OCR Text |
Show leaving the bay is caused by the extremely high evaporation rates within the bay. In summary, the overall water quality should be improved under Unit conditions. Even if Provo Bay were separated from the Lake by a dike, no agricultural ( nor any other type) development could take place without a well designed drainage system. With an agricultural development the drains would keep the water table at such a depth that crop growth would not be retarded. With an industrial development a drainage system would still be required to keep the water table below the foundations of buildings and to permit landscaping. Spanish " Fork Area The major portion of the drainage deficient Unit lands in the Spanish Fork Area are located adjacent to Beer Creek, due south of Utah Lake. These lands are currently plagued with a high groundwater table and could be reclaimed only by subsurface drainage. Included in this problem area would be approximately 1,600 acres of non- irrigated land which also have salinity problems of varying degrees. Due to favorable subsurface permeability, total reclamation can be accomplished on these lands by irrigation and drainage. Return flow waters from several miles of existing drains in the Spanish Fork Area, discharge into Beer Creek and would be mixed with other return flow water and rediverted for irrigation use on lands along Beer Creek with no adverse effects. Under Unit operation most of the new drainage waters from the Spanish Fork Area would enter Utah Lake as tributary inflows. Based on quality analysis of discharge from the existing drains, the quality of new drainage waters is estimated to range from 800 to 1500 p. p. m. Mona- Nephi Area The lower lying lands of the Mona- Nephi Area either have high water tables or would be 273 |