Record Details
page 3.7-16
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 3.7-16 Finding of No Significant Impact Lake Fork Section 203 Alternative : Proposed Action, page 3.7-16 |
| Coverage | Electronic reproduction; |
| Format | 3.7-16 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; numbers in and near boulder colorado in the uinta basin along the south slope of the uinta mountains and in diamond fork creek which is a tributary to utah lake in the great basin ute ladies ladles tresses orchid is the only threatened plant species that may be affected by the construction and operation of the big sand wash feeder diversion structure and pipeline and may be affected by the construction of the big sand wash roosevelt pipeline surveys conducted in 19931994 and 2000 see map 3.72 372 37 372 2 for species distribution located ute ladies tresses along the me lake fork river within the construction area for the big sand wash feeder diversion structure and certain areas of the me pipeline adjacent to the lake fork river orchids also are known to occur at the proposed wetland mitigation site disturbance of the areas adjacent to the river may eliminate some ute ladies tresses and me the disturbed areas along the lake fork river may create new habitat for the species when the exact centerlines for these pipelines are determined intensive field surveys will be conducted to determine if there is occupied habitat that would be impacted and what conservation measures would be appropriate operation of the enlarged big sand wash reservoir would affect the existing hydrology on the lake fork river these changes in streambank stream bank morphology inundation inundationdrying drying of occupied habitat or changes in hydrology can create or modify habitat three locations on the lake fork river were chosen to evaluate potential impacts of hydrology changes on the orchid C canal south boneta and han hamilton dlton diton knudsen diversions the evaluation considered the impact of peak flows from reservoir operation because they create opportunities to develop new habitat through channel scour and deposition and they maintain existing habitat by controlling competing overstory vegetation the evaluation also considered water surface elevation changes during july and august the critical life stage period for orchid reproduction these three locations were chosen because they had appropriate data available and were representative of the river channel morphology and flows were used to pick appropriate stations upstream of the C canal diversion was chosen to represent new flow conditions from the proposed reservoirs to the C canal the south boneta station was chosen to represent the reach between that diversion and the red cap canal diversion the han hamilton dlton diton knudsen diversion was chosen to represent conditions between the red cap canal and the duchesne river these stations are representative of the reaches they represent the proposed action would have the following effects on river stages compared to baseline conditions see table 3.75 375 37 375 5 water surface elevation at the Q C canal diversion upper reach in july would decrease 0.4 04 04 foot in dry years decrease 0.3 03 03 foot in average years and not change in wet years in august it would decrease 06 0.6 06 og foot in dry years decrease 0.7 07 07 foot in average years and not change in dry years water surface elevation in the middle reach south boneta diversion in july and august would increase slightly up to 0.2 02 02 foot decrease slightly up to 0.2 02 02 ot foot or not change 3716 37 16 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/11893 |
