FERC Project No. 2079 - PCWA Middle Fork American River Project ...

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Application for New License Middle Fork American River Project (FERC Project No. 2079) Proposed Action are depicted on BA/BE Maps 3a–e, and land jurisdictions in the immediate vicinity of the MFP are shown on Exhibit E – Section 4.0, Maps 4-2–e. Changes under the Proposed Action are described below, organized by facility type. 4.2.1.1 Large Dams and Reservoirs • French Meadows Dam Outlet Works (modified) French Meadows Dam Outlet Works will be modified as part of the French Meadows Outlet Works Modification to provide and monitor new MIFs, pulse flows, and downramp or spill flow requirements under the Proposed Action. In addition, two new gages will be installed to monitor compliance with instream flow requirements. • Hell Hole Dam Outlet Works (modified) Hell Hole Dam Outlet Works will be modified as part of the Hell Hole Dam Outlet Works Modification to provide and monitor new MIFs, pulse flows, and downramp or spill flow requirements under the Proposed Action. Hell Hole Dam will be modified as part of the Hell Hole Reservoir Seasonal Storage Increase Improvement by adding 6-foot-high crest gates on the existing Hell Hole Dam Spillway. These crest gates may be raised under certain conditions to increase Hell Hole Reservoir storage. 4.2.1.2 Medium Dams and Reservoirs • Middle Fork Interbay Dam Outlet Works (modified) Middle Fork Interbay Dam Outlet Works will be modified to meet new MIFs. • Ralston Afterbay Dam Outlet Works A new gage will be installed at the Ralston Afterbay Dam Outlet Works to monitor MIFs. 4.2.1.3 Small Dams and Diversion Pools The small diversions on Duncan Creek, North Fork Long Canyon Creek, and South Fork Long Canyon Creek will be modified to increase natural sediment delivery and transport of bedload and fine material downstream. Activities at the small diversions include installation of self-cleaning wedge-wire screens at the dams, modification of the low-level outlets to release the required instream flows, and modification or installation of gages. The small diversion modifications will result in diversion pools that are shallower and more riverine. February 2011 4-41
Application for New License Middle Fork American River Project (FERC Project No. 2079) 4.2.1.4 Water Conveyance Systems The Proposed Action has no new or modified water conveyance systems . 4.2.1.5 Powerhouses The Proposed Action has no new or modified powerhouses. 4.2.1.6 Gaging Stations Stream Gages The following gages will only be used to monitor instream flow requirements until new gages are installed (BA/BE Table 21). • Duncan Creek near French Meadows (interim) The gage at Duncan Creek near French Meadows (USGS Gage No. 11427700) will continue to monitor MIFs for compliance with the new license until the Duncan Creek Diversion Dam Modification is completed. • Rubicon River below Hell Hole Dam (interim) The gage at Rubicon River below Hell Hole Dam (USGS Gage No. 11428800) will monitor MIFs for compliance with the existing license conditions until the Hell Hole Dam Outlet Works Modification is completed. • North Fork Long Canyon Creek below Diversion Dam (interim) The gage at North Fork Long Canyon Creek below Diversion Dam (USGS Gage No. 11433085) will monitor MIFs for compliance with the existing license conditions until the North Fork Long Canyon Diversion Dam Modification is completed and the new gage at North Fork Long Canyon Creek below Diversion Dam is constructed. • South Fork Long Canyon Creek below Diversion Dam (interim) The gage at South Fork Long Canyon Creek below Diversion Dam (USGS Gage No. 11433065) will continue to monitor MIFs for compliance with the existing license conditions until the South Fork Long Canyon Diversion Dam Modification is completed and the new gage at South Fork Long Canyon Creek below Diversion Dam is constructed. • Middle Fork American River below Interbay Dam (interim) The gage at Middle Fork American River below Interbay Dam (USGS Gage No. 11427770) will monitor MIFs for compliance with the existing license conditions until the Middle Fork Interbay Dam Outlet Works Modification is February 2011 4-42
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MFP Relicensing Process Application
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Sacramento Fish & Wildlife Office S
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Sacramento Fish & Wildlife Office S
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June 2008 i TABLE OF CONTENTS Page
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1.0 INTRODUCTION This report presen
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Hell Hole Reservoir (207,590 ac-ft
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PCWA also implements routine mainte
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2.4.2 French Meadows Powerhouse Cap
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3.3 CRLF HABITAT CHARACTERISTICS Av
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Refer to the Draft Physical Habitat
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4.2 KNOWN CRLF RECORDS 4.2.1 Record
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4.4 UPLAND AND AQUATIC HABITAT CHAR
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v-shape to a wider u-shaped cross-s
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The following briefly describes aqu
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composed of small to medium-sized a
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The North and South Fork Long Canyo
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(USDA-FS 2003). The surveyor conclu
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granite wall and a sandbar. The pon
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and: (3) support dense, bramble-for
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———. 2007b. Consulting herpet
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Table 1. Aquatic Habitats in the CR
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Table 3. Upland Vegetation Communit
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Table 5. Data Summary for Large, Mo
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Table 6. Data Summary for Diversion
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APPENDIX B Descriptions of Upland V
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Upper Montane Mixed Chaparral (CX)
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(Quercus lobata), or blue oak, in a
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Willow-Alder (QY) This community is
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Site Assessment reviewed by: (FWS F
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California Red-Legged Frog Habitat
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Placer County Water Agency Middle F
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FINAL List of Tables Table AQ 12 CR
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FINAL 3.1. STUDY ELEMENTS COMPLETED
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FINAL 5.1.2. Night Surveys Four nig
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FINAL Larval and metamorph Pacific
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FINAL Table AQ 12 CRLF-1. Californi
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FINAL FINAL_AQ 12_CRLF_Text_Feb 201
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Alvarez, J. A. 2006. Masticophis la
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J. ALVAREZ Jones and Stokes Associa
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Peter J. Graf Research Assistant -
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Page 2 of 3 Ann M. Crisp (FERC) for
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FINAL APPENDIX C California Red-leg
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FINAL Ralston Ridge Pond Field Surv
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FINAL Survey results reviewed by: (
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FINAL Horseshoe Pond C Field Survey
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FINAL Horseshoe Pond E Field Survey
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FINAL Horseshoe Pond F Field Survey
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FINAL Representative Habitat Photog
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