Record Details
page 1-32
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 1-32 Final environmental impact statement on the Provo River Restoration Project, page 1-32 |
| Coverage | Electronic reproduction; |
| Format | 1-32 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; map al A l 1 in the pocket at the back of the EIS shows approximate locations of existing and new points of diversion the need for the valeo diversion would be eliminated by designing the river to deliver adequate flow to the wasatch canal diversion point reconstructed diversions would be located on the outside bend of a river meander to improve operations under low flow conditions diversion structures would consist of headwalls and manually operated gates similar to the existing structures but there would be no hard sills spanning the entire river bottom boulder placements as well as the natural channel structure on the outside of a meander would direct flows to the diversion structure even during low water periods most of the existing road and pipeline crossings could be preserved under the proposed action exceptions are the casper bridge and the private bridge in the upper portion of reach 9 which would be relocated to accommodate the new channel alignment all other crossings by major roads railroads and utility pipelines would remain intact abutments and piers would be protected with placement of large rock salvaged from the existing levee riprap 1 L 51.2 512 specific reach features improvements are not proposed for reach I 1 1 because it falls within the deer creek reservoir flood easement and is subject to inundation during periods of maximum reservoir storage this creates a situation in which improvements would be short lived because of sediment deposition and highly variable hydraulic conditions short sections of reaches 3 7 and 8 would have step pool channel geomorphology this channel type is defined as moderately entrenched with a moderate gradient and relatively straight platform and dominated by fiffles riffles rif fles small drops and pools channel segments designed with these characteristics are required because of a combination of manmade and natural constraints that force the channel into a straight alignment for distances of about 1000 feet only minimal intervention is proposed for reach 4 to ensure compatibility with upstream and downstream reaches this represents a change from the draft EIS the existing reach 4 system has a 1 broad floodplain flood plain unrestrained by dikes in which multiple shifting channels of the past appear to be transforming into a single thread meandering channel that meets the goals of the PRRPs proposed action past channel instability in this section has been created by deposition of sediment carried through upstream diked biked reaches proposed upstream river modifications as well as the regulated jordanelle Jor danelle reservoir releases appear to have reduced sediment deposition problems in this reach most of reach 4 river alignment would be allowed to adjust itself in response to operational and management changes the major focus of the proposed action in reach 4 is acquisition of the 100 year flood zone in fee title this area is already within the existing flood easements owned by the federal government since the 1950s although these easements would allow the federal government to complete the proposed action features within reach 4 without additional acquisition public access requirements and management objectives require acquisition of fee title the core area is designed to contain the 100 year flood zone in reach 4 the expanded restoration area encompasses the remainder of the existing flood easements in reach 4 construction of new channel is proposed only in a few short segments where needed to connect partially formed meanders or to accommodate diversions or similar needs this approach would ensure longterm long term geomorphic stability of the proposed developing channel channel design for selected features in this reach would utilize the existing active channel features as much as possible the current channel within reach 4 is expected to continue stabilizing into single meandering channel surrounded by ripa riparian rian xian vegetation four ponds would be created in reach 7 06 og 0.6 06 acre on existing federal property to provide additional suitable habitat for overwintering over wintering of spotted frogs final locations and dimensions would be determined during final design with input from the bonneville basin conservation and recovery team and its technical advisors in m reach 9 four small about 0.1 01 oi ol acre each deep water wetland habitats would be constructed to replace similar habitats that would be removed during construction an existing diversion from the river would be rebuilt to provide water directly to several USBR USER wetland mitigation areas for delivery of year round water supply |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/7215 |
