Record Details
page 4-149
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 4-149 Final environmental impact statement on the Provo River Restoration Project, page 4-149 |
| Coverage | Electronic reproduction; |
| Format | 4-149 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; the proposed main channel in the proposed action is integrated with the existing channel alignment and grade to the extent possible throughout the project the significant increase in sinuosity and meander corridor width makes it impossible to follow the existing channel for very long without violating the PRRP design parameters which were selected based on comparison with high hiah quality natural 1 river systems amy any reduction in channel length for the proposed action alignment would result in a commensurate reduction in project benefits table 117 1 17 in the final EIS indicates that the construction cost for the existing channel modification alternative which uses the old channel exclusively is very similar to that for the proposed action due to the extensive channel geometry modifications and bedbank bed bank stability treatments required to create desirable habitat conditions along the present alignment the draft EIS and the PRRP technical report recognize the fact that the current project description is based on a feasibility level design not final design this included considerable field reconnaissance analysis of topographic maps and historical information and comparison with similar natural stream systems this level of analysis was adequate to define project alternatives and estimate comparative costs benefits and impacts so that a recommended alternative could be selected it is anticipated that aspects of the selected PRRP alternative will be modified during final design based on comprehensive field investigations and more detailed topographic mapping also please refer to comment responses 20.4 204 204 20.5 205 205 and 20.17 2017 reach I 1 1 the proposed action includes removing the levees on both sides of the channel downstream of the railroad trestle this will allow high flows the opportunity to access the floodplain flood plain and allow the channel to integrate naturally with the deer creek reservoir backwater area placement of instream in stream structures in this reach will not be considered because natural channel adjustments are anticipated after removal of the levees also please refer to comment response 20.24 2024 reach 2 the proposed modification for this reach do not vary significantly from the proposed action during final design project designers could consider most of the recommended modifications suggested here also please refer to comment responses 20.4 204 204 and 20.5 205 reach 3 the proposed modifications for this reach do not vary significantly from the proposed action during final design project designers could consider most of the recommended modifications suggested here under the proposed action the existing levee is retained along the east bank of the lower portion of reach 3 to continue to provide the current level of flood protection to developed private parcels in the floodplain flood plain this inflow is probably a combination of spring flows and return flows there is no major tributary at this location the normal bank stabilization treatment should be adequate in these sections minor meander migration can be tolerated between stations 3500 and 6500 the proposed action includes creating more structural diversity in the channel cross section in the straight section downstream of midway road similar to the modifications described for the existing channel modification alternative please refer to the draft EIS section 171.2 1712 1712 paragraph 2 4149 4 149 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/8051 |
