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.... 0') w 00 from the proposed Towaoc-High- line Canal (a Dolores Projecf tea. ture) 10 serve the Rocky Ford OUch service area The Rocky Ford Dilch would then be aban. doned as part 01 the plan. and its flows would be combined into the proposed Towaoc-Highline CanaL These portions of fhe McElmo Creek Unit have been authorized for construction as part ollhe Dolores ProJecl. The McErmo Creek USDA salinity control report was publiShed in 1983 The recom- mended implementation plans call lor treatmenl or about 19.700 acres with sprinkler irrigation sys- lems and about 270 miles of on. farm ditch and laferal lining By combining the USSR anti USDA projects In this area. the more eNlclem gravity pressure sprinkler systems can be in. sfalled 10 an acldillonal 9.000 acres over the original USDA 1m. p1ementation plan: The USDA im. plementation schedule will provide for coordinaled onfarm and off. farm planning Meeker Dome Meeker Dome is a local an- liclillal uplift ili northwestern Colorado and is Ihe site of several abandoned oil And gAS exploralory wells During verifica. lion studies. (he abandoned SCOll. James. and Marland oil wells were cleaned And plugged AI the end of FY 1985, monitor- ing of seeps and wells was ter. minaled Waler levels in the ob- servalion wells had stabiliZed and springs and seeps remained dry or Iilled with standing water in- dicating the well plugs remained intacl The estimaled cosl E"ffE"c- tiveness 01 this 19,000 tons reduc- tion is about $t4 per Ion A plan. ning report concluding lhe Sludy was published in July 1985 Moapa Valley (USDA) The project coverS a 5.000. acre irrigated area on Muddy River upslream of Lake Mead The project includes installation 01 17 miles 01 underground piped delivery system. onfarm waler managemenl. and salinity conlrol practices By reducing overirriga- tion and excessive deep percola. tlon. the average annual salt load is expecled to be reduced by 19.200 Ions This unit has met the prerequisite for construction and Is awaiting funding SCS publiShed its report on Moapa Valley In February 1981 Palo Verde Irrigation District (USSR and USDA) The Palo Verde Irrigalion Dis. Irict is a privalely developed dis. triCI in Riverside and Imperial Counties. California Water for ir. rigatlon is diverted from Ihe Colorado River at the Palo Verde Diversion Dam and is conveyed through 295 miles 01 main canals and lalerals to serve approximate- ly 91.400 acres 01 irrigated land within the dislrict The irrigation return flows are collected in a 153-mile drainage system and returned 10 the Colorado River; however. the reI urn flows are 10' cated below many of Ihe areas impacted by salinity and would not have Ihe full benefits of an upslream project An analysis based on 1974 operational data indicated Ihat 152.000 tons of salt was lhe net discharge to the river The PalO Verde subarea alone discharged 144,000 Ions annually In 1985. $CS and Reclamafion lormulated a joint pfan 01 Sludy SCS will provide Reclamation with onfarm, onsile evaluations and analyses relative 10 irrigation efficiencies. deep percolation. and prospects for imprOved on. farm managemenl The USDA portion 01 the evaluation has not yet been IUnded pending the out. come of Reclamation's Phase I work. Reclamation completed the shallow well drilling for the verification program in May 1985 and Is sampling Ihe test wells. During 1987. Reclamation ac- tivities will complete Phase I work in developing hydrosalinily analysis for the PVID 10 deter- mine lhe moVemenls of ground water and source 01 salt load- ings The study will provide infor- mation for Reclamation. USDA. and the PVID to determine salinity control program com- ponents and the need lor lurther sludles Paradox Valley (USSR) Paradox Valley. a collapsed salt anticline. is a northwest- southeast trending valley 3 10 5 miles wide in soufhwesfern Colorado Ground water comes into contact with Ihe top ollhe salt lormation where it becomes nearly saturated with sodium chloride and surfaces in Ihe Dolores River channel in Paradox Valley Studies condUCled by lhe Bureau of Reclamation have indi- cated lhal lhe river picks up o\ler 205.000 Ions of salt annually as il passes fhrough the valley The ongoing lesting program consists 01 verificalion Clnd refine- ment of controlling brine inflow to Ihe river. design data collec- lion lor future facilities. and drill- ing and testing an injection well Reclamation is using outside con. sultants for ils fechnical assis- tance on deep well injection A .