Record Details
page 3-24
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 3-24 Final environmental impact statement on the Provo River Restoration Project, page 3-24 |
| Coverage | Electronic reproduction; |
| Format | 3-24 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; impacts on sediment and associated TP inputs will be minimized during this period by the construction SOPs see section 196.1 1961 iggi of chapter 1 this is not considered significant since it would not increase annual reservoir TP concentrations fencing of land to be acquired under the proposed action would cause a minor decrease in TP loads to the reservoir of about 465 kgyear 1024 pounds this would not change TP concentrations in deer creek reservoir since it is less than 3 percent of the average annual baseline load to the reservoir 33632.3 336323 336323 reservoir temperature and mixing status the proposed action would not change the hydrology of deer creek reservoir because it would not change inflow and outflow characteristics of the reservoir from baseline conditions therefore changes in reservoir depth or storage under the proposed action would not affect stratification and mixing in the reservoir the proposed action could temporarily increase inflow temperatures from the provo river under late summer dry year conditions however the temperature increase in reach 2 closest to deer creek reservoir of of56f 56f would be less than the significance criteria of an 18f change from baseline conditions therefore changes in inflow temperature of the provo river under the proposed action would not affect stratification or mixing in deer creek reservoir 3363.3 33633 33633 impact summary the following water quality impacts would occur under the proposed action the proposed action would cause a minor increase in TSS and TP concentrations in the provo river during and immediately after construction however the SOPs would prevent significant impacts TSS and TP concentrations in the river would decrease slightly after construction and fencing of acquired land is completed this would have a positive impact e 0 until new vegetation is established the loss of riparian vegetation and associated shading and the addition of more river surface area could increase late summer stream temperatures from 120f 12f in reach 5 to 62f in reach 8 water temperatures would decrease to or slightly below baseline levels after vegetation 3 matures the significance of these changes is evaluated in section 3.5 35 35 aquatic resources A minor increase in annual TSS loads to deer creek reservoir would occur during and immediately following construction however the SOPs are expected to prevent significant impacts TSS loads to the reservoir would decrease slightly after construction and fencing of acquired land is completed this would have a positive impact A minor increase in annual TP loads to deer creek reservoir would occur during and immediately after construction however SOPs are expected to prevent significant impacts TP TT loads to the reservoir would drop by about 465 kgyr 1024 pounds after construction and fencing of acquired land is completed this reduction would not change the average annual TP TT concentration in the reservoir significantly the proposed action would not change the mixing status or stratification of deer creek reservoir 336.4 3364 3364 existing channel modification alternative the following sections define potential water quality impacts from construction of the existing channel modification alternative by impact topic 3364.1 33641 33641 provo river the following subsections describe potential water quality qualm impacts on deer creek reservoir under the existing channel modification alternative 336411 3364.11 336411 336471 nutrients and sediments construction of this alternative would cause soil erosion leading to increases in TSS and TP TT concentrations in the provo river however the soil resources analysis section 3.8 38 38 of the PRRP EIS concludes that construction of this alternative would only cause negligible amounts of soil to enter the provo river this alternative would acquire only 7.6 76 76 acres of agricultural land above that acquired under baseline conditions this land would be fenced and exclude livestock but there would be a negligible increase in TP and TSS loads in the provo river and no change in concentrations therefore the existing channel modification alternative would cause a minor 24 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/6921 |
