 What’s Being Protected?  A little more about the Santa Ana River and Brine Line  Storm Response  Pre-Planning – Emergency Response Plans, Training.

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Presentation transcript:

 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

“Tee” Levees in Orange County

 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

 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

Top of Embankment Conservation Pool 505’ 543’ Spillway Elevation (188k AF) 594.4’ Inspection/Repair 100cfs 5,000cfs 3,000cfs Debris Pool 498’

SAVI Ranch Gypsum Canyon Coal Canyon Green River Golf Course

Grade Stabilizer at Green River Golf Course Grade Stabilizer at SAVI Ranch

 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/ /11  Cost unknown at this time  FEMA reimbursement will be requested by OCSD

Reach IV Aliso Creek

Lateral to CA Rehabilitation Center Auburndale Street Looking South

Euclid Ave. Looking North

Reach V Temescal Canyon RD near Trilogy RD

 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.

 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.

QUESTIONS