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What’s Being Protected? A little more about the Santa Ana River and Brine
Line Storm Response
Pre-Planning – Emergency Response Plans, Training
The Event Storm Impacts and Follow-On Actions – repairs,
lessons learned
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“Tee” Levees in Orange County
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Major Dischargers 6 Brackish Groundwater Desalters (50 MGD of potable
water) 3 Power Plants (2000 MW; ~1.5 M Homes) 2 State Prisons (10,000 inmates) Various Industries Hauled Brine Wastewater (4 stations, 60 trucks/day)
Economy of Inland Empire - over $1B, 4,000 jobs
Water Quality of Santa Ana River, OC Beaches
OCSD Treatment Plants
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Pre-Planning Emergency Response Plan – OCSD, SAWPA,
Corps Annual plan update, meeting, training in fall “Just-in Time” Training
The Event Lots of rain in short period of time resulting
in high river flow and volume Twice daily coordination: Corps, OCSD,
SAWPA, OCWD, OC PW, RCFC
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Top of Embankment
Conservation Pool 505’
543’
Spillway Elevation (188k AF)
594.4’
Inspection/Repair 100cfs
5,000cfs 3,000cfs
Debris Pool 498’
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SAVI Ranch
Gypsum
Canyon
Coa
l Can
yon
91
241
Green R
iver Golf
Course
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Grade Stabilizer at Green River Golf Course
Grade Stabilizer at SAVI Ranch
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1/13/11 topographic survey over pipe 3 locations within floodplain - Orange County Two “scour pockets” over pipe found
SAVI Ranch Grade Stabilizer Green River Golf Course Grade Stabilizer
Coal Canyon – minor erosion, debris accumulation Work ongoing, OCSD contractor
Emergency rock placement, debris removal 1/20 - 25/11
Cost unknown at this time FEMA reimbursement will be requested by OCSD
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Reach IV
Aliso Creek
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Lateral to CA Rehabilitation Center
Auburndale Street Looking South
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Euclid Ave. Looking North
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Reach V Temescal Canyon RD near Trilogy RD
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SAR is operated as an integrated system Team approach to response – lots of coordination Existing relationships key to success Ongoing joint activities, projects
Emergency Response Plan Good overall plan. Some fine tuning required. “Just-in-time” training for key participants was invaluable.
Prado Dam Water Surface at Record Elevation (529.4 ft) Water-tightness of the pipe, MASs confirmed. Seals at several MASs to be evaluated for improvement
especially at the higher water surface elevation.
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Brine Line in Orange County Coordination team established: Corps, OCPW, OCSD,
OCWD, RCFCD, SAWPA created Effectively communicated issues and identified solutions. Result: reduction in dam outflow from 5,000 cfs to 2,500
cfs for 4 days and a reduction to 100 cfs to facilitate inspection/repair.
Group should be formalized in the agencies’ emergency response documents.
Areas of erosion over pipe, around MAS Traditional trouble spots remain. New locations identified. Erosion locations need to be evaluated for protection
measures to prevent or reduce future erosion.
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QUESTIONS