areas to enhance fish and wildlife habitat by dredging and constructing inlet and outlet structures to provide fresh water circulation to backwater areas.

Location

Includes areas A-7, A-10, C-5, and C-10.

Deepening of backwater by dredging

2,012,861 yd³  

Inlet and outlet structures for flows

12       

Capacity of each inlet and outlet

30 cfs  

Type:

Backwater area excavation by land-based equipment and an 8 inch dredge to develop a boat marina.

Location

North of Interstate I-10 Bridge, Riverside County, California.

Construction period

1966  

Type:

Training structure and backwater dredging.

Location

7 miles south of Blythe, California, on 26th Ave. and Colorado River.

Construction period

1972  

Type:

Channel excavation and levee construction by dredging

Location

From 2.2 miles below Taylor's Ferry and Adobe Ruin, 24 miles.

Construction period

1964-1970  

Channel dredging and rectification

16 mi  

Typical channel section:

   Average width of cut

450.0 ft  

   Average depth of cut

20.0 ft  

   Average depth of water

7.6 feet at a minimum flow of 10,000 cfs  

   Average depth of water

11.5 feet at a maximum flow of 20,000 cfs  

Volume dredge excavation and levee construction

10,343,00 yd³  

Volume of rehandled dredge and levee material

981,700 yd³  

Riprap

254,400 yd³  

Length

32.2 mi  

Typical section:

   Average height

15 ft  

   Design flood

80,000 cfs  

   Width between levees-varies

750-1,000 ft  

   Volume

6,309,230 yd³  

Levee roads

32.2 mi  

Total access and service roads

51.8 mi  

   Average channel gradient

0.00042  

Location

Lower end of Cibola Valley on the Arizona side near Adobe Ruin.

Construction period

1970  

Volume of dredged material

2,238,300 yd³  

Location

Abandoned river channel from outfall of the Palo Verde Drain to Adobe Ruin.

Construction period

1970  

Description

Extension of Palo Verde Drain to carry drainage water, originating in Palo Verde Irrigation District, to a new outfall into the relocated river channel near Adobe Ruin.

Length of abandoned channel

12 mi  

Width of abandoned channel

150 ft  

Elevation of outfall near Adobe Ruin

210 feet with riverflow of 10, 000 cfs  

Average flow of drain

500 cfs  

Minimum flow

282 cfs  

Maximum flow

577 cfs  

Location

Imperial County, California.

Construction period

1974  

Location

Diversion pool immediately upstream from Imperial Dam near the headworks of the Gila Gravity Canal.

Construction period

Intermittent dredging since 1969  

Location

On the 4.7 miles reach of Colorado River between Imperial Dam and Laguna Dam

Construction period

1963-1965  

Method of construction:

Dredging

Length

0.57 mi  

Maximum depth, when cleaned

24 ft  

Average width

450 ft  

   Sluicing flows

5,000-7,500 cfs  

   Normal flows

Less than 1,000 cfs  

   Other flows

3,000 cfs once or twice a year  

Volume of material removed annually

3,120,000 yd³  

Average water salvaged per year

4,300 acre-ft  

Length

10,000 ft  

Bottom width

90 ft  

Design depth at 5,000 cfs

8 ft  

Volume of riprap

4,200 yd³  

Volume of dredged material removed

1,100,000 yd³  

Volume of other material removed

90,000 yd³  

Length

8,700 ft  

Bottom width

120 ft  

Design depth at 5,000 cfs

10 ft  

Volume of dredged material removed

1,500,00 yd³  

Volume of other material removed

130,000 yd³  

Location

Mittry Lake was formed by Laguna Dam. On east side of original reservoir, it extends from dam upstream to within one mile of Imperial Dam

Construction period

1970-1973  

Method of construction:

Dredging

Land and water area

3,575 acres  

Reduction of Mittry Lake area from 1,200 to about 725 acres.

Deepening 200 acres offshore in the 725- acre lake to minimum depth

10 ft  

Clearing of phreatophytes

940 acres  

Volume of dregded material removed

2,019,000 yd³  

Lake elevation

153.5 ft  

Location

The original river channel from the Gila Gravity Main Canal to the California Sluiceway.

Construction period

Original dredging in 1970; Supplemental dredging in 1973  

Method of construction:

Dredging

  Length of dredged channel

0.5 mi  

  Width

150 ft  

  Depth

12 ft  

  Volume of material removed

125,105 yd³  

Location

From Laguna Dam to the Southerly International Boundary.

Construction period

1951-1952  

Description:

Widening and raising existing Yuma Levee, widening and raising portion of existing Reservation Levee, constructing new stretch of the Reservation Levee around Yuma Island, and new levee and floodway along the Gila River.

Type:

Earth embankment and rock riprap.

Location

Extends along left bank of Colorado River from Yuma, Arizona, to Southerly International Boundary.

Construction period

1951-1952  

Length

23.7 mi  

Dimensions:

  Top width

20 ft  

  Side slopes:

    River side

2:1  

    Land side

3:1  

  Volume of embankment

836,000 yd³  

  Thickness of riprap blanket

5 ft  

  Volume of riprap

247,000 yd³  

  Area protected - Yuma Valley

50,400 acres  

  Design flood

140,000 cfs  

Type:

Earth embankment and rock riprap.

Location

Extends from Laguna Dam along California side of Colorado River to high ground about 4 miles west at Winterhaven, California.

Construction period

1951-1952  

Length

17.4 mi  

Dimensions:

  Top width

30 ft  

  Side slopes:

    River side

2:1  

    Land side

3:1  

  Volume of embankment

898,950 yd³  

  Thickness of riprap blanket

5 ft  

  Volume of riprap

297,000 yd³  

  Area protected - California

21,400 acres  

  Design flood

140,000 cfs  

Type:

Earth embankment

Location

Immediate vicinity of Hanlon Heading on the Alamo Canal.

Construction period

1951-1952  

Length

0.23 mi  

Dimensions:

  Top width

20 ft  

  Side slopes:

    River side

2:1  

    Land side

3:1  

  Volume of new embankment

19,000 yd³  

  Thickness of riprap blanket

5 ft  

  Design flood

140,000 cfs  

Type:

Earth embankment

Location

Two parallel levees down the lower Gila Valley, about 0.5 mile apart with a floodway channel some 200 feet wide between the two levees.  The channel and levees begin below McPhaul Bridge and the channel extends to the developed mouth of the Gila River.  One levee ties to existing North Gila Levee and the other ends at high ground near Yuma.

Length

22 mi  

Dimensions:

  Top width

20 ft  

  Volume of new embankment

1,420,000 yd³  

  Length of excavation

6.75 mi  

  Volume of excavation

2,000,000 yd³  

  Area protected

26,000 acres  

  Design flood

140,000 cfs  

Type:

Concrete lined

Location

Parallels Gila River and south Gila Valley Levee from the Gila River Siphon to 0.5 mile upstream from confluence of Gila River and Colorado River.

Construction period

1960-1962  

Length

7.9 mi  

Capacity

353 cfs  

Typical section, concrete lined:

  Bottom width

8.0 ft  

  Side slope

1.5:1  

  Water depth

4.3 - 6.0 ft  

  Lining thickness

2.5 in  

Location

Extends from end of Main Outlet Drain to below Morelos Dam

Construction period

1963-1965  

Length

12 mi  

Capacity

353 cfs  

Typical section, concrete lined:

  Bottom width

12.0 ft  

  Side slope

1.5:1  

  Water depth

5.8 ft  

  Lining thickness

3 in  

Location

From Laguna Dam to Rockwood Heading

Construction period

1969  

Channel dredging and rectification

17.4 mi  

Laguna to the mouth of the Gila River

   Bottom width

120.0 ft  

   Side slope

1.5:1  

   Gradient

0.000230  

Mouth of the Gila River to Rockwood Heading

   Bottom width

150.0 ft  

   Side slope

1.5:1  

 Gradient

   Mouth of the Gila River to California Wasteway

0.000230  

   California Wasteway to Rockwood Heading

0.000095  

Design flow of channel

5,000 cfs  

Grade control structures

2       

Average flow

   Laguna Dam to the mouth of the Gila River

250 - 300 cfs  

   Mouth of the Gila River to California Wasteway

400 - 450 cfs  

   Below California Wasteway

700 - 1,500 cfs   

Average depth at flow of 300 cfs

2.3 ft  

Average depth at flow 700 cfs

3.0 ft  

Volume of dredge spoil

4,213,000 yd³  

Volume of rock riprap

264,000 yd³  

Road construction

41.0 mi  

Clearing

2,200 acres  

Location

East side of Yuma Valley near toe of Yuma Mesa

Construction period

1965  

Number of wells

6  

Average depth

180 ft  

Diameter of well surface

24 in  

Total annual production:

  Maximum design

31,500,000 acre-ft  

  Average yearly

10,000,000 acre-ft  

Designation

Number of Units

Total capacity, cfs

Total dynamic head, ft

Total horsepower

YVI-7

1

  4.4

61

40

YVI-13

1

12.0

59

125

YVI-23

1

  8.0

57

75

YVI-25

1

  8.0

67

100

YVI-27

1

  2.8

67

30

YVI-28

1

  8.3

64

100

Type:

Concrete

Location

An open collector channel that collects the discharge from Yuma Valley Wells Nos. YVI-25, -27, -28, and Yuma County Water Users´ Well Nos. 17-1/2 Street and 18-1/4 Street and conveys the drainage water north to the Southeast Drain.  This drain discharges into the Main Drain of the Yuma Project.

Construction period

1965  

Length

1.2 mi  

Capacity:

  Maximum

26 cfs  

  Minimum

8 cfs  

Typical section, concrete lined:

  Bottom width

2 ft  

  Side slope

1:1  

  Depth

3 ft  

  Lining Thickness

3 in  

Slope of bottom:

  Maximum

0.0008  

  Minimum

0.0001  

Type:

Gravel-packed, cased and screened

Location

About 4 miles southeast of Yuma, Arizona, between the north toe of Yuma Mesa and the Gila River; extends from below Gila River Siphon to below confluence of the Gila and Colorado Rivers.

Construction period

1961-1964  

Number of wells

24  

Average depth of wells, varies

160 - 300 ft  

Normal diameter of wells at surface

30 in  

Casing:

Protective casing nominal diameter 3 to 15 feet below concrete slab and 1.33 foot above ground surface.  A 20 inches inside diameter, 50 feet linear section reduced to 127 feet of 16 inches linear pipe and screen.

Total annual production

55,000 acre-ft  

Average salinity of drainage water

2,200 part per million  

Designation

Number of Units

Total capacity, cfs

Pumping Level, ft
Actual/Initial

Total Horsepower

  SG1

1

  7.8

34 / 22

40

  SG2

1

  9.0

38 / 32

60

  SG3

1

  9.0

35 / 20

30

  SG4

1

11.0

32 / 26

60

  SG5

1

10.0

30 / 12

60

  SG6

1

11.0

28 / 32

60

  SG7

1

  9.0

30 / 39

75

  SG8

1

  9.0

37 / 35

60

  SG9

1

  9.0

28 / 20

60

  SG10

1

11.0

52 / 42

60

  SG11

1

11.0

45 / 40

100

  SG12

1

  9.5

55 / 42

60

  SG716

1

  7.8

34 / 36

60

  SG717

1

  8.0

32 / 36

60

  SG718

1

  9.0

27 / 30

60

  SG719

1

  9.0

24 / 29

60

  SG720

1

10.0

23 / 31

60

  SG721

1

  9.0

33 / 37

60

  SG713

1

  6.7

50 / 37

60

  SG714

1

  7.4

40 / 41

60

  SG709

1

  8.5

49 / 52

50

  SG711

1

10.0

24 / 40

100

Location

In South Gila River Valley about 4 miles southeast of Yuma, Arizona.

Construction period

1961  

Length

3.44 mi  

Open Channel

3.40 mi  

Pipeline

0.04 mi  

System capacity for eight wells

SG1, 2,3,4,9,11,12, and well 716  

  Maximum

40 cfs  

  Minimum

8 cfs  

Typical section - open channel

  Bottom width

2 ft  

  Side slope

1.5:1  

Water depth: 

  Maximum

3.5 ft  

  Minimum

1.5 ft  

  Lining concrete

2 in  

Typical section - pipeline

   Type:

PCP pipe

   Length

0.04 mi  

   Size

30 in  

Location

In South Gila River Valley about 5.5 miles east of Yuma, Arizona

Construction period

1961-1965  

Length

2.72 mi  

Open channel

2.62 mi  

Pipeline

0.10 mi  

System capacity for six wells

SG5,6,7,8,10, and well 717  

   Average

50 cfs  

Typical section - open channel

  Bottom width

2 ft  

  Side slope

1.5:1  

  Water depth:

    Maximum

3.4 ft  

    Minimum

1.6 ft  

  Lining concrete

2 in  

Typical section - pipeline

  Type:

PCP pipe

    Length

0.10 mi  

    Maximum diameter

36 in  

    Minimum diameter

24 in  

Location

In South Gila River Valley about 7 miles east of Yuma, Arizona

Construction period

1964  

Length

5.8 mi  

  Open channel

1.8 mi  

  Pipeline

4.0 mi  

System capacity for six wells

Nos. SG713, 714, 719, 720, and 721  

   Average

60 cfs  

Typical section - open channel

  Maximum

7.0 ft  

  Minimum

3.0 ft  

  Side slope

1.5:1  

  Water depth:

    Maximum

3.4 ft  

    Minimum

2.6 ft  

  Lining concrete

2 in  

Typical section - pipeline

  Type:

Cast-in-place concrete pipe

  Length

4.0 mi  

  Maximum diameter

42 in  

  Minimum diameter

24 in  

Location

In South Gila River Valley about 2 miles east of Yuma, Arizona

Construction period

1965  

Length

3.4 mi  

  Open channel

0.6 mi  

  Pipeline

2.8 mi  

System capacity for four wells

Nos. 708, 709, 710, and 711  

   Average

40 cfs  

Typical section - open channel

  Bottom width

6 ft  

  Side slope

1.5:1           

  Water depth, varies

1.0 - 2.0 ft  

  Lining concrete

2 in  

Typical section - pipeline

  Type:

Precast concrete

  Length

2.8 mi  

  Maximum diameter

42 in  

  Minimum diameter

24 in  

Location

Along the western edge of Yuma Mesa about 2 miles south of Yuma, Arizona.

Construction period

1968-1971  

Number of wells

12  

Depth of wells, varies

189 - 286 ft  

Diameter of wells at the surface

24 in  

Maximum total capacity of the wells

100 cfs  

Total annual production

60,000,000 acre-ft  

Salinity of the pumped water

1,330 parts per million  

Designation

Number of Units

Total Capacity, cfs Actual/Initial

Total Dynamic Head, ft

Total Horsepower

YM-2

1

1.5 / 8.5

131.4

100

YM-3A

1

7.0 / 9.8

112.7

125

YM-4

1

2.0 / 8.1

138.8

200

YM-5A

1

5.5 / 7.3

114.3

200

YM-6

1

5.5 / 7.9

140.1

125

YM-7

1

5.0 / 8.8

127.3

150

YM-8

1

6.5 / 6.7

126.8

  75

YM-9

1

5.5 / 8.2

136.8

200

YM-10

1

9.0 / 9.4

148.1

250

YM-11

1

9.0 / 9.1

153.7

150

YM-12

1

9.0 / 8.9

155.5

150

YM-13

1

8.5 / 7.3

154.3

200

Type:

Reinforced concrete pressure pipe

Location

Extends from the center of the south line of Section 23, T.10S., R.24W., G&SRM, to a point on the Colorado River about 2.5 miles northwest of Yuma, Arizona.

Construction period

1967-1968  

Total length of pipeline

Length of mainline

14.7 mi  

Length of collector lines

5.1 mi  

Diameter of main conduit

24 - 66 in  

Diameter of collector conduit

18 - 24 in  

Capacity of main conduit

  Maximum

125.0 cfs  

  Minimum

7.6 cfs  

  Velocity

2.6 - 5.5 cfs