Record Details
page 3-11
Digital Collections at BYU
| Field | Value |
|---|---|
| Title | page 3-11 Final Environmental Assessment for the Diamond Fork System Proposed Action Modifications, page 3-11 |
| Coverage | Electronic reproduction; |
| Format | 3-11 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; COMMENT 3.13 313 313 A major concern is how the intermittent stream channel covered by the portal pad and accessing roadway and pipelines will be addressed our experience in the general area indicates that these types of drainages experience flows of 50150 50 150 cfssquare mile of drainage area during extreme runoff events these flows contain large quantities of debris soil rocks vegetation etc and consequently culverts cu lverts sometimes become plugged and fail flattening the slope of the stream channel or drainage structure through the pad and roadpipeline road pipeline prism may result in significant debris deposition there the EA depicts a drainage ZD structure through the site but it is not clear as to how this structure will address the concern described above this shold be addressed in the detailed design RESPONSE 3.13 313 the configuration of the upper diamond fork tunnel outletportalyard outlet portal yard and monks hollow overflow structure lias has ilas been revised including the drainaq drainage e structure and runoff conveyance thror through h rhe the theportal portal yardarea yard area the revised drainage drainag ge and runoff conveyance plan is shown on inset 4 map al A l 1 lined draina drainage e bypass ditches would convey runoff water around the east and south perimeters peri meters of the portal yard to a rock lined channel at the toe of theportalyardfill the portal yard fill slope the rock lined channel wouldre would wouldve reconnect tothe to the existing intermittent channel below theportalyard the portal yard area the ditches and constructed channel would have a total length of 560feet 560 feet the slopes of the theportalyardperimeter portal yard perimeter perlmeter ditches would wouldbe wouldve be flatter than the surro surroundin surrounding undin natural topography and likely would result in some debris deposition the district would maintain the ditches to convey runoff water around th the e portal yard area seechapterl see chapter 1 section 152.4 1524 1524 in ih the e final EA for a revised description COMMENT 3.14 314 314 road closure at red ledges the EA indicates the diamond fork road would be closed during construction at red ledges to facilitate a safe and all weather turnaround tum turn around for forest visitors the turnaround may need to be graveled or hardened RESPONSE 3.14 314 314 thank thankyouforyour you for your comment this requirement has been added to chapter 1 section 152.9 1529 1529 and app appendix en diw dix dew A part I 1 of th the e fin finai final al EA 311 3 11 diamond fork proposed action modifications EA |
| Identifier | http://cdm15999.contentdm.oclc.org/cdm/ref/collection/WesternWatersProject/id/2987 |
