Record Details
page 140
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 140 Central Utah Project, Bonneville Unit : Diamond Fork Power System : final Environmental Impact Statement, page 140 |
| Coverage | Electronic reproduction; |
| Format | 140 text/PDF |
| Rights | Brigham Young University; http://lib.byu.edu/about/copyright/generic.php Public Domain Public |
| Language | English; eng; en |
| Relation | Central Utah Project; Western Waters Digital Library; CHAPTER IV AFFECTED environment AND environmental consequences in both the fifth water and sixth water pumpback humpback pump back alt ait alternat altermat alternatives ernat ives the hydraulic mixing is expected to minimize temperature stabilization in the proposed peaking reservoirs surface warming however would occur similar to the recommended plan these waters would re aerate the low dissolved oxygen inflow from strawberry but some local deficiencies may infrequently exist from the strawberry inflows if the fifth water pumped storage powerplant Power plant were constructed un known quantities of warm ground water up to 35 C could be intercepted this water may contain relatively high levels 5001000 500 1000 egl mgl of total dissolved solids and possibly hydrogen sulfide and may cause temporary warming of the stream and an increase in TDS and hydrogen sulfide A national pollution discharge elimination system section 402 permit would be obtained to cover each discharge of ground water and state and federal standards would be met as far as practical methods developed to project water quality conditions such as tem peratures pera tures and trophic state do not adequately address many character istics ristics of a large pumped storage system examples of significant unaddressed aspects include momentum of large flows morphormetric features and other physical restrictions each of these factors would tend to reduce the growth of aquatic vegetation nutrient loading into fifth water and monks hollow reservoirs from strawberry reservoir would be relatively high especially during years that waters are released from below the thermocline both reservoirs would be classified as eutrophic the probability of eutrophy would average about 60 percent but could range between 40 and 90 percent in both fifth water and monks hollow reservoirs algae growth and limiting factors for the reservoirs would be similar to the recommended plan under project operation turbidity and suspended solids levels would be significantly reduced in diamond fork from present conditions particularly below monks hollow reservoir about 91 percent of the sediment inflow would be retained in that reservoir table 29 the total sediment load at the mouth of diamond fork would be reduced about 62 percent from present conditions table 30 sixth water pumped storage alternative syar reservoir would be about 5 times as large as under the recommended plan detention time would be correspondingly longer about 2 to 7 days sixth water reser voir would be slightly larger with a detention time of about a day water in both reservoirs would be completely mixed and would have eutrophic nutrient loadings probability of eutrophy of 66 to 97 percent for syar and 74 to 98 percent for sixth water water in both syar and sixth water reservoirs and that released to monks hollow reservoir would be almost the same quality temperatures dissolved oxygen and nutrient levels as that released from strawberry reservoir however some aeration would occur algae growth probably would not be excessive in either reservoir because of high flushing rates and colder water temper agures atures at times 140 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/4076 |
