Record Details
page 1-8
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 1-8 Final Environmental Assessment for the Diamond Fork System Proposed Action Modifications, page 1-8 |
| Coverage | Electronic reproduction; |
| Format | 1-8 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; 1527 7527 752.7 152.7 7537 1537 diamond fork pipeline extension diamond fork pipeline extension with a capacity of 560 cfs cs would connect monks hollow overflow structure to the upstream end of the existing diamond fork pipeline see inset 6 map al A l 1 the mortar lined steel pipeline would be installed underground following the ground surface with a minimum 3 foot cover over the pipeline it would have air release and air vacuum valves and vaults incorporating manway access at various points along its length with the same design and surface features as the existing diamond fork pipeline the location of these appurtenances would be determined as part of the design process all vent structures would be screened with vegetation rocks andor soil mounds and colored using appropriate earth tone colors most of the pipeline extension would be installed under the existing diamond fork road or within the alignment of the new access road to the upper diamond fork tunnel portal see insets 5 and 6 map al A l 1 the diamond fork pipeline extension would cross the red hollow road once and cross under the creek draining from red hollow A 1 1150 150 foot segment of the pipeline under the road would be constructed in a steep hillside area that contains natural springs see inset 6 map al A l 1 special procedures would be used in this segment to convey the spring water under the pipeline and to protect nearby wetlands and riparian resources see inset 7 map AI al and section 152.9 1529 1529 in this EA the water supply to the wetland would be maintained during construction to avoid changes to the wetland surface area and plant communities the portions of the pipeline corridor that are not within the alignment of diamond fork road or the access road to the tunnel portal would be planted with indigenous shrubs native grasses and forbs in a natural pattern to blend with adjacent vegetation revegetated vegetated Re areas would be irrigated until the plants are established to further minimize the visual impacts of vegetation removal and soil disturbance 152.8 1528 1528 connection to diamond fork pipeline the connection of the diamond fork pipeline extension to the existing diamond fork pipeline would involve connecting the new 96 inch diameter pipe to an existing 96 inch pipe see insets 3 and 6 map al A l 1 A test bulkhead installed in the upstream end of the pipeline would be removed to complete the connection 152.9 1529 1529 access road and road reconstruction A new permanent 16 foot wide paved access road with side ditches and shoulders would be constructed for approximately 950 feet between diamond fork road and upper diamond fork tunnel outlet portal see insets 4 5 and 6 map al A l 1 A locked gate would be installed on the new road where it meets diamond fork road the road would be aligned to save existing trees and curve around vegetation to provide visual screening and avoid establishing a new corridor large junipers juniperus juni pers and gambel oak would be planted in a free form pattern in strategic locations to screen road cuts and fills A temporary construction access road with an average 12 percent grade would follow the same alignment as the permanent access road for 400 linear feet see insets 4 5 and 6 on map al A l 1 the temporary road would disturb about 450 linear feet in the lower corridor and about 235 linear feet in the upper corridor both which would be re vegetated with native grasses shrubs and trees following construction the re vegetated temporary road corridor would be irrigated until the plants are established to further minimize the visual impacts of vegetation removal and soil disturbance the detailed road design would address erosion control in ditches along the permanent and temporary access road ditches and drainage swales constructed along the road would be lined with native rock and excelsior erosion control blanket to control erosion cut and fill sections of the temporary and permanent access roads would be outsloped out sloped at 2 percent to disperse drainage before it can concentrate fill sections of the temporary and diamond fork proposed action modifications EA 18 1 8 |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/2955 |
