Improving Water Quality in the Tijuana River Valley Project #6: Construct New Infrastructure. to Address Trash and Sediment Yogurt Overview Trash1 Sediment2 Canyon3 This project involves the construction of COST ESTIMATES infrastructure along the Tijuana River, $ 0.5M – $ 1M – Capital $ 3M Smuggler’s Gulch, and Yogurt Canyon to 4M 50M reduce sediment and trash deposition into $ 0.03M – $ 0.2M – Annual O&M4 $ 5K the Tijuana River Estuary. Trash booms and 6M 49M sediment basins adjacent to or within the $ 1M – $ 9M – main channel of the Tijuana River and 40-year lifecycle $ 3.5M 156M 1.7B Smuggler’s Gulch (U.S.- or Mexico-side) are being considered along with flood mitigation infrastructure in Yogurt Canyon. TRANSBOUNDARY TIJUANA RIVER IMPACT5 (Annual Benefit) Project at a Glance Flow day reduction ― ― ― Flow rate reduction ― ― ― Location of United States and possibly Sewage reduction6 ― ― ― Operations Mexico Entry Points Tijuana River, Cross-Border Addressed Canyons SAB CREEK IMPACT5 (Annual Benefit) Targeted Trash, Sediment Pollutant(s) Reduction in flow rate ― ― ― Sewage reduction ― ― ― Will this project increase public health BEACH CLOSURE IMPACTS5 and beach water quality? (Annual Benefit) 7 This project will reduce trash and sediment Closure reduction ― ― ― but is not expected to reduce sewage. LEGEND Does this project improve work 1 Trash: Installation of trash booms in the Tijuana River Main Channel conditions for government activities? and Smuggler’s Gulch 2 Expected improvements to U.S. Navy Sediment: Strategically placed sediment basins in the US and Mexico 3 Yogurt Canyon: Pilot channel in Yogurt canyon or modification to personnel training conditions and U.S. Border Monument Road Patrol activities are unquantifiable. 4 O&M: Operations and maintenance 5 Impacts are unquantifiable 6 Estimates of sewage reduction are based on the reduction of BOD (biochemical oxygen demand), a standard surrogate for sewage 7 Beach closure reduction estimates are based on Scripps Institution of Oceanography models NW Waves Project 6: Construct New Infrastructure to Address Trash and Sediment (Winter) Imperial Beach South Bay Water Trash and sediment Reclamation International basin Plant (SBWRP) Treatment Plant South Bay (ITP) Ocean Outfall Trash and sediment basin (evaluated on each side of border) Pump Station 1B Canyons International Collector San Antonio PB CILA de los Pump Buenos Plant Northern Current Station 1A (Summer) (SABTP) San Antonio de los Buenos (SAB) Creek.