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