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Sediment Forum Alameda Creek Watershed. Sediment & Hydraulic Challenges in the City of Livermore. December 11, 2008. Location. 30 miles of creeks and tributaries in the City of Livermore Three main creeks: Arroyo Las Positas Arroyo Mocho Arroyo Del Valle
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Sediment Forum Alameda Creek Watershed Sediment & Hydraulic Challenges in the City of Livermore December 11, 2008
Location • 30 miles of creeks and tributaries in the City of Livermore • Three main creeks: • Arroyo Las Positas • Arroyo Mocho • Arroyo Del Valle • Watershed Area of three main creeks is approx. 200 sq. miles
Sediment along the Arroyo Mocho
Arroyo Mocho at Concannon Bridge (Location #1)
Arroyo Mocho Upstream of Robertson Park (Location #1)
Arroyo Mocho at Arroyo Road (Location #2)
Arroyo Mocho at Arroyo Road (Location #2)
Arroyo Mocho at Holmes Street Bridge (Location #3)
Arroyo Mocho at Holmes Street (Location #3)
Arroyo Mocho at Holmes Street (Location #3)
Arroyo Mocho along Murrietta Boulevard (Location #4)
Arroyo Mocho Under Stanley Avenue Railroad Bridge (Location #4)
Sediment along the Arroyo Las Positas
Altamont Creek at Vasco Road (Location #6)
Altamont Creek looking toward the Garavanta Mitigation Area At Vasco Road (Location #6)
Arroyo Las Positas near Springtown Golf Course (Location #7)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas near Las Colinas Road (Location #8)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas near Las Colinas Road (Location #8)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas at Livermore Avenue (Location #9)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas at Livermore Avenue (Location #9)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas near Livermore Avenue (Location #9)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas at Livermore Avenue (Location #9)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas near Livermore Avenue (Location #9)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas near Livermore Avenue (Location #9)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas near Cayatano Creek (Location #10)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas at Cayatano Creek (Location #10)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas upstream of Isabel Avenue (Location #11)
Sediment along the Arroyo Las Positas Arroyo Las Positas looking toward Isabel Avenue/Kittyhawk Road (Location #11)
Sediment along the Arroyo Las Positas
Collier Creek By-Pass Pipes upstream of Mitigation Area near Las Positas College (Location #12)
Collier Creek Mitigation Area Across from College (Location #12)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas at Collier Creek (Location #13)
Arroyo Las Positas Upstream of Airway Blvd. (Location #13)
Arroyo Las Positas Upstream of Airway Boulevard (Location #13)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas – Las Positas Golf Course (Location #14)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas – Las Positas Golf Course (Location #14)
Sediment along the Arroyo Las Positas and Arroyo Mocho Arroyo Las Positas – Las Positas Golf Course (Location #14)
Arroyo Las Positas Upstream of Realignment (Location #15)
Arroyo Las Positas Downstream of Golf Course (Location #15)
Arroyo Las Positas Realignment Project by County of Alameda(Location #16)
Arroyo Las Positas at El Charro Road (Location #17)
Flood Control • Regional Flood Control Diversion proposed to relieve flooding and erosion downstream • Cost estimated at $170 Million Reference: Zone 7 Stream Management Master Plan
Early Proposal with Regional Phase 1 Flood Control Diversion
Regional Phase 1 to 4 Flood Control Diversion
Infrastructure Design • $80 Million savings in Regional Flood Control Costs • 12% of the regional diversion to be built as Phase I within two yearswith the El Charro Specific Plan Infrastructure