796 

 4. Coastal Zone Management 



16 U.S.C. 1451-1464 



(See Coastal Zone Management under title VIII Oceanography) 



5. Colorado River Basin Salinity Control 

 43 U.S.C. 1571-1599 



SUBCHAPTER I.— PROGRAMS DOWNSTREAM PROM 



IMPERIAL DAM 

 Sec. 



1571. Water quality Improvement. 



(a) Authority to proceed with program. 



(b) Desalting complexes and plants. 



(c) Replacement water studies. 



(d) Advancement of funds for that portion of 



bjrpass drain within Mexico. 



(e) Desalted water exchange. 



(f ) Return flow reduction. 



(g) Disposal of acquired lands. 



(h) Assistance to water users for Installation of 



system Improvements. 

 (1) Contract amendment. 

 (J) Acquisition of land for storage, 

 (k) Transfer of funds. 

 (I) Nonreimbursable costs. 



1572. Canal or canal lining. 



(a) Authorization of construction. 



(b) Repayment. 



(c) Acquisition of private lands. 



(d) Credit to Imperial Irrigation District against 



final payments for relinquished capacity 

 in Coachella Canal. 



(e) Transfer of lands to Cocopah Tribe of Indians. 



1573. Construction and maintenance of well fields; land 



acquisition; land replacement; nonreimbursable 

 costs. 



1574. Modification of projects. 



1575. Contract authority. 



1576. Interagency cooperation. 



1577. Existing Federal laws not modified. 



1578. Authorization of appropriations. 



SUBCHAPTER II.— MEASURES UPSTREAM FROM 

 IMPERIAL DAM 



1591. Implementation of salinity control policy. 

 1692. Authorization to construct, operate, and maintain 

 salinity control units. 



1593. Planning reports; research and demonstration 



projects. 



1594. Colorado River Basin Salinity Control Advisory 



Council. 



1595. Allocation, payment, and repayment of costs; ad- 



justment of electrical energy rates. 



1596. Biennial report to President, Congress, and Advisory 



Council. 



1597. Construction of provisions of subchapter. 



1598. Modification of projects; contract authority; au- 



thorization of appropriations. 



1599. Definitions. 



SUBCHAPTER I.— PROGRAMS DOWNSTREAM 

 FROM IMPERIAL DAM 



§ 1571. Water quality improvement, 

 (a) Authority to proceed with program. 



The Secretary of the Interior, hereinafter referred 

 to as the "Secretary", is authorized and directed to 

 proceed with a program of works of improvement for 

 the enhancement and protection of the quality of 



water available in the Colorado River for use in the 

 United States and the Republic of Mexico, and to 

 enable the United States to comply with its obliga- 

 tions under the agreement with Mexico of August 30, 

 1973 (Minute No. 242 of the International Boundary 

 and Water Commission, United States and Mexico) , 

 concluded pursuant to the Treaty of February 3, 1944 

 (TS 994) , In accordance with the provisions of this 

 chapter. 



(b) Desalting complexes and plants. 



(1) The Secretary is authorized to construct, op- 

 erate, and maintain a desalting complex, including 

 (1) a desalting plant to reduce the salinity of drain 

 water from the Wellton-Mohawk division of the Gila 

 project, Arizona (hereinafter referred to as the divi- 

 sion) , including a pretreatment plant for settling, 

 softening, and filtration of the drain water to be de- 

 salted; (2) the necessary appurtenant works includ- 

 ing the intake pumping plant system, product water- 

 line, power transmission facilities, and permanent 

 operating facilities; (3) the necessary extension in 

 the United States and Mexico of the existing bypass 

 drain to carry the reject stream from the desalting 

 plant and other drainage waters to the Santa Clara 

 Slough in Mexico, with the part in Mexico, subject 

 to arrangements made pursuant to subsectiO!i (d) 

 of this section; (4) replacement of the metal flume 

 in the existing main outlet drain extension with a 

 concrete siphon; (5) reduction of the quantity of ir- 

 rigation return flows through acquisition of lands to 

 reduce the size of the division, and irrigation e£B- 

 ciency improvements to m.inimize return flows; (6) 

 acquire on behalf of the United States such lands 

 or interest in lands in the Painted Rock Reservoir 

 as may be necessary to operate the project in accord- 

 ance with the obligations of Minute No. 242, and (7) 

 all associated facilities including roads, railroad 

 spur, and transmission lines. 



(2) The de.sal'^ing plant shall be designed to treat 

 approximately one hundred and twenty-nine million 

 gallons a day of drain water using advanced tech- 

 nology commercially available. The plant shall effect 

 recovery initially of not less than 70 per centum of 

 the drain v/ater as product water, and shall effect 

 reduction of not less than 90 per centum of the dis- 

 solved solids in the feed water. The Secretary shall 

 use sources of electric power supply for the desalting 

 complex that will not diminish the supply of power 

 to preference customers from Federal power systems 

 operated by the Secretary. All costs associated with 

 the desalting plant shall be nonreimbursable. 



