LOS ANGELES DISTRICT

SPRINGDALE TOWN WASTEWATER LINE PROTECTION, UT The river is causing erosion on the west (right) descending bank adjacent to a sewer main alignment. Prior to 2005 the river was parallel to the sewer alignment. Flooding during the winter of 2005 caused significant damages throughout the region. During the 2005 flood event the Virgin River changed course and the river is now perpendicular to the sewer main, putting the line in risk of future damage. Approximately 10-12 feet of bank line was lost during the 2005 flood event. A load of rock was placed during that flood event as a temporary measure. The sewer main is now approximately 10 feet above the median flow line of the river and has a minimum horizontal separation of about 12 feet. Based on erosion rate from the 2005 flood event it is likely that impinging flows could jeopardize the sewer line in a future flood event. If damaged or destroyed, all of the flow will be discharged directly into the Virgin River. Based on the average daily flow rate, approximately 250,000 gallons could be discharged in one day. The river provides drinking and irrigation water for much of southwest Utah and provides habitat to several endangered fish species. The environmental and social impacts of allowing raw sewage to enter the river could be catastrophic.

REGIONAL SEDIMENT MANAGEMENT STUDY, CA Operation of the SAR project requires sediment be removed to maintain the flood capacity and function. These sediment removal actions deprive downstream beaches of sediment and reduce the infiltration and recharge capability along the river downstream of Prado Dam. This study would identify opportunities for beneficial use of dredged material that is currently being disposed of or used as construction material.

COAST OF CALIFORNIA, LOS ANGELES CO, CALIFORNIA Study is located along the coastline of Los Angeles County in southern California. The 80 mile coastline extends from Point Dume southward to the San Gabriel River. Substantial erosion of areas along the Los Angeles County shoreline has taken place in recent years. The estimated economic value of the Los Angeles County beaches exceeds $20 billion, and the continued loss of public beaches may have a significant adverse impact to the regions economy. A construction cost estimate has been made.

ARROYO SECO WATERSHED, CA The Arroyo Seco Watershed study is located within the cities of La Canada Flintridge, Pasadena, South Pasadena and Los Angeles. The study will evaluate the potential for watershed management and environmental restoration opportunities within the Arroyo Seco watershed.

SAN CLEMENTE SHORELINE, CA The study will investigate alternatives to provide shoreline protection. Construction cost estimate; $11M (NF-$4.M, F-$7.M) for the initial placement. The total project cost including all re-nourishments is estimated to be $98M for the 15 meter-width beach.

SOUTH PERRIS WATER SUPPLY DESALINATION, CA The Project will provide a reliable potable water supply, help preserve existing groundwater resources and allow the Water District to rely less on imported water sources. A separate Section 219c project will construct brine management lines to connect the Perris II Desalter to the existing brine management facilities.

San Juan Creek, South Orange County, CA The study area is located in South Orange County, CA approximately 40 miles southeast of Los Angeles and encompasses nearly 176 square miles. The study consists of the confluence of three creeks within the San Juan Creek watershed: Oso Creek, Trabuco Creek, and San Juan Creek. The purpose of the study is to examine flood control, stream bank erosion, and channel stability.

SUN VALLEY WATERSHED, CA The study will evaluate the potential for environmental restoration and flood damage reduction within the Sun Valley Watershed (a sub-watershed to the Tujunga Wash Watershed). The Sun Valley watershed feasibility study was recommended for further evaluation from the Tujunga Wash Environment Restoration 905(b) Reconnaissance report.

SAN DIEGO COUNTY SHORELINE, CALIFORNIA The study will investigate mitigation for the erosion and other impacts resulting from the construction of Camp Pendleton Harbor, Oceanside, California, as a wartime measure; and restoration of beach conditions along the affected public and private shores to the conditions that existed before the construction of Camp Pendleton Harbor.

SURFSIDE-SUNSET AND NEWPORT BEACH, CA Unstable shoreline is largely due to construction of Fed. Navigation & flood control work in Long Beach & Anaheim Bay. 1980, '81, '82, '95 & '98 storms caused severe shoreline erosion. Project has periodic beach nourishment with no time limit on Federal. Authorized by PL 870874 as recommended by HD 602. 67% Federal cost is based on 'equity'. Feeder beach at Surf.-Sunset receives approx. 1.8M cubic yds of sand every 5 years.