three rivers levee improvement authority june 8, 2007 presentation to the state reclamation board...

Three Rivers LeveeThree Rivers LeveeImprovement AuthorityImprovement Authority

June 8, 2007June 8, 2007

Presentation to thePresentation to theState Reclamation BoardState Reclamation Board

Proposed Feather River Proposed Feather River Setback LeveeSetback Levee

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Project GoalsProject Goals Achieving at least a 200 year level of Achieving at least a 200 year level of

public safety flood protection for south public safety flood protection for south Yuba County with regional, system, and Yuba County with regional, system, and environmental benefits;environmental benefits;

Completing the remaining major public Completing the remaining major public safety flood protection elements in 2007 safety flood protection elements in 2007 and 2008; andand 2008; and

Achieving a fair and equitable State-local Achieving a fair and equitable State-local cost share with the local cost share cost share with the local cost share generated through continued generated through continued development.development.

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OverviewOverview

History of the Setback LeveeHistory of the Setback Levee

Benefits of the Setback LeveeBenefits of the Setback Levee

Design, permitting, and construction Design, permitting, and construction scheduleschedule

Interplay with existing Implementation Interplay with existing Implementation Agreement and Funding AgreementAgreement and Funding Agreement

Presentation of Setback AlignmentPresentation of Setback Alignment

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OverviewOverview






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In 2003 the Yuba County Water Agency completed In 2003 the Yuba County Water Agency completed a Proposition 13 funded feasibility a Proposition 13 funded feasibility study/programmatic EIR identifying as feasible the study/programmatic EIR identifying as feasible the Feather River Setback Levee.Feather River Setback Levee.

In April 2005 the prior Reclamation Board approved In April 2005 the prior Reclamation Board approved the approach for Phases 1-3.the approach for Phases 1-3.

Phases 1-3 are now substantially complete.Phases 1-3 are now substantially complete.

The public-private partnership has been essential to The public-private partnership has been essential to public safety success in Yuba County, has resulted public safety success in Yuba County, has resulted in $135 million in flood protection improvements, in $135 million in flood protection improvements, and has been superior to the unacceptable public and has been superior to the unacceptable public safety risk that would be caused by the delay of safety risk that would be caused by the delay of waiting for the federal Yuba Basin Project.waiting for the federal Yuba Basin Project.

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History of the Setback LeveeHistory of the Setback Levee(continued)(continued)

In May 2006 the Reclamation Board approved an In May 2006 the Reclamation Board approved an approach for Phase 4 Feather River (strengthen-approach for Phase 4 Feather River (strengthen-in-place) and Yuba River.in-place) and Yuba River.

In August 2006 the first Landowner Capital Call In August 2006 the first Landowner Capital Call was made to fund construction of Phase 4 Yuba was made to fund construction of Phase 4 Yuba River repairs.River repairs.

Phase 4 Yuba River repairs are now substantially Phase 4 Yuba River repairs are now substantially complete.complete.

In November 2006, following Propositions 84 and In November 2006, following Propositions 84 and 1E, Three Rivers rescheduled the second Capital 1E, Three Rivers rescheduled the second Capital Call as allowed under the Second Implementation Call as allowed under the Second Implementation Agreement.Agreement.

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History of the Setback LeveeHistory of the Setback Levee(continued)(continued)

Three Rivers sought and received conceptual support Three Rivers sought and received conceptual support of Setback Levee from DWR.of Setback Levee from DWR.

Three Rivers received written support for Setback Three Rivers received written support for Setback Levee from Sutter County, Levee District 1, Friends of Levee from Sutter County, Levee District 1, Friends of the River, SYRCL, Sierra Club, Yuba County Water the River, SYRCL, Sierra Club, Yuba County Water Agency, SAFCA, and others.Agency, SAFCA, and others.

In February 2007, after extensive due diligence, In February 2007, after extensive due diligence, Three Rivers certified the EIR and selected the Three Rivers certified the EIR and selected the Setback Levee.Setback Levee.

In May of 2007 the Army Corps of Engineers certified In May of 2007 the Army Corps of Engineers certified Three Rivers’ completed construction.Three Rivers’ completed construction.

In May, Three Rivers also set a second capital call of In May, Three Rivers also set a second capital call of $9.1 million and that money has been deposited into $9.1 million and that money has been deposited into escrow.escrow.

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• Achieves 200 Year Protection

• Approx. 13 miles

• Segments 1 & 3 strengthen-in-place

• Segment 2 setback with new levee construction

Phase 4 - Feather River includingSetback Levee

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OverviewOverview






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1.1. Provides superior flood protection for south Provides superior flood protection for south Yuba County.Yuba County.

2.2. Provides regional flood protection benefits for Provides regional flood protection benefits for Sutter County, Yuba City, Marysville, and Linda.Sutter County, Yuba City, Marysville, and Linda.

3.3. Proposed Setback is consistent with FloodSAFE Proposed Setback is consistent with FloodSAFE California and is the most significant structural California and is the most significant structural change to the system likely to be constructed change to the system likely to be constructed in the next few years.in the next few years.

4.4. Creates up to 1550 acres of habitat for Creates up to 1550 acres of habitat for restoration and mitigation.restoration and mitigation.

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1. Superior Flood Protection1. Superior Flood Protection

Built to current engineering standardsBuilt to current engineering standards Built with suitable soilsBuilt with suitable soils

(current levee soil is too sandy) (current levee soil is too sandy) Removes river choke point and widens Removes river choke point and widens

floodwayfloodway Built away from old river channelsBuilt away from old river channels Eliminates significant erosion sitesEliminates significant erosion sites Achieves greater than 200-year Achieves greater than 200-year

protection in certain reachesprotection in certain reaches

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2. Regional Flood Protection 2. Regional Flood Protection BenefitsBenefits

Channel widening creates lower water surface Channel widening creates lower water surface elevations:elevations: Water surface reduction benefits to Marysville and Yuba Water surface reduction benefits to Marysville and Yuba

City (RM 27.0) of 1.3 feet for 100 year and 1.5 feet for 200 City (RM 27.0) of 1.3 feet for 100 year and 1.5 feet for 200 year.year.

Maximum water surface reduction (RM23.5) of 2.7 for 100 Maximum water surface reduction (RM23.5) of 2.7 for 100 year and 3.0 for 200 year.year and 3.0 for 200 year.

Because of the regulated nature of the Feather River Because of the regulated nature of the Feather River and the addition of 1550 acres to the floodway, and the addition of 1550 acres to the floodway, there are no downstream hydraulic impacts.there are no downstream hydraulic impacts.

Regional support letters have been received.Regional support letters have been received.

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Water Surface Elevations Water Surface Elevations Compared to Recent Flood Compared to Recent Flood

EventsEvents

WSE = Water Surface ElevationWSE = Water Surface Elevation PLM = Project Levee MilePLM = Project Levee Mile

SourcesSources1/ Sacramento River Flood Control System Evaluation, Initial Appraisal Report, 1/ Sacramento River Flood Control System Evaluation, Initial Appraisal Report,

Marysville/Yuba City Area, January 1990, Plates 4 & 7Marysville/Yuba City Area, January 1990, Plates 4 & 72/ MBK H&H Report for Alternatives Analysis Report, December 2006, Figures 3 & 2/ MBK H&H Report for Alternatives Analysis Report, December 2006, Figures 3 &

15153/ MBK H&H Report for Alternatives Analysis Report, December 2006, Table 73/ MBK H&H Report for Alternatives Analysis Report, December 2006, Table 7

Table Developed 2/21/07Table Developed 2/21/07

1986 1997 With Setback With SetbackLocation River PLM WSE 1/ WSE 2/ 100 yr WSE 3/ 200 yr WSE 3/

Marysville Yuba 2.6 77.1 78.5 73.9 77.2

UP Railroad Yuba 0.9 72.5 75 72.6 75.9

~Olivehurst Feather 25.0 71 72.5 69.6 72.8

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3. Setback is consistent with 3. Setback is consistent with FloodSAFE CaliforniaFloodSAFE California

Proposed project meets or exceeds all of Proposed project meets or exceeds all of the California FloodSAFE criteria.the California FloodSAFE criteria.

California FloodSAFE acknowledges that California FloodSAFE acknowledges that system changes must be made to reduce system changes must be made to reduce endless erosion and O&M battle and costs.endless erosion and O&M battle and costs.

Proposed project is regularly mentioned by Proposed project is regularly mentioned by DWR as the type of project that DWR DWR as the type of project that DWR wants to fund.wants to fund.

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4. Creates up to 1550 acres of 4. Creates up to 1550 acres of habitat for restoration and habitat for restoration and

mitigationmitigation The 1550 acres could be used for:The 1550 acres could be used for:

Mitigation bankingMitigation banking Habitat restoration and enhancementHabitat restoration and enhancement State owned land leased back for agricultural useState owned land leased back for agricultural use

Adds a significant increment to the Adds a significant increment to the existing riparian corridor along the Feather existing riparian corridor along the Feather River.River.

Three Rivers will assure that adequate Three Rivers will assure that adequate agreements are in place for Three Rivers agreements are in place for Three Rivers and/or DWR to perform necessary and/or DWR to perform necessary maintenance in the restoration area.maintenance in the restoration area.

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OverviewOverview






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Design, Permitting, and Design, Permitting, and Construction ScheduleConstruction Schedule

Segments 1 and 3 are out for bidSegments 1 and 3 are out for bid..

Segment 2 design is underway.Segment 2 design is underway.

Phase 4 Feather River strengthen-in-Phase 4 Feather River strengthen-in-place and setback levee construction to place and setback levee construction to start in 2007.start in 2007.

Voluntary and eminent domain land Voluntary and eminent domain land acquisition to be handled in stages in acquisition to be handled in stages in advance of construction.advance of construction.

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Design, Permitting, and ConstructionSchedule

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OverviewOverview






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Interplay with Existing Interplay with Existing Implementation Agreement Implementation Agreement

and Funding Agreementand Funding Agreement As with Bear River Setback Levee, multiple funding As with Bear River Setback Levee, multiple funding

sources are required to fund a more extensive sources are required to fund a more extensive project with regional, system, and environmental project with regional, system, and environmental benefits.benefits.

Because Three Rivers selected the Setback Levee, Because Three Rivers selected the Setback Levee, Three Rivers and the Landowners are meeting to Three Rivers and the Landowners are meeting to discuss an amendment to the Funding Agreement discuss an amendment to the Funding Agreement to address the changed scope of the project. to address the changed scope of the project.

In addition to the Landowners, to achieve the In addition to the Landowners, to achieve the Feather River Setback Levee, the State will need to Feather River Setback Levee, the State will need to provide timely funding to meet project milestones.provide timely funding to meet project milestones.

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OverviewOverview






three rivers levee improvement authority june 8, 2007 presentation to the state reclamation board...

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