February 11, 2020 Overview / Board Policies Strategic Assessments - - PowerPoint PPT Presentation

Real Property and Asset Management Committee Item 6a February 11, 2020

Overview / Board Policies Strategic Assessments Management Actions Next Steps

Real Property & Asset Management Item #6a February 11, 2020 2

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6 Delta & Suisun Marsh properties 20,400+ acres (13 sq. miles) 111 structures (houses, farm facilities) Bridges, auto ferry, boat docks, pumps In-Delta Freshwater Pathway

WEBB TRACT HOLLAND TRACT CHIPPS ISL. TULE RED

Brannan Island Twitchell Island Bethel Island Sherman Island Bradford Island Jersey Island Hotchkiss Tract

Franks Tract

Palm Tract

Decker Island

Veale Tract

Oakley Antioch

Van Sickle Island

Jones Tract

Big Break

Andrus Island

Terminous Tract

TyIer Island

Pittsburg

Winter Island Browns Island Sherman Lake

Empire Tract

West Isl. Kimball Isl.

Grizzly Bay

West Sherman Island

Rio Vista

Spinner Island Mallard Isl.

Medford Island Quimby Island

Little Mandeville Island

Mildred Island

MacDonald Island

Orwood Tract

Brentwood

Byran Tract Union Island

Ryer Island

Honker Bay Simmons Island

BACON ISLAND BOULDIN ISLAND

Venice Island Staten Island Mandeville Island Woodward Island Victoria Island

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Notice of Preparation

Alignment options 1

Central Tunnel Corridor Eastern Tunnel Corridor

1 tunnel up to 6,000 cfs 2 intakes (3,000 cfs each) 2 forebays

Intermediate/Southern

Pumping plant & South Delta facilities

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• 1. NOP identifies two options (Central and

Eastern Corridor; Final choice of potentially feasible alternatives for Draft EIR will be made after receipt of scoping comments

Bay Delta

Focus on

Science & Research System Reliability Environmental Protection & Ag Sustainability

Real Property & Asset Management Item #6a February 11, 2020 5

Science & Research

Conduct applied science Base all actions on comprehensive science

System Reliability

Improve water quality & supply reliability Secure levees along freshwater pathway Limit land subsidence Seek emergency response plan approval Complete emergency preparedness measures

Environmental Protection & Ag Sustainability

Advance ecosystem restoration actions Select and finance habitat opportunities Develop sustainable agriculture programs Limit carbon production Reduce climate change risks

Real Property & Asset Management Item #6a February 11, 2020 6

Overview / Board Policies Strategic Assessments Management Actions Next Steps

Liquefiable Sands Peat Sands|Silts|Clays

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Landscape Issues & Opportunities

At sea-level Unknown None

PRE-1880

CURRENT

INCREASED

SEEPAGE

LAND ELEVATION

• 10 to 30 ft.

SUBSIDENCE

• 0.5 to 1.5

inch/yr.

SEA LEVEL

+ 0.2 to 1.5 inch/yr.

• 10 to 30 feet

below sea-level + 0.2 to 1.5 inch/yr .

(+1 to 10 ft. by 2100)

• 0.5 to 1.5 inch/yr

.

(-3 to 10 ft. by 2100)

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Actual sea level in the past 130 years is 0.64 feet

Landscape Issues & Opportunities

CURRENT

INCREASED

SEEPAGE

LAND ELEVATION

• 10 to 30 ft.

SUBSIDENCE

• 0.5 to 1.5

inch/yr.

SEA LEVEL

+ 0.2 to 1.5 inch/yr.

• 10 to 30 feet

below sea-level + 0.2 to 1.5 inch/yr .

(+1 to 10 ft. by 2100)

• 0.5 to 1.5 inch/yr

.

(-3 to 10 ft. by 2100)

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Landscape Issues & Opportunities

FUTURE OPPORTUNITIES

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Carbon sequestration & regenerative agriculture projects Delta Conveyance & Freshwater Pathway projects Integrated landscape management

Soil Accretion +1 to 2 inch/yr . 1 (+ 7 to 14 ft. by 2100)

1 Based on Twitchell Island and other habitat restoration projects

Widen crown to allow habitat

Landscape Issues & Opportunities

Levee Improvements

0% 5% 10% 15% 20%

Staten Bouldin Bacon Jersey

Levee Failure Risk by 2070

FUTURE OPPORTUNITIES

• 1. Source: “Subsidence and levee failure in the California Delta: A proof-of-concept study demonstrates rice and wetland implementation strategy to reduce probability of failure” Bachand

& Associates, Stillwater Sciences, Hydrofocus, and San Francisco State University

• 2. The analysis looked at two primary modes of failure -static stability and piping failures; The analysis does not consider changes to the dynamic stability/seismic failure risks, over-topping

risks, or ongoing annual levee improvements currently taking place.

50% reduction in risk with wetlands1,2

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Landscape Issues & Opportunities

Bract Tract Louisiana Netherlands

… Leveraging Successful Approaches

Real Property & Asset Management Item #6a Slide 12 February 11, 2020

FUTURE OPPORTUNITIES Landscape Issues & Opportunities

Delta Conveyance

In conjunction with DWR, developed conceptual plan for utilizing MWD properties to accommodate certain mitigation1 Ongoing discussion with DWR & Design Construction Authority as potential alignments are revised

System Reliability

Real Property & Asset Management Item #6a February 11, 2020 13

Delta Conveyance Mitigation

Mitigation 4,900 ac. Ag preservation 14,330 ac. TOTAL 19,230 ac.

MWD Property Available

TOTAL 20,400 ac.

1.Acreage based on 2018 Cal WaterFix twin tunnel design; Potential future mitigation for single tunnel approach still to be determined. MWD staff concept not yet analyzed or approved by DCA, DWR,

• r MWD Board

System Reliability

Real Property & Asset Management Item #6a February 11, 2020 14

Delta Conveyance Mitigation

Mitigation 4,900 ac. Ag preservation 14,330 ac. TOTAL 19,230 ac.

MWD Property Available

TOTAL 20,400 ac.

Regenerative Ag Tunnel Portal Riparian Tidal Marsh Ag Preservation & Rice Native Grasses Managed Wetlands Fishing Access Science Center

Bouldin Island – Mitigation Conceptual Plan

1.Acreage based on 2018 Cal WaterFix twin tunnel design; Potential future mitigation for single tunnel approach still to be determined. MWD staff concept not yet analyzed or approved by DCA, DWR,

• r MWD Board

Delta Conveyance

In conjunction with DWR, developed conceptual plan for utilizing MWD properties to accommodate certain mitigation1 Ongoing discussion with DWR & Design Construction Authority as potential alignments are revised

Delta Conveyance

Provided DWR access to conduct geotechnical & environmental investigations1

System Reliability

Real Property & Asset Management Item #6a February 11, 2020 15

Soil Borings for Tunnel Portal Sites DWR Geotechnical Investigation

1.In the Notice of Preparation released in January 2020, the State indicated two alignment options (central and eastern). Final choice of potentially feasible alternatives for Draft EIR will be made after receipt of scoping comments

Levee Void Detection Illustration Freshwater Pathway

Continuing seismic analyses to better understand levee risks and focus solutions Analyzing new levee void detection monitoring technologies

Real Property & Asset Management Item #6a February 11, 2020 16

System Reliability

Invasive Species Control

Working with California Department of Fish & Wildlife

• n invasive species control

Cameras and detection station setup on Bacon Isl. Used to detect if Nutria are presence Coordinating with CDFW &

• thers on use of detection

dogs

Real Property & Asset Management Item #6a February 11, 2020 17

Environmental Protection

Invasive species control detection dogs

Mel Tucker –Farm security, dog handler

Invasive Species Control

Real Property & Asset Management Item #6a February 11, 2020 18

Environmental Protection

Invasive Species Control

Working with California Fish & Wildlife on invasive species control Cameras and detection station setup on Bacon Isl. Used to detect if Nutria are presence Coordinating with CDFW &

• thers on use of detection

dogs

Nutria Detection Station –Bacon Island

Kyle Beardsley, Nutria Specialist, Cal Dept. of Fish & Wildlife

Fishery Research

Islands provide a platform to conduct long-term aquatic research MWD salmon predation study

Real Property & Asset Management Item #6a February 11, 2020 19

Environmental Protection

Bouldin Island MWD Salmon Predation Study

Bouldin Island Research Pilot Concepts

Wetlands (tule, rice, etc.) Paludiculturecultivated wetlands Regenerative agriculture Floating peat wetlands

Benefits

Reduce land subsidence Enhance marginal farm land Reduce sea-level rise impacts Secure carbon capture credits Enhance habitat restoration Limit herbicide & pesticide usage

Real Property & Asset Management Item #6a February 11, 2020 20

Wetlands Paludiculture Regenerative Agriculture Floating Peat Wetland

Environmental Protection & Ag Sustainability

Louisiana Floating Peat Wetland

• Dr. Chris Swarzenski, USGS Louisiana Water Science Center

Floating Peat Wetland Research

Real Property & Asset Management Item #6a February 11, 2020

Environmental Protection & Ag Sustainability

Floating Peat Wetlands

From Louisiana to Nova Scotia, and Africa to Netherlands Can restore subsided lands to productive wetlands faster Benefits terrestrial and aquatic species, water quality, etc. MWD initiated research taking place on Bouldin Island Working with DWR, Hydrofocus, UC Davis, UC Berkeley, U.S . Geological Survey, Louisiana State University, Univ. of Montana, etc.

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UC Davis Carbon Research Station

Real Property & Asset Management Item #6a February 11, 2020

Environmental Protection & Ag Sustainability

Carbon Sequestration

Developing carbon credit protocol with The Nature Conservancy Environmental Defense Fund Delta Conservancy UC Davis, Berkeley, Riverside Air Resources Board/ American Carbon Registry Others Potential pilot wetland project

• n MWD property

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Real Property & Asset Management Item #6a February 11, 2020 23

Overview / Board Policies Strategic Assessments Management Actions Next Steps

Flood Fight Supplies Storage Units DWR Stockton Rock Warehouse Freshwater Pathway

Levee improvements projects along Delta freshwater pathway Larger rock stockpiles complete Initiating smaller rock stockpiles

• n MWD properties

Assisted in developing State Emergency Response Plan

Real Property & Asset Management Item #6a February 11, 2020 24

System Reliability

DWR Stockton Rock Stockpile Bacon Island Levee Improvement

25 WEBB TRACT HOLLAND TRACT CHIPPS ISL. TULE RED

Brannan Island Twitchell Island Bethel Island Sherman Island Bradford Island Jersey Island Hotchkiss Tract

Franks Tract

Palm Tract

Decker Island

Veale Tract

Oakley Antioch

Van Sickle Island

Jones Tract

Big Break

Andrus Island

Terminous Tract

TyIer Island

Pittsburg

Winter Island Browns Island Sherman Lake

Empire Tract

West Isl. Kimball Isl.

Grizzly Bay

West Sherman Island

Rio Vista

Spinner Island Mallard Isl.

Medford Island Quimby Island

Little Mandeville Island

Mildred Island

MacDonald Island

Orwood Tract

Brentwood

Byran Tract Union Island

Ryer Island

Honker Bay Simmons Island

BACON ISLAND BOULDIN ISLAND

Venice Island Staten Island Mandeville Island Woodward Island Victoria Island

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Environmental Protection

Real Property & Asset Management Item #6a February 11, 2020 25

Habitat Restoration

Chipps Island – Board authorized sale in 2019 to State DWR for restoration Tule Red – Completed habitat restoration in 2019 Mitigation Credits – Habitat restoration credited under Cal EcoRestore & USFWS Biological Opinion

Chipps Island & Tule Red Habitat Restoration

26 WEBB TRACT HOLLAND TRACT CHIPPS ISL. TULE RED

Brannan Island Twitchell Island Bethel Island Sherman Island Bradford Island Jersey Island Hotchkiss Tract

Franks Tract

Palm Tract

Decker Island

Veale Tract

Oakley Antioch

Van Sickle Island

Jones Tract

Big Break

Andrus Island

Terminous Tract

TyIer Island

Pittsburg

Winter Island Browns Island Sherman Lake

Empire Tract

West Isl. Kimball Isl.

Grizzly Bay

West Sherman Island

Rio Vista

Spinner Island Mallard Isl.

Medford Island Quimby Island

Little Mandeville Island

Mildred Island

MacDonald Island

Orwood Tract

Brentwood

Byran Tract Union Island

Ryer Island

Honker Bay Simmons Island

BACON ISLAND BOULDIN ISLAND

Venice Island Staten Island Mandeville Island Woodward Island Victoria Island

Chipps Island

Van Sickle Island Honker Bay Pittsburg

`

Cal DWR

(734 ACRES)

MWD

(243 ACRES) 26

Environmental Protection

Real Property & Asset Management Item #6a February 11, 2020 26

Chipps Island & Tule Red Habitat Restoration

Habitat Restoration

Chipps Island – Board authorized sale in 2019 to State DWR for restoration Tule Red – Completed habitat restoration in 2019 Mitigation Credits – Habitat restoration credited under Cal EcoRestore & USFWS Biological Opinion

Cal Fish & Wildlife Property

Tule Red

Grizzly Bay

Environmental Protection

Real Property & Asset Management Item #6a February 11, 2020 27

Habitat Restoration

Chipps Island – Board authorized sale in 2019 to State DWR for restoration Tule Red – Completed habitat restoration in 2019 Mitigation Credits – Habitat restoration credited under USFWS Biological Opinion & California EcoRestore

Environmental Protection

Real Property & Asset Management Item #6a February 11, 2020

Tule Red Habitat Restoration Chipps Island Habitat Restoration

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Habitat Restoration

Chipps Island – Board authorized sale in 2019 to State DWR for restoration Tule Red – Completed habitat restoration in 2019 Mitigation Credits – Habitat restoration credited under USFWS Biological Opinion & California EcoRestore

45 abandoned structures 22 removed thru 2019 23 to be removed in 2020

Real Property & Asset Management Item #6a February 11, 2020 29

Bacon Island

Abandoned Structure Removal

CAL EPA SITE VISIT SWRCB Vice-Chair Steven Moore DELTA WATERMASTER BRIEFING Michael George

91 siphon diversions Analyzing 13 meter types SWRCB approved research & compliance plan Coordinating with Delta Watermaster Consortium Performance reports submitted 2018 & 2019 Proposed implementation plan submitted Dec. 2019

Real Property & Asset Management Item #6a February 11, 2020 30

Bouldin Island –Water Intake Siphons

SB 88 –Water Metering

Part of broader outreach

• n SWP, Delta, agriculture

Share info with inspection trips, key stakeholders, media, ag interests

Real Property & Asset Management Item #6a February 11, 2020 31

Outreach

www.mwdh2o.com/deltaislands

Potato Slough

Snow & Speckled Geese, Ducks –Bouldin Island White Swans –Bacon Island

Audubon Society Annual Shorebird Survey The Nature Conservancy Sandhill Crane Surveys Ducks Unlimited & Others Public Lands Partnership Delta Stewardship Council, UCLA, Lawrence Berkeley Lab Seismic Levee Analysis UC Davis, USGS Louisiana Floating Marsh Biochemistry Interagency Telemetry Advisory Group Fish Tracking Delta Protection Commission Stakeholder Advisory Group

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Audubon Society Shorebird Survey

Andrew Meyers, US Navy Commander, RET

Real Property & Asset Management Item #6a February 11, 2020

Collaboration Efforts

Real Property & Asset Management Item #6a February 11, 2020 33

Overview / Board Policies Strategic Assessments Management Actions Next Steps

Real Property & Asset Management Item #6a February 11, 2020 34

Bouldin Island

Final water diversion metering implementation Continue coordinating with DWR on Delta Conveyance Continue implementing in- Delta conveyance pathway improvements Begin pilot carbon capture & subsidence reversal projects Local & regional outreach Board updates

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In-Delta Freshwater Pathway

WEBB TRACT HOLLAND TRACT CHIPPS ISL. TULE RED

Brannan Island Twitchell Island Bethel Island Sherman Island Bradford Island Jersey Island Hotchkiss Tract

Franks Tract

Palm Tract

Decker Island

Veale Tract

Oakley Antioch

Van Sickle Island

Jones Tract

Big Break

Andrus Island

Terminous Tract

TyIer Island

Pittsburg

Winter Island Browns Island Sherman Lake

Empire Tract

West Isl. Kimball Isl.

Grizzly Bay

West Sherman Island

Rio Vista

Spinner Island Mallard Isl.

Medford Island Quimby Island

Little Mandeville Island

Mildred Island

MacDonald Island

Orwood Tract

Brentwood

Byran Tract Union Island

Ryer Island

Honker Bay Simmons Island

BACON ISLAND BOULDIN ISLAND

Venice Island Staten Island Mandeville Island Woodward Island Victoria Island

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