Record Details
page 4
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 4 Final environmental statement : authorized Upalco Unit, Central Utah Project, Utah, page 4 |
| Coverage | Electronic reproduction; |
| Format | 4 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; attachment 6 by low densities of species adapted to living in a reservoir environment the community structures of 0 benthos would be altered to lower spec species ies les diversity composition and biomass however the function of the benthic communities would remain the same providing food for higher organisms and acting as decomposers de composers passing nutrients through the system although this function would take place at a lower rate D other effects 40 CFR 230.4 2304 aa ka 1a 1 changes in bottom geometry and substrate composition after inundation the rocky substrate of the riverbed riverbee river bed within within taskeech Tas keech reservoir would fill in and become a silt and mud bottom general geometrytopography geometry topography would be unchanged see also c6 ca of EIS 2 water circulation not significant see c5 ca and c6 ca of EIS 3 salinity gradients not applicable 4 exchange of constituents between sediments and overlying water with alterations of biological communities not significant for the following reasons a fill material is non polluted and non toxic b taskeech Tas keech reservoir is projected to be an oligotrophic system as determined by the vollenweider model EPA redbook redhook red book tables 1 and 2 give the average monthly flows phosphorous concentrations modeling calculations and results III 111 ili chemical biological interactive effects 40 CFR 2304 ab kb 1b A does the material meet the exclusion criteria if so state the rationale the materials to be used for construction of the earthfall earthfill earth fill taskeech Tas keech dam on lake fork river and the canal diverisons diveris ons outlet structures twin pots dam modification and stabilization of the high country lakes meet the exclusion criteria as outlined in the 404 guidelines 40 CFR 2304 230.4 ibl ibi the material to be used for fill except for the core of the earthfall earthfill earth fill dam which would not be in direct contact with surface waters would be inert material consisting of concrete sand gravel and rock riprap obtained from sources in the immediate area the fill material would be a glacial fill of uinta mountain quartzite origin that is very low in soluble materials and sufficiently removed from sources of contaminants in addition the full material with particle sizes larger than silt is substantially the same as the substrate at the proposed disposed sites and would not be moved by currents away from their sites of deposits 4 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/3220 |
