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CON! TRu[ liON During Fiscal Year 1973 construction accomplishments Included starts on both the Weld Substation, Weld County, Colorado, and Tunnel No. 4 on the Main Canal 01 the Navajo Indian Irriga- lton Project. Siphons were replaced on Fruitland Mesa Project and on the Bost. wick Park Project. Two portions of the Archer Substation were also com- pleted Soldier Creek Dam (Bonneville Unit, Central Utah Project) and Tunnels No.3 and 3A on the Main Canal ollhe Navajo Indian Imgation Project were substantially complete at the end of the liseal year. A diversion tunnel was drilled al Crystal Dam. Curecanti Unit, and work began on the dam and powerplant structures. A contract was awarded for construc- tion 01 a thin-arch concrete dam and powerplant at a cost of about $20,- 800,000-a savings of about $3,400,000 over the estimated cost of an earthfill dam at the same sIte. Other work this year on the umt included construction of an exhibit shelter and parking area lor visitors at Morrow Point Dam and a prelabricated metal warehouse at Mont~ rose. Colorado. Work also began on bituminous surlacing 01 roads and parking areas at Morrow Point Dam. Blue Mesa Dam, and at the Power Op- 6 eralions Center at Montrose. The Cure- cant i-Crystal 115-kilovolt Transmission Line extension is underway. At the Glen Canyon Unit, upgrading 01 viSItor lacilities continued. An addition to the Page water filtration plant was completed, as was an airport fire sta- tion. Major new starts on the Bonneville Unit of the Central Utah Project were delay- ed pending the processing 01 an envi- ronmental statement. Work already underway was continued. U.S. Highway 40 was relocated around the enlarged Strawberry Reservoir. Soldier Creek Dam was essentially complete with only cleanup and some minor work remain- ing. The first lifteen miles of the Jordan Aqueduct were substantially complete at the end of the fiscal year. Both the Layout and Currant Tunnels were holed through and lined with concrete. Water Hollow Diversion Dam and the Layout Creek stream inlet structure were com- pleted. A U.S. Forest Service trail into the Uinta Mountain Primitive Area was relocated around the proposed Upper Stillwater Reservoir. In June the State ot Ulah let a contract lor construction 01 tour miles 01 Inter- state Highway '-15 north of Nephi, Utah. The contract provides for the construc- tion of two seven-loot diameter pipe siphons to extend the proposed Mona- Nephi Canal under the highway. An estimated $150.000 will be saved by building these siphons now rather than when the canal is constructed, Construction olthe drainage system for the Emery County Project began with the award of a contract lor live and a half mites 01 closed drains. A corrugated metal siphon in the exist- ing Vernal DItch was replaced in the Bostwick Park Project area Two welded steel pipe siphons in the existing Gould Canal In the Fruitland Mesa Project area were replaced Improvements on the Main Canal of the Hammond Project continued A contract for the Antler Valley Drain of the Sill Project was awarded and com- pleted Improvements on several features 01 the Eden Project were accomplished. Construction was completed on a lorty- three-mile segment and begun on an- other twelve-mile segment 01 the 230- kv transmissl~n line Irom Archer Sub- station in Wyoming to Weld Substation in Colorado. Stages 02 and 03 con- struction on the Archer Substation was completed and Stage 01 construction on the Weld Substation begun. On the Navajo Indian Irrigation Project in New Mexico, work continued on about thirteen mites of Main Canal. Tunnels 3 and 3A were substantially complete. The existing highway around Fonte- nelle Reservoir, Seedskadee Project, was rehabilitated