Channel Rehabilitation Projects TAMWG - June ‘04 Trinity River at Hocker Flat 1/16/2003.
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Transcript of Channel Rehabilitation Projects TAMWG - June ‘04 Trinity River at Hocker Flat 1/16/2003.
Channel Rehabilitation ProjectsTAMWG - June ‘04
Trinity River at Hocker Flat 1/16/2003
Effects of Trinity and Lewiston Effects of Trinity and Lewiston Dams Dams
on channel morphology and on channel morphology and fish habitatfish habitat
at low flows
at high flows
Riparian berms
Rehabilitation Site Rehabilitation Site ObjectivesObjectives
Remove encroached riparian vegetationRemove encroached riparian vegetation Take the “handcuffs” off the riverTake the “handcuffs” off the river
Initiate natural river processesInitiate natural river processes Re-scale floodplain for current and Re-scale floodplain for current and
anticipated flow regimeanticipated flow regime Allow the river to create needed habitat Allow the river to create needed habitat
varietyvariety Revegetate in accordance with required Revegetate in accordance with required
permitspermits
Hocker FlatDesign and Area Delineation:
Riverine Upland Staging/Access
Design CriteriaDesign Criteria Dry winter low water surface elevationDry winter low water surface elevation
Feathered edgesFeathered edges Seasonal groundwater for revegetationSeasonal groundwater for revegetation
1.5 year recurrance frequency water surface 1.5 year recurrance frequency water surface elevationelevation Floodplain excavationFloodplain excavation
Theoretical river meander dimensionTheoretical river meander dimension
Floodplain management considerationsFloodplain management considerations FEMA “Detailed Study Area” design restrictionsFEMA “Detailed Study Area” design restrictions
Engineering DesignEngineering Design
Concept Cross-SectionsConcept Cross-Sections
Excavated Material Placed On Top Of Tailings
RiparianVegetationRemoved HWY
299
HWY299
Excavated Material Placed On Top Of Tailings
Gently SlopingGravel Bar
Gently Sloping GravelBar And Floodplain
Native Vegetation ReplantedOn Floodplains And Terraces
= High Flows= Low Flows= Excavated Material
RiparianVegetationRemoved
Native VegetationReplanted On Terraces
NativeVegetationReplanted
On Terraces
Feathered Edge And Floodplain Concept
Feathered Edge Concept
Dredge Tailings
= High Flows= Low Flows= Excavated Material
Dredge Tailings
NativeVegetationReplanted
On Terraces
Hocker Flat Rehabilitation Site Property Ownership
012-120-0600Smith
012-120-4200Smith
012-120-4100
Merritt
012-260-2000
Bramlett
012-260-8100Bailey
012-260-1600Fornaciari
012-26-5600Burke
012-260-4400
Helberg
012-120-4800
Bartoshek
012-120-4200Smith
012-260-1400/1500Dills
012-120-3300/3900McLaughlin
012-140-0100/0200McDuffey
Hocker Flat ScheduleHocker Flat Schedule
Complete Public Scoping…………………Complete Public Scoping………………… July 2004 July 2004 Begin Public Review Draft EA/EIR … … Begin Public Review Draft EA/EIR … …
September 2004September 2004 Final EA/EIR …………………………... November 2004Final EA/EIR …………………………... November 2004 Award Construction Contract …………... February Award Construction Contract …………... February
20052005 Begin Construction …………………….. April 2005Begin Construction …………………….. April 2005 Complete Construction ………………... September Complete Construction ………………... September
20052005 Initiate Revegetation …………………..... November Initiate Revegetation …………………..... November
20052005
Rehabilitation Sites Below Canyon Creek
Below Canyon Creek Below Canyon Creek ScheduleSchedule(4 sites)(4 sites)
Complete Public Scoping…………………Complete Public Scoping………………… January 2005 January 2005 Begin Public Review Draft EA/EIR … … Begin Public Review Draft EA/EIR … … February 2005February 2005 Final EA/EIR …………………………... May 2005Final EA/EIR …………………………... May 2005 Award Construction Contract …………... August 2005Award Construction Contract …………... August 2005 Begin Construction …………………….. September 2005Begin Construction …………………….. September 2005 Complete Construction ………………... February 2006Complete Construction ………………... February 2006 Initiate Revegetation …………………..... November 2006Initiate Revegetation …………………..... November 2006 Complete Revegetation …………………..... March 2007Complete Revegetation …………………..... March 2007
Channel and Floodplain Channel and Floodplain Rehabilitation SitesRehabilitation Sites
Channel Rehabilitation Sites (24)Channel Rehabilitation Sites (24)Implementation ScheduleImplementation Schedule
RehabilitatiRehabilitation Siteson Sites
20042004 20052005 20062006 20072007 20082008 20092009
REVEG
REVEG
REVEG
DESIGN, NEPA/CEQA CONST.
DESIGN, NEPA/CEQA CONST.
DESIGN, NEPA/CEQA CONST.
Hocker FlatHocker Flat
Sites BelowSites BelowCanyon CreekCanyon Creek
10 Sites Below10 Sites BelowLewiston DamLewiston Dam
Remaining 9Remaining 9SitesSites
DESIGN, NEPA/CEQA CONST. REVEG.
Rehabilitation Site IssuesRehabilitation Site Issues
FEMAFEMA
RealtyRealty
RevegetationRevegetation
Environmental ComplianceEnvironmental Compliance
Environmental ComplianceEnvironmental Compliance
National Environmental Policy Act (NEPA)National Environmental Policy Act (NEPA) Requires federal agencies to analyze and Requires federal agencies to analyze and
disclose the environmental effects of their disclose the environmental effects of their proposed actionsproposed actions
California Environmental Quality ActCalifornia Environmental Quality Act State equivalent to NEPA….. butState equivalent to NEPA….. but ALSO – ALSO – Requires Requires REDUCINGREDUCING environmental effectsenvironmental effects
Both promote efforts to minimize Both promote efforts to minimize environmental effects via public environmental effects via public
participation and participation and documentationdocumentation
NEPA:NEPA: Federal Federal Lead = Agency with primary responsibility for Lead = Agency with primary responsibility for
preparing an Env. Documentpreparing an Env. Document
U.S. Bureau of Reclamation U.S. Bureau of Reclamation (Trinity River Restoration Program)(Trinity River Restoration Program)
Cooperating Agency = jurisdiction by law or special Cooperating Agency = jurisdiction by law or special expertise expertise
U.S. Bureau of Land ManagementU.S. Bureau of Land Management CEQA:CEQA: State State
Lead = State Agency with primary project Lead = State Agency with primary project responsibility responsibility
California Department of Water ResourcesCalifornia Department of Water Resources Responsible Agencies Responsible Agencies Trustee AgenciesTrustee Agencies
Environmental Environmental DocumentsDocuments
EA/EIR Hocker Flat: Fall 2004EA/EIR Hocker Flat: Fall 2004
EA/EIR Canyon Creek Suite: Spring 2005EA/EIR Canyon Creek Suite: Spring 2005
EA/EIR Upstream 10: Fall/Winter 2006EA/EIR Upstream 10: Fall/Winter 2006
EA/EIR Remaining 9: Fall/Winter 2007EA/EIR Remaining 9: Fall/Winter 2007 MASTER EIR? - Site specific MASTER EIR? - Site specific
detailsdetailsMultiple Neg. Decs.Multiple Neg. Decs.
EA/EIRsEA/EIRs
Environmental PermitsEnvironmental Permits Army Corps of Engineers: Army Corps of Engineers:
Section 404 Clean Water Act permitSection 404 Clean Water Act permit Endangered Species Compliance:Endangered Species Compliance:
National Oceanic & Atmospheric Administration: National Oceanic & Atmospheric Administration: Fisheries – Biological OpinionFisheries – Biological Opinion
US Fish & Wildlife Service US Fish & Wildlife Service North Coast Regional Water Quality Control North Coast Regional Water Quality Control
Board: Section 401 Water Quality Board: Section 401 Water Quality CertificationCertification
California Department of Fish and Game: California Department of Fish and Game: Section 1600 Streambed Alteration Section 1600 Streambed Alteration AgreementAgreement
Trinity County Ordinances: Trinity County Ordinances: Floodplain ordinanceFloodplain ordinance
Environmental ComplianceEnvironmental Compliance MercuryMercury
Initial Studies Initial Studies Project Impacts to bioavailability & Trinity Project Impacts to bioavailability & Trinity
RevegetationRevegetation Balance mitigation vs. functionBalance mitigation vs. function
Pre-application MeetingsPre-application Meetings (options to (options to
consolidate)consolidate) Timing of constructionTiming of construction
Sediment controlSediment control Vegetation removalVegetation removal
Photo of mining on Hocker flat from Jim Photo of mining on Hocker flat from Jim SmithSmith