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<br />.,~ <br />"....'. .,;~ <br />,,"~ , <br /> <br />,l~) <br /> <br />.-l <br />.-l <br />~ <br />C": <br /> <br />l5. Gaging Station, Colorado River at Northern International <br />Boundary <br /> <br />c <br /> <br />This station is located slightly upstream from Morelos Dam and is <br />operated and maintained by IBWC. It is the principal measuring point <br />for delivery of Mexico's treaty water in the Colorado River. <br />Reclamation operates and maintains a Te1emark system that is paged by <br />radio equipment at the Imperial Dam Control House. Hourly flows at <br />this station are recorded. This information has been very helpful in <br />regulating the required delivery of water to Mexico. During periods <br />of high discharges below More1os Dam, this gage is affected by <br />backwater and at those times is not as accurate as during more normal <br />flow conditions. The radio equipment functioned very well during <br />1981. <br /> <br />VII. <br /> <br />SUMMARY OF COSTS TO THE GOVERNMENT, IMPERIAL DAM PROJECT <br /> <br />Under the terms of the March 1952 Amendatory Contract with the Imperial <br />Irrigation District, O&M of the All-American Canal Headworks and Trashrack <br />and the Desilting Basins at Imperial Dam, along with the remaining portion <br />of the All-American Canal, was transferred to the District on May I, 1952. <br />Reserved works that continued to be operated by Reclamation, include Laguna <br />Dam, the Gila diversion works, the California and Gila sluiceway gates, and <br />the overflow weir section of Imperial Dam. <br /> <br />The actual O&M of the reserved works is financed with funds advanced by the <br />water users who share in the water diverted at Imperial Dam. In addition, <br />Reclamation is required under the terms of the Mexican Water Treaty, the <br />All-American Canal Amendatory Contract, and Secretarial Order No. 2685 to <br />continue river investigations and analyses in the field of hydrography and <br />aedimentation, prepare master schedules for operations at Imperial and <br />Laguna Dams, and supervise all phases of activity in connection with these <br />operations. The following table shows a summation of the funds expended <br />during calendar year 1981. <br /> <br />17 <br />