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Armour Ranch Road Bridge Emergency Repairs SB County Project Number 01STRM R015

Armour Ranch Road Bridge Emergency Repairs SB County Project Number 01STRM R015. Storm Damage caused during March 5 th 2001 storm. Damage Description. Scour hole discovered behind grouted rip rap bridge abutment protection. Scour hole caused by inadequate scour protection.

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Armour Ranch Road Bridge Emergency Repairs SB County Project Number 01STRM R015

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  1. Armour Ranch Road Bridge Emergency Repairs SB County Project Number 01STRM R015 • Storm Damage caused during March 5th 2001 storm.

  2. Damage Description • Scour hole discovered behind grouted rip rap bridge abutment protection. • Scour hole caused by inadequate scour protection.

  3. Inspection on 10/24/01 revealed dangerous situation prompting need for immediate action. Section View

  4. Construction Began 10/29/2001 • Breakup existing Rock Riprap over scour hole.

  5. Exposed Bridge Piles

  6. REPAIRS • Remove undermined Rock riprap • Grout behind bridge piles • Fill void with rock and concrete

  7. Scour Protection Toe Extension • Extend toe 5 feet below existing depth.

  8. Scour protection toe extension required to prevent future losses due to scour during storm events. Plan View

  9. Filling toe trench.

  10. Placing rock in trench.

  11. Placing concrete in rock filled toe trench.

  12. New and improved rock riprap bridge pile scour protection.

  13. Finished Construction 11/7/2001.

  14. Project Funding • Office of Emergency Services • $20,770 budgeted • Actual Construction Cost = $93,542

  15. The End

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