California’s Water Future:

Groundwater Management & Storage

August 31, 2017

Central Basin

West Coast

Basin

420 square miles

Population = 4 million

(over 10% of California’s population)

43 cities

Groundwater provides half

of the water supply

Spreading Grounds (percolation basins)

Alamitos

Seawater

Barrier

Dominguez Gap

Seawater Barrier

West Coast

Seawater Barrier

Collection of projects to eliminate WRD demand

for imported water

• Capture and conserve additional stormwater

• Increase use of recycled water for groundwater

replenishment

Creates locally sustainable groundwater supply

Spreading Grounds (percolation basins)

Rio HondoSpreading Grounds

San Gabriel River Spreading Grounds

L.A. County Replenishment Facilities

What is GRIP?

21,000 AFRecycled Water

Status Quo

21,000 AFImported Water

50,000 AFRecycled Water

(tertiary)

54,000 AFStormwater Capture

50,000 AFRecycled Water

(tertiary)

54,000 AFStormwater Capture

12

5,0

00

AF

tota

l wat

er

What is GRIP?

Status Quo10,000 AF

Adv. Treated Recycled Water

11,000 AFAdd’l. Tertiary Recycled Water

21,000 AFImported Water

50,000 AFRecycled Water

(tertiary)

54,000 AFStormwater Capture

50,000 AFRecycled Water

(tertiary)

54,000 AFStormwater Capture

What is the Cost of GRIP?

Status Quo

$1,200 per AF

$375 per AF$770 per AF $768

per AF

50,000 AFRecycled Water

(tertiary)

54,000 AFStormwater Capture

50,000 AFRecycled Water

(tertiary)

54,000 AFStormwater Capture

GRIP site

(about 1 mile upstream)

San Gabriel Coasting

Spreading Grounds

1 mile

Downstream

Neighborhood across

street

Held Community Design Forum

GRIP will cost $107 million

WRD will receive over $20 million in grants and also

$80 million in a low-interest, long-term loan financing

through Prop 1

• IRWMP

• SWRCB

• RMC

Grant funding and Prop 1 SRF loan will save WRD $46

million over 30 years

GRIP Construction Progress to Date

(view from southwest corner)

Where to go from here - WIN 4 ALL

• There is 450,000 AF of unused storage space in the

Central and West Coast groundwater basins

• Much effort was put into improving the adjudications

to access that space

• Can use same approach as WIN - use local

resources and storage to increase use of

groundwater supplies and offset overall demand for

imported water

Thank You

Robb Whitaker, General Manager