1. LST La Moure County

2. Lavata Bay (village of Cifuncho)

3. Background Conducting large scale joint exercise Grounded on rocks during landing exercise 0530 on 12 September - Lavata Bay Damaged 18 tanks/areas in forward section of vessel Carrying diesel, mo-gas and JP5 in damaged areas (total on board - 530K gallons) Initial estimates 40K gallons of product lost (later revised to 160K gallons)

4. NOAA’s Mission Assist Navy SupSalv in determining threat, clean-up/protection strategies and equipment needs –Physical oeanography to calibrate model and assess potential movement of lost product –Shoreline surveys to assess cleanup requirements and protection potential

6. What We Knew-Oceanography Model set up with –1. Humboldt (Peru) current (northward) –2. Shelf Current (southward) –3. Tidal Currents –4. Coastal flow (northward)

7. What We Learned-Oceanography Upwelling confirmed (XBT and visual obs) Tidal Current excursion of < 2 miles, times relative to Taltal reasonable assumption (dye studies at two stages of tide, three overflights mapping oil distribution) Local influence of winds (observed from both LST La Moure County and the Destroyer Hayler)

10. What We Provided Model set-up with hindcast confirmed by Chilean CG/Navy and on-scene obs Statistical analysis for potential loss over the next two months Click here for hindcast!

11. What We Knew - Resources/Shoreline Species expected in the area –Shellfish, pinnepeds, birds, and finfish Shoreline types –Medium to coarse grain sand beaches –Rocky headlands

12. What We Learned - Resources/Shoreline Fishing village of Cifuncho had ceased fishing in the Bay Lavata bay rich in intertidal marine life Shoreline surveys indicated no residual sheen on shorelines outside of immediate impact area - considerable impact in grounding area Conducted survey of area of concern south of Bay with Chilean contract scientist

14. Areas surveyed - x’s mark vessel locations

19. What We Provided Summary of shoreline surveys Advice that no shoreline cleanup was recommended Booming strategies to protect shorelines from further impact in event of catastrophic release

24. Summary Sheens mostly stayed within small bay Acute impacts noted in immediate area Shoreline cleanup not required/feasible Shoreline protection difficult; use open- water protection if possible Joint work with Chileans fostered credibility As of Oct. 1 most of oil has been offloaded onto two 136,000 gallon dracones Disposal of vessel unknown