DEPARTMENT OF THE INTERIOR
BUREAU OF RECLAMATION
REGION 3
A. B. West, Regional Director
LOWER COLORADO RIVER MAPS
COLORADO RIVER FRONT WORK AND LEVEE SYSTEM
ARIZONA-CALIFORNIA-NEVADA
October 1969 PLATE I
Laguna Division Mohave Volley Division 1 Topock Havasu Division Parker Division Polo Verde Division Cibolo Division I Imperial Division Yuma I Limitrophe Gorge 1 Division Division Division
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UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION 10 0 1 0 20 REGION 3 SC ALE OF MILES OPERATIONAL DIVISIONS LOCATION MAP
DRAWN _it ------SUBMITTED ------
TRACED ------RECOMMENDED ...... CHECKED AVM APPROVED ...... KEY MAP BOULDER CITY, NEV. SEPT. 5,1969 I 423-300-829 ABSTRACT
This booklet of maps contains information on the Bureau of Reclamation's
Colorado River Operation and Maintenance (O&M) Program. The program is being carried out under the authority of the Colorado River Front Work and Levee System Act of January 21, 1927, and subsequent amendments thereto.
For administration purposes, the Colorado River below Davis Dam has been divided into ten operational Divisions as shown on the frontispiece map.
The work which has been completed thus far, as well as future work which is in the advanced planning stage, is shown on the facility maps of the respective Divisions. To aid in reading these facility maps, a key to the symbols used is included.
For information purposes, a brief introduction to the problems leading up to an active operation and maintenance program is provided. The goals to be achieved by the work are also set forth. This is followed by a more detailed discussion of the problems inherent to each Division, the steps which are being taken to successfully resolve them, and the benefits which accrue from project features. TABLE OF CONTENTS
PAGE
ABSTRACT
COLORADO RIVER OPERATION AND MAINTENANCE (O&M) PROGRAM ...... 1
Introduction ...... 1
Mohave Valley Division ...... 3
Topock Gorge Division ...... 5
Havasu Division ...... 8
Parker Division ...... 9
Palo Verde Division ...... 12
Cibola Division ...... 13
Imperial Division ...... 14
Laguna Division ...... 17
Yuma Division ...... 18
Limitrophe Division ...... 20
KEY TO SYMBOLS ...... 21 TABLE OF CONTENTS (CONTINUED)
LIST OF DRAWINGS
TITLE DRAWING NO. PLATE NO.
Operational Divisions - Location Map 423-300-829 Plate 1 (Frontispiece)
Mohave Valley Division - Facility Map 423-306-1185, 1186 Plate 2
Topock Gorge Division - Facility Map 423-306-1187 Plate 3
Havasu Division - 423-300-804, 805 Facility Map 806, 808 Plate 4
Parker Division - Facility Map 423-306-1188, 1189 Plate 5
Palo Verde Division - Facility Map 423-306-1190 Plate 6
Cibola Division - Facility Map 423-306-1191 Plate 7
Imperial Division - 423-306-1192, Facility Map 1193 Plate 8
Laguna Division - Facility Map 423-306-1194 Plate 9
Yuma Division - Facility Map 423-306-1195 Plate 10
Limitrophe Division - Facility Map 423-306-1196 Plate 11 COLORADO RIVER OPERATION AND MAINTENANCE (O&M) PROGRAM
Introduction
In its natural state, the Colorado River flowed unchecked from the snowcapped Rocky Mountains of Colorado to the Gulf of California in Mexico. In the early years of American history, it was considered a natural menace. It tore through desert lands, flooded agricultural fields, and inundated villages. The magnitude of the riverf lows alternated between ravaging floods in the spring to a mere trickle in late fall.
Western water planners, particularly those in California, supported the Bureau of Reclamation in doing something to control and harness the energy of the river. Consequently, a series of dams were built; namely, Hoover, Imperial, Parker, and Davis. However, construction of these regulatory structures resulted in secondary problems which assumed great importance. While the flow of the river had been regulated, instability of the river channel itself had not. It was necessary for the river to undergo significant changes as it adjusted to its new environment. Each reservoir, acting as a sediment trap, cleared up the muddy water and released clear water which then picked up sediment that had been deposited by earlier floods. The silt thus picked up moved downstream and was deposited on the riverbed in the slow-moving water at the head of the next reservoir. Thus the reaches of river below the dams were scoured and deepened whereas other reaches such as in Topock Gorge and the reach of river above
Imperial Dam were raised by extensive sediment deposits. The effects of the raised riverbed in Topock Gorge extended north to the City of
Needles where a portion of the city became inundated. This emergency situation at Needles led to new legislation designed to deal with river problems along the entire lower river below Hoover Dam. Existing authority under the Colorado River Front Work and Levee System Act was expanded in 1946 to permit the Bureau of Reclamation to initiate an active Colorado River Operation and Maintenance (O&M) Program.
The initial goal of the work was to prevent flooding and destruction of lands resulting from meander of the river and deposition of sediment in the river channel. It was soon apparent, however, that other objectives needed to be incorporated in project plans such as salvage of water, stabilizing and enhancing fish and wildlife habitat, and improving recreational opportunities. To meet these goals, comprehensive planning reports have been prepared using multiple-purpose planning concepts for attainment of maximum overall
2 project benefits. Such multiple-purpose planning sometimes limits the attainment of single-purpose objectives such as the accomplish- ment of the greatest possible water salvage or the greatest possible recreational value. In multiple-purpose planning, each single-purpose objective is given weighted consideration so that the overall public benefits may be maximized.
For administration purposes, the lower Colorado River below Davis Dam has been divided into ten Divisions as shown on the frontispiece map.
The status of the program in each Division of the Colorado River Front
Work and Levee System is discussed below.
Mohave Valley Division
Scouring of the river channel below Hoover Dam by the clear water released from the reservoir, and subsequent deposition of the sediment thus eroded in the zone of backwater influence of Parker Dam, created a problem of severe aggradation in the lower Mohave Valley. Prior to
1946, aggradation of the channel in the lower valley caused a rise in average water levels until there was serious flooding near Needles and the threat of worsened conditions. Channel stabilization was initiated in 1949 with initial work consisting of dredging of an improved channel between Needles and Topock.
3 This work and associated levee construction eliminated the immediate
threat to Needles. However, it did not, by itself, provide the river
stability between Davis Dam and Topock which was needed to assure
that the problem would not recur. Channel dredging, levee construction,
and associated work were subsequently accomplished upstream from Needles
to a point about 10 miles below Davis Dam to reduce the pickup and
transport of sediment. A settling basin was also constructed in the
river above Topock to trap the sediment arriving from upstream sources
and prevent it from depositing in Topock Gorge. A 12-inch dredge has
been used in the basin for removal of sediment deposition. As a result
of this work, the needed stability of the channel was achieved and water
levels at Needles were brought under control.
Related work for the improvement of fish and wildlife habitat and
recreational features has also been provided. Topock Marsh, which came
into existence after the closure of Parker Dam and the filling of
Lake Havasu in 1938, has been encompassed with a dike to maintain water
levels at elevation 455 feet. At this water height, approximately
4,000 acres of open water are available for fisheries and wildlife manage-
ment. Inlet and outlet structures were constructed to supply water
apportioned to the Havasu National Wildlife Refuge. The Bureau
of Reclamation participated in the development of Park Moabi Marina
4 below Needles. Popularity of the Marina has increased each year since
its construction.
Future work in this Division will pertain primarily to maintenance of
constructed features. Other minor work which may be beneficial to
channel stability or improvement of fish, wildlife, and recreation may
be undertaken consistent with long-range plans.
Aside from the benefits to fish and wildlife and recreation, the
constructed features will reduce the sediment transport into Topock Gorge
and Lake Havasu by about 121,000 tons per year. Water salvage of
109,000 acre-feet each year is also a primary benefit. However, the
full benefit of water salvage will not be realized until the lowered
river stage in the lower Mohave Valley Division has been regained by
work in the Topock Gorge Division.
Topock Gorge Division
Before river stabilization work was undertaken in the Mohave Valley
Division, heavy deposits of sediment were laid down in Topock Gorge
and in the upper end of Lake Havasu. During correction of the high-water
conditions which existed at Needles prior to 1951, it was recognized
that sediment deposits in the Topock Gorge Division were an
important factor leading to the high-water levels which existed from Topock, Arizona, north beyond Needles. Channel dredging in the river in the Topock Gorge Division was recognized as an eventual requirement.
One of the primary goals of the comprehensive plan in this Division is improvement of the channel by dredging to increase its hydraulic efficiency. Aside from establishing stability in river water levels at Topock, the work will assure permanence of water salvage and other benefits which have been accomplished by earlier work in the
Mohave Valley Division. At the same time, it will provide additional benefits of water salvage and sediment control in both the
Mohave Valley and Topock Gorge Divisions. The plan also includes important fish and wildlife and recreational features.
During the planning of project features, much effort was expended in determining means to reduce the visible effect of the dredged material to be deposited outside the channel. Due to cooperative work by the Bureau of Sport Fisheries and Wildlife, the Lower Colorado River
Office, the Bureau of Reclamation, and state fish and game agencies, it has been found most practicable to confine deposits of excavated sediment to small selected areas of low profile whose appearance would be naturalized by careful grading and revegetation. In order to preserve
6 the natural beauty of the scenic Gorge itself, excavated materials
would be moved to sites well removed from the more scenic areas. Below
Blankenship Bend, the excavated material would be used to complete low
dikes now being formed by natural processes. These dikes would protect
the backwater areas from further siltation. Openings in the dikes at
selected locations would provide for freshening flows in the
off-channel areas for fish and wildlife habitat.
Due to opposition to Reclamation's comprehensive plan by certain
outdoor oriented groups and individuals, Secretary Udall approved a
modified dredging plan for the Topock Gorge Division. This plan, as
outlined in the August 1967 plan report, limited initial dredging and related work to the upper 1.7 miles and the lower 4.0 miles of the design channel. Work in other reaches of the Division was deferred
pending a determination of the effects of the initial work on water
levels at Topock. Work in the upper reach was started in October 1967.
This reach was never completed, however, and renewed opposition to the program resulted in a Secretarial directive suspending the work in
June 1968. The Bureau of Reclamation and the Bureau of Sport Fisheries and Wildlife simultaneously were instructed to further evaluate the physical and ecological changes taking place in the river, especially below Blankenship Bend.
7 Benefits associated with development of the full plan as outlined in the report include: permanent stability of the river channel from
Needles to the wide mouth of Lake Havasu; efficient transport of sediment through Topock Gorge into the wide, deep areas of Lake Havasu; salvage of
28,000 acre-feet of water annually; insuring the permanency of a total salvage of 109,000 acre-feet yearly in the Mohave Valley Division; lowering of water levels at Topock to provide needed flexibility in the manipulation of water levels in Topock Marsh for fish and wildlife management; control of sediment movement to minimize siltation of backwater areas which provide valuable fish and wildlife habitat; and deepening of 300 acres of selected backwaters to improve fishery habitat and prevent encroachment of tules and cattails.
Havasu Division
The Havasu Division was recently established to maintain contiguity of river segments, and to facilitate administration of snag-removal work in Lake Havasu. The new Division covers all of Lake Havasu and
the river from Parker to Headgate Rock Dams.
The hazard of the snags (submerged trees) in Lake Havasu has arisen
because the reservoir area was not cleared prior to closure of
Parker Dam in 1938. Clearing was not considered important at that
time, since the reservoir was located in a remote, desolate area.
recent years, however, developments along the Colorado River have attracted thousands of people to Lake Havasu, with boating and
waterskiing replacing fishing as the dominant recreational activity.
A number of accidental deaths has occurred on the lake. In several
of these, the snags have been a factor influencing the occurrence of the
accident.
In 1964, discussions were initiated with fish and wildlife and
recreation representatives, as well as the U. S. Coast Guard, to
explore means of protecting the general public from the hazardous
conditions caused by the snags. Fish and game agencies proposed that
the snags be preserved and marked with navigational aids, but no
practicable way was found to eliminate the hazards without removal of
the snags.
It was concluded that a snag removal program should be undertaken as
expeditiously as possible. The removal of all snags in the reservoir
area should be complete in 1970.
Parker Division
Many reaches of the river in the Parker Division are subject to
active bank erosion, meandering, braiding, and particularly in the
lower part of the Division, deposition of sediment. As a result of
these actions, the river is shallow, unstable, and generally unsuitable
for use in water-oriented developments. The movements of the river have caused large quantities of sediment to be picked up and transported to downstream reaches. Valuable riverfront lands have also been lost by bank erosion, which in some areas has amounted to 45 feet laterally each year. Materials thus eroded have been deposited in Imperial Reservoir, or handled through the
All-American Canal Desilting Works and transported downstream to
Mexico until a sediment trap was built below Imperial Dam. Sediment sampling records indicate that approximately 73 percent of the sediment load is presently being trapped in Imperial Reservoir, and the remainder is being removed by the Desilting Works and the
Laguna Settling Basin.
The principle objectives of work outlined in the Parker Division comprehensive plan are: (1) to improve and stabilize the alinement of the river channel; (2) to reduce the loss of water from the river; (3) to reduce the erosion of riverfront lands; (4) to reduce the quantity of sediment arriving at Imperial Reservoir; (5) to preserve habitats for fish and wildlife; and (6) to preserve and enhance the recreational resources of the river and adjoining lands.
Due to the greater urgency for the work in the river between Parker and
Alligator Bend, where contracts and leases for recreational development
of this area have been negotiated and land development work is in
10 progress, the basic channel improvement work in this section was completed in 1967. Stabilization of this reach of the river will now permit full development as planned by the Colorado River Indian
Tribes. In this section above Alligator Bend, stabilization of the river was accomplished by confining overwide reaches of the river between training structures or stabilized banklines. All work was
performed by land-based equipment.
Below Alligator Bend, the plan calls for stabilization of the channel by dredging the riverbed to produce a somewhat deeper channel and more uniform gradient. Channel alinement will be improved and banklines will be stabilized. The abandoned reaches of channel will be filled with material from dredging, to the maximum extent practicable, to provide for water salvage.
Because of the distance from the new channel or because of limitations imposed by the amount of excavated materials available for filling, several backwater areas will remain after the channel work. These areas constituting a total of 500 acres will be deepened by dredging to create permanent fish and wildlife and recreational values. Additionally, about 100 acres of isolated river channel will remain as minor backwaters principally in the
11 area north of Alligator Bend. Periodic dredging, or other maintenance work will preserve these areas as suitable sites for fish-spawning and -feeding areas. The major backwater in the Deer Island area has already been dredged in keeping with plans developed by fish and wildlife and Indian interests.
One of the primary benefits of the work will be the salvage of
24,200 acre-feet of water annually. Also, the portion of the sediment arriving at Adobe Ruins from the Parker Division will be reduced by
788,000 toms yearly. Consequently, less siltation will occur in the backwaters of the Imperial Division, and less sediment will be handled in the Desilting Basin and Laguna Settling Basin. Fish, wildlife, and recreational values will be preserved and enhanced.
On September 19, 1969, the Department of the Interior approved the comprehensive plan for the Parker Division. However, the remaining work has been deferred due to uncertainty as to the location of the western boundary of the Colorado River Indian Reservation.
Palo Verde Division
Except for routine maintenance and repair of constructed features, the channel stabilization in the Palo Verde Division is essentially complete. The work consisted primarily of earthf ill training structures
12 and bank protective riprap designed to prevent future meandering of the river in this Division.
Many of the selected backwater areas behind the fill training structures
are being improved to benefit fish and wildlife. Culverts have been
installed to provide freshening flows. At the, present time, the
dredge "Little Colorado" is deepening the off-channel areas in accordance with plans developed by the fish and game agencies in
Arizona and California.
In addition to 10,000 acre-feet of water salvage annually, the completed work will result in a reduction of the sediment load originating in
the Palo Verde Division by 310,000 tons each year. This reduction will
result in less material arriving at Imperial Dam and Reservoir.
Cibola Division
Through much of the Cibola Division, the natural channel is shallow as
the result of sediment deposition. A program to correct
channel deficiencies by dredging and construction of levees is presently
under way. Supplementing this program, Reclamation is constructing
major features to preserve fish and wildlife in the area as recommended
by fish and wildlife agencies. The first of these features, the inlet and outlet structures to the newly formed Oxbow Lake south of
Palo Verde Townsite, has been completed. The Oxbow Lake is an abandoned reach of the natural channel cut off by the realined dredged channel.
Other areas which may be improved for fish and wildlife are
Three Fingers Lake and Cibola Lake. Final plans for these areas are currently being prepared by the Bureau of Sport Fisheries and Wildlife.
When completed, the work in the Cibola Division will provide
36,000 acre-feet of water salvage each year. In addition, this work will reduce the sediment passing into the Imperial Division by
350,000 tons yearly.
Imperial Division
The Imperial Division constitutes the diversion pool and associated
backwater areas behind Imperial Dam. It is the recipient of the sediment generated in the Parker, Palo Verde, and Cibola Divisions.
The sediment load presently arriving in the Imperial Division is continually being deposited largely in areas outside the main channel on sandbars or in backwater lakes (about 73 percent of the total) or is diverted at Imperial Dam (about 27 percent of the total).
Most of the diverted sediment is removed from water in the
All-American Canal by the Desilting Works, returned to the river below
Imperial Dam and dredged to permanent storage areas on dry land near the Laguna Settling Basin just above Laguna Dam.
14 Since closure of Imperial Dam, a number of the backwater areas, particularly in the upper end, have been filled by sedimentation.
Others have been sealed off from the river by natural dikes which the river has formed. Generally, the deeper backwater areas which remain are located in the lower one-third of the Division where the water initially was deeper and sediment deposition is less advanced.
However, a short reach of the diversion pool immediately upstream from the Dam is full of sediment, and in recent years it has been difficult to divert water into the headwork* of the Gila Canal.
As the accumulation of sediment in the Imperial Division continues to fill or isolate off-channel areas, the trap efficiency of the
Reservoir will lessen. More sediment will then arrive at Imperial Dam and need to be removed by the All-American Canal Des ilting Works.
There have been indications that the trap efficiency of the Reservoir has decreased in recent years.
Prime fish and wildlife and recreational backwaters are being destroyed by the effects of sedimentation. As soon as the depth of water is reduced to 2 or 3 feet, cattails and tules overrun the open water. Some backbays have been isolated from the river by the
formation of natural dikes. Without the benefit of freshening flows in
these areas, there is increased risk of stagnant and salty water.
15 In the planning for the Parker, Palo Verde, and Cibola Divisions, reduction of the amount of sediment flowing into the Imperial Division was a major objective. The Bureau of Reclamation has a continuing program of data collection and processing on sediment transported by the river so that the needs can be defined, appropriate corrective measures can be instituted, and the results of control measures can be adequately evaluated.
While Reclamation has provided ad hoc treatment of recent local problems in the Imperial Division, planning of a comprehensive program within the Division has not been initiated. Rather, past and present - efforts have been directed toward the very fundamental problem of reducing the sediment inflow into the Division.
There have been many recent expressions of interest in, and a growing concern for, problems in the Imperial Division. Among the problems which have been identified are the increasing quantity of sediment arriving at Imperial Dam, the continuing loss of backwater areas valuable for fish and wildlife and recreation uses, the need to minimize water-quality deterioration (increase in salinity) within the Division, and the need to eliminate noubeneficial water losses.
Investigations which may be undertaken in the Imperial Division will be performed under the continually expanding concepts of multiple-purpose planning. All agencies having an identifiable interest in the
16 Imperial Division will be invited to assist in evaluating the nature and scope of the problems within the Division and to suggest remedial measures thought to be worthy of detailed study.
Earlier reconnaissance grade studies indicate that water losses in the Imperial Division are about 110,000 acre-feet per year and that these losses night be reduced by about 15,000 acre-feet per year through reasonable measures.
Laguna Division
The Laguna Division receives sediment bypassed by the Imperial sluice gates and, in recent years, has received large quantities of sediment returned from the All-American Canal Desilting Works. Because of the need to conserve water, the scheduling of large sluicing flows necessary to carry the sediment downriver to the Gulf of California has not been possible. Consequently, the Bureau of Reclamation constructed a settling basin in the Laguna Division where sediment from upstream sources is trapped and pumped out for storage on dry land by use of a dredge. Removal of sediment from the settling basin will be necessary for a number of years, but the need will diminish as the beneficial effects from upstream work become apparent.
Covering of marshy areas by dredged material will result in the salvage of 10,000 acre-feet of water per year.
17 Yuma Division
The river channel, extending from Laguna Dam to the upper end of the
diversion pool above Morelos Dam, has been formed by flows of
moderate volume during times when there was water in excess of the
needs of water users. In the future, the river will be a small
stream with a typical volume of flow between 100 and 1,000 cfs, depending
upon the time of year and the location within the Division. Due in
large part to the low flows in recent years, the channel is no longer
hydraulically efficient. Shallow depths and overwide sections waste
water by evapotranspiration from wet soils and phreatophytes, and the
river is generally unattractive as the nucleus for future development.
The Bureau of Reclamation plans to modify and stabilize the rivet
channel to efficiently convey both the normal low flows and the
infrequent floodf lows which are expected to be characteristic of
future conditions in the Yuma Division. This will be accomplished
by dredging to lower the riverbed and to provide flatter gradients
and a narrower section. This work will reduce the water surface
area in the river channel and will increase the average depth of the
water. Clearing will be accomplished to reduce the expected
frequency with which floods will overflow onto flood-plain areas.
Work details have been planned to accomplish significant water salvage.
18 The alinement of the inproved channel has been selected to provide a minimum interference with existing rights and interests in the
river.
Many important features for the preservation and enhancement of fish
and wildlife values are to be included in the project. The principle
features will be improvements of fish and wildlife and recreation
values in the Mittry Lake and the Yuma Island areas. At both sites,
dredging will be accomplished to deepen the existing open water,
including about 200 acres in Mary Lake and 72 acres in the
Yuma Island area. Provisions are also included in the plans for
boating, picnicking, and sanitary facilities.
Water salvage of 22,000 acre-feet per year will result principally
from lowering the water level in the river channel. This will
lower the adjacent water table reducing use of ground water by
phreatophytes. The lowered water level also makes it practicable
to clear existing phreatophytes from low areas in the channel.
On August 15, 1969, Acting Secretary of the Interior Dole approved the
May 1969 comprehensive plan report for the Yuma Division. Work will now
be initiated on the full program as promptly as funds are made available.
19 Limitrophe Division
The river in the Limitrophe Division is no longer important as a channel for conveyance of irrigation water; however, inadequacies have developed with respect to the capacity of the channel for floodflows.
These will require future action, but planning work has not been undertaken because of the higher priority of the work in upstream reaches of the river.
Any work undertaken in this Division will reflect the fact that the river is the International Boundary. Any work activity, planning, or construction must be coordinated with Mexico through the International
Boundary and Water Commission.
20
KEY TO SYMBOLS FOR LOWER COLORADO RIVER FACILITY MAPS
USBR FEATURES
X X XX X X X X Indicates "Rock Riprap" On All Symbols Indicates "Fill" On All Symbols (Except Drain)
EXISTING PROPOSED =NE 8.0==. =caw .0=1...=2.• Dredge Channel 1===001 010:=1011 11311=1101 w•==.0 , 1 1 Dredge Channel With 9t-r=9r..91==r-iffri-f=r 9° 91=91° mf=t° 91=1° "IF=1" Riprap(Except Yuma Div.) - - Dredge Channel With A A A A X X A A A 1r 1r -L -L --L -L Riprop ( Yuma Div.) Fill Type Struture A A A A A A A -r -r A A -r -r Dressed Bank (improve- ment of existing bank by 4 riprap) Jetty, Groin, Hard Point, 0,,A011111 4 P. Armored Sand Spit or Bor IL Windrow xxxxxxxxxxxxxxxxxxxxxxxxxxxxx XXX XXXXX XXXXX XXXXX XXXXX Levee or Dike 4 4 0 41.■ i r.+I■ -4-- Levee or Dike With Riprap 4 4..1..0 14-4- mirt Drain solow, .41=1. NOB
BACKGROUND FEATURES
Section Lines T R Lines Wildlife Boundary Indian Res. Boundary Townsite Outline River Bank Line (Natural) -.••••■ Levee-Other Agency 9 4 4 4 4 Canals Drains -0 Railroads 1 I 1 I 4, 4 3 1 41 1 4 1 k t Paved Road Gravel Road Intermittent Drain River Miles Below Lees Ferry Tick Mark Represents I Mile Intermediate Points
21 PLATE 3
A R I Z 0 N A
MOHAVE
10-1-69 300 W. J.H. UPDATED UNITED STATES RN AR DI N 0 C O. DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION
zopo , 2000 , 4000 6000 COLORADO RIVER FRONT WORK a LEVEE SYSTEM SCALE OF FEET TOPOCK GORGE DIVISION FACILITY MAP • DRAWNJUC SUBMITTED_ ------TRACEDi2lE._ ------RECOMMENDED ------CHECKEDARR -APPROVED ------BOULDER CITY, NE FEBRUARY 9, 1968 I 423-306-1187 LATE 4
1,0
ON ••■ CASTLEROCK ",,BAY
HAVASU
CLEARBAY NATIONAL STATE PARK WILDLIFE CATFISH BAY REFUGE
------
LAKE HAVASU MARINA
„.- LIMIT OF ACQUIRED "— LAND-LAKE HAVASU
SITE SIX HAVASU LANDING INC. RESORT
woo. 2000 4000 6000 9 SCALE OF FEET. UNITED STATES DEPARTMENT OF THE INTERIOR 4) BUREAU OF RECLAMATION Np, LOWER COLORADO RIVER FRONT WORK a LEVEE SYSTEM C AL/FOR A HAVASU DIVISION FACILITY MAP
SAN B rRNARDINO C 0.
TRACED ------RECOMMENDED ------
CHECKE 0,0 ------APPROVED ------
BOULDER CITY, SISIHEEV T I OF 4APRIL 21, 1969 423-300-804 PLATE 4 Cont
\ 0 BLACK MEADO I NC.
HAVASU WHIPPLE PALMS BAY
LIMIT .OF ACQUIRED LAND-LAKE HAVASU
GENE PUMPING STATION
\-1 GENE
UN I TED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION LOWER COLORADO RIVER FRONT WORK IN LEVEE SYSTEM C A L F O R HAVASU DIVISION S A N B E R A R D I FACILITY MAP
2000 2090 4000 6000 9 DRAWNFj SUBMIT TED ------SCALE OF FEET TRACED ------RECOMMENDED ------
CHECKED-4P APPROVED ------
BOULDER CITY, NEV. APRIL 21,1969 SHEET 2 OF 4 423-300-805 PLATE 4 Cont.
AKE MOOVALYA KE S
HEADGATE ROCK DAM
BUCKSKIN MOUNTAIN 4 COLORADO RIVER STA E PARK \
HA SU SPR
PARKER DAM UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION LOWER COLORADO RIVER FRONT WORK a LEVEE SYSTEM HAVASU DIVISION SHEET
MATCH FACILITY MAP
• 2000 0 2000 . 40.00 6000 1 - DRAWN /4 -SUBMITTED ------SCALE OF FEET TRACED ------RECOMMENDED-
CHECKED.* ------APPROVED
BOULDER CITYS,Hzg 3 OF A4PR1L 21,1969 J 423-300-806 PLATE 4 Cont.
N.
12 7
HAVASU A RI S RINGS Z O N A M O H A V E C O.
17
4 NATIONAL
21
9
16
33 33 34 32
TIIN RI8W TIIN RI7W TION RI8 W T ION R17 W A RIZON A Y U M A C O. UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION
LOWER COLORADO RIVER FRONT WORK 13 LEVEE SYSTEM 2000 9 2000 4000 6000 HAVASU DIVISION SCALE OF FEET FACILITY MAP
DRAWN_#) ------SUBMIT TED ------
TRACED ------_ RECOMMENDED ------
CNECKEO..d21L ------APPROVED ------
BOULDER CITY, NEV. MAY 7 1969 SHEET 4 OF 4 ' I 423-306-808 PLATE 7
cn
ID TAYLOR FERRY 2 ID csi as ID
ID 11111111 1P 0 01
01 A ADOBE RUIN • CIBOLA Y UMA LAKE
WALKER LAKE
01
ID
II TRRELEAKFEINGER
-ROAD ACCESS PROPOSED LEVEE'9 I CLOSURE PROPOSED
01
0.1
CIBOLA v. OPERATING BRIDGE
INLET BOAT LUNCHING RAMP STRUCTURE
DAVIS LAKE
10-1-69 300 WJH. UPDATED - - 2 9 69 GENERAL REVISIONS 0rn 306 W.J.H. UNITED STATES DEPART ME NT OF THE INTERIOR BUREAU OF RECLAMATION COUNTY LOWER COLORADO RIVER FRONT WORK a LEVEE SYSTEM CIBOLA DIVISION
0 FACILITY MAP
2 SUBMITTED 2 20100 4000 6000 DRAWN_ _ ID 44111!?1 „1? 2. ------SCALE OF FEET ' TRACED RECONIMENDED_ 4 CHECKED4 _ APPROVED ------
BOULDER CITY, NEV. FEB.10,I17 I 423 -306-1191 PLATE 8
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I MPERIAL COUNTY 7-29-69 REDREW COLORADO RIVER 300 W.J.H 2— 8— 68 ADDED RIVER MILES 306 W.J.H. UN I TE D STATES DEPARTMENT OF THE I NTERIOR BUREAU OF RECLAMATION
2000 20,00 4C006 000 COLORADO RIVER FRONT WORK ' Ei LEVEE SYSTEM SCALE OF FEET IMPERIAL DIVISION FACILITY MAP
DRAWN W.I.B D.P.R SUBMITTED TRACED A.I.5 - - - - RECOMMENDED CO s.* CHECKED 4, APPROVED_ BOULDER CITY, NEV SO SHEET I OF 2' ' 1423-306- II 92 PLATE 8 Cont
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IMPERIAL DAM CALIFORNIA IMPERIAL. COUNTY
8-21-69 300 W.J.H. REDREW COLORADO RIVER 2— 8 —68 306 W.J.H. ADDED RIVER MILES UNITED STATES DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION COLORADO RIVER FRONT WORK &LEVEE SYSTEM IMPERIAL DIVISION
2000 _ 2000 4000 SOP() FACILITY MAP I • SCALE OF FEET ,1 DRAWN W. 8 - SUBMITTED ------TRACED W.J.e - - - - RECOMMENDED_ CHECKEDSAR, __ _APPROVED ------BOULDER CITY,NEV 6-30-66 I SHEET OF 1423-306-1193 PLATE 9
YUMA TEST STATION
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10-17-69 300 W.J.H. REDREW IMPERIAL RESERVOIR 2-8-68 ROADS ADDED RIVER MILES 2000 0 2000 4000 6100 306 W.JH REVISIED a UNITED STATES SCALE OF FEET DEPARTMENT OF THE INTERIOR BUREAU OF RECLAMATION LOWER COLORADO RIVER FRONT WORK El LEVEE SYSTEM LAGUNA DIVISION FACILITY MAP
DRAWN j.L.R SUBMITTED ------TRACED ------RECOMMENDED CHECKED ------APPROVED ------
CITY, NEV. BOULDER N°V. 17. le" 1 4 23 — 306-119 4 PLATE I I
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2-7 -68 ADDED RIVER MILES 306 W.J.H. UNITED STATES DEPARTMENT OF THE I NTERIOR BUREAU OF RECLAMATION , 2000 4000 6100 COLORADO RIVER FRONT WORKa LEVEE SYSTEM S'CALE M FEET LIMITROPHE DIVISION FACILITY MAP
DRAWN DPR SUBMITTED - TRACED ------RECOMMENDED CHECKED_BLC_ ------APPROVED ------
BOULDER CITY, NEVADA 10/3/66 1 423-306- 1196 MORMON FLAT DAM
ROCKS
FLOATING LOG CAVE BARRIER
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ACACIA PICNIC AREA TYPES OF RECREATION Fishing PALO VERDE Victor Skiing REC. AREA Boating Picnicking Camping
GAME FISH IN LAKE / 1 BOULDE I Liam PION I PICNIC WALLEYE ARE 4 AREA Is ,
LARGEMOUTH BLACK BASS
RAINBOW TROUT
TORTILLA TO APACHE LAKE EMOOP CAMP GROUND SWUM
0 CHANNEL
04. CATFISH TORTILLA FLAT I GAS 2.MOTEL 3. POST OFFICE 4. COFFEE SHOP 5. PICNIC SUPPLIES SKULL CAVE
HORSE MESA DAM
ANYON LAKE CREATION AREA
Formed by STATISTICS MORMON FLAT DAM THE DAM Location...... SI miles from Phoenix Construction Dates ...... 1923-1925 Cost of Dom ...... $2,497,000. Pump Turbine Generator.... $12,205,000. Size ...... 380ft long - 224 ft. high Generating Capacity...... 57,000K.W THE LAKE Length ...... 10 miles Shoreline ...... 28.3 miles Capacity ...... 57,852 acre feet* Surface Acreage when full ...... 950 ac. Maximum Depth ...... 141 feet Normal Elevation ....1660.5 ft. sea level An acre foot is equal to one - acre covered one foot deep. reproduced and distributed by
SALT RIVER PROJECT P.O. Box 1980 Phoenix, Arizona 85001
MNYON LAKE IS ONE OF SIX LAKES ON THE SALT RIVER SCALE WM/ IRRIGATION AND POWER TRANSMISSION SYSTEM.FOR MIER INFORMATION WERE THE COMMUNITY RELATIONS 0 1 mi. EPARTMENT OF THE PROJECT AT THE ABOVE ADDRESS