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Before, During, After the Storm: The Keys to Emergency Response

Before, During, After the Storm: The Keys to Emergency Response. Outline. 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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Before, During, After the Storm: The Keys to Emergency Response

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  1. Before, During, After the Storm: The Keys to Emergency Response

  2. Outline • 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

  3. “Tee” Levees in Orange County

  4. What’s Being Protected? • 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

  5. Storm Response • 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

  6. 594.4’ Top of Embankment 543’ Spillway Elevation (188k AF) Conservation Pool 505’ 498’ Debris Pool Inspection/Repair 100cfs 5,000cfs 3,000cfs

  7. Green River Golf Course SAVI Ranch 91 Coal Canyon Gypsum Canyon 241

  8. 1/13 Site Inspection Grade Stabilizer at SAVI Ranch Grade Stabilizer at Green River Golf Course

  9. Emergency Repairs • 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

  10. Reach IV Aliso Creek

  11. Lateral to CA Rehabilitation Center Auburndale Street Looking South

  12. Euclid Ave. Looking North

  13. Reach V Temescal Canyon RD near Trilogy RD

  14. Lessons Learned • 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.

  15. Lessons Learned • 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.

  16. QUESTIONS

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