tujunga spreading grounds enhancement project · 2019. 9. 27. · project overview basins...

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TUJUNGA SPREADING

GROUNDS ENHANCEMENT

PROJECT

Southern California Water Coalition’s

Stormwater Workshop

September 27, 2019

Multi-Agency Collaboration to Achieve Co-Benefits and Cost Sharing

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AGENDA

• Project Objective

• Partnerships

• Project Location

• Project Overview

• Multi-Benefits

• Cost Sharing

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PROJECT OBJECTIVE

Including capture 150,000 acre-ft/year of stormwaterIncluding capture 150,000

AFY of stormwater

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MULTI-AGENCY PARTNERSHIPS

LADWP

Water Resources Division

Watershed Mangement

LA County Flood Control DistrictDesign, Construction

Management & Inspection

Basins

W.A. Rasic Inc.

Intakes

Los Angeles Engineering Inc.

Open Space Enhancement

TBD

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PROJECT LOCATION

Tujunga SG)

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PROJECT OVERVIEW

Basins (Completed)

Consolidate 20 existing basins into 9 larger and deeper basins

Intakes (Nov 2019 completion)

2 new intakes and rubber dams

Open Space (Dec 2020 completion)

Improve perimeter fencing, recreational space and landscaping

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PHASE 1- BASIN ENHANCEMENTS

7

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CONVEYOR BELT SYSTEM

Disposal site

Tujunga Spreading Grounds

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CONVEYOR BELT SYSTEM

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PHASE 2 – INTAKE IMPROVEMENTS

New Intake No. 2

New Intake No. 1

Existing Intake

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PHASE 2 – INTAKE IMPROVEMENTS

Tujunga SG)

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PHASE 2 – INTAKE IMPROVEMENTS

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PHASE 2 – INTAKE IMPROVEMENTS

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PHASE 3 - OPEN SPACE ENHANCEMENTS

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MULTI-BENEFITS

Improve

Downstream

Water

Quality

Open Space

Recreation

Improve

Communities

Increase

Stormwater

Capture and Water

Supply Reliability

Promote Economic

GrowthFlood control by

attenuating peak

flow

Supply water to 48,000 homes per yr

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COST SHARING

LADWP $52 M

Total Budget ~ $52 Million

~$130/AF of water

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COST SHARING

District$6.3 M

LADWP $47.5 M

Total Budget ~ $52 Million

~$114/AF of water

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COST SHARINGProp 84 Grant$3.2 M

Prop 1 Grant $7M

District$6.3 M

LADWP $35.3 M

Total Budget ~ $52 Million

~$85/AF of water

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Thank you

Art Castro, PEManager, Watershed Management

Los Angeles Department of Water & Power