228194 EMERGENCY WORK The winter of 18-19 will be one for the record books. A significant amount of District staff time has been invested in emergency work that started with the Cranston Fire in July, continued with the Holy Fire in August, and culminated with the Valentine’s Day 2019 storm. Even today, the District is actively pursuing emergency projects to address the impacts of last winter. While the emergency work did not directly affect every zone, the burns, debris flows, and storm events diverted a significant amount of overall District resources to those areas. Below is a snapshot of some of these efforts. Holy Fire: The Holy Fire began Monday afternoon, August 6, 2018, in the Cleveland National Forest and quickly moved from Orange County into Riverside County. The fire burned over 35,000 acres in the mountains north and west of Lake Elsinore. The fire destroyed the plants and roots that normally hold soil in place, leaving communities at the base of the mountains at risk of storm induced mud and debris flows during the winter. The District, in collaboration with Cal Fire, U.S. Forest Service, U.S. Geological Survey, California Geological Survey, and the National HOLY FIRE AT ALVARADO ST. LAKE ELSINORE Weather Service, did a comprehensive evaluation ON AUGUST 9, 2019 of the mountainside to identify communities and public facilities at risk. Between August and October 2018, the District quickly designed and constructed multiple projects on existing land holdings including new debris basins, capacity enhancements on our existing basins, and new debris racks to keep debris from blocking storm drains and spillways. The District also designed and installed brand-new rain gauges, stream sensors, video CONSTRUCTION OF HORSETHIEF monitoring systems, and a web-based dashboard to CANYON DEBRIS RACK organize the information that allowed the District to effectively share real-time data with emergency responders and public works agencies during rain events. During the winter, our facilities within the Holy Fire burn area captured approximately 150,000 cubic yards (or 46 Olympic-sized swimming pools) of mud and debris. The debris capture and cleanout protected the communities and Lake Elsinore, however, the removal of the mud and debris took countless hours of District staff time and cost the District over $8,000,000. The efforts were recognized by the public, as well as our Board and Executive office. Several communities repeatedly expressed their appreciation for the tremendous effort to protect our residents. 1 228194 Cranston Fire Burn Area: The Cranston Fire burn occurred in late July and burned approximately 13,000 acres surrounding the communities of Idyllwild and Mountain Center. Although the District did not have any facilities or land holdings in the area, we did assist with mapping debris hazard areas, communicating risk to the community, and conducting property inspections. The first debris flow of the winter was triggered by a late August thunderstorm and gave an indication of things to come for both the Cranston and Holy Fire Burn areas. Valentine’s Day Storm: To top off an extraordinarily dangerous winter for the Holy Fire and Cranston Fire burn areas, on February 14, 2019, an atmospheric river brought extreme rainfall to multiple areas in the county. This storm alone was estimated to have caused over $100 million in damages and caused over 60,000 residents from Lake Elsinore to Palm Springs to be evacuated or ordered to shelter in place. The impact of this storm was massive. Palm Canyon Wash filled with 280,000 cubic yards of sediment (30,000 dump truck loads). Tahquitz Debris Basin in Palm Springs also filled with 40,000 cubic yards of debris. The historic San Jacinto River farmers levees near Sanderson in San Jacinto breached at several locations. Highways 79 and 218 were washed out near Idyllwild by the 200-year, 12- hour storm and shut down for months after the storm. Significant flood flows similarly impacted the Holy Fire burn area and other mountain and foothill communities. The District quickly designed plans and obtained PALM CANYON WASH FLOWING TO THE BRIM WITH regulatory permits and rights of entry to begin addressing SEDIMENT LADEN WATER these issues. The Tahquitz Debris Basin cleanout of that basin is now almost complete. Repairs to the San Jacinto River levee and Palm Canyon Wash are underway, and additional repairs to our Leach Canyon Dam have been designed and will be advertised for construction shortly. Many other facilities have also been cleared or are scheduled to be cleared ahead of this winter. The total restoration cost estimate for District facilities just the February 14th Storm is close to $20 million. The District and the County were successful in getting a Presidential Disaster Declaration for the February 14th storms, which will allow the District to recoup some of the costs from that particular storm; but until we get any reimbursements, the costs are being borne by the applicable zone funds. We should note that almost 100% of District facilities functioned without fail or problem during this storm season. The recent improvements to the Murrieta Creek Channel near Old Town Temecula very likely prevented the flooding of that community. And even the significant costs reported above mostly reflect the cost of clearing out debris from the successful capture of mud and debris by District basins and dams. Despite all the emergency work, District staff have done an admiral job of keeping our existing capital projects moving forward, however, in some zones the costs of the emergency work may end up delaying our ability to add new capital projects, particularly Zone 3. The remainder of this report provides an overview of the capital projects in this zone that the District has been working on this last year. 2 228194 Zone 7 Report to the Zone Commissioners By Jason Uhley, General Manager-Chief Engineer November 2019 Current/Recent Construction Projects Murrieta Creek Channel - Corps of Engineers (7-8-00021-01) Murrieta Creek continues to be the District's highest priority project in Zone 7. The project is divided into four phases: Phase I - channel improvements from the Front Street/Highway 79 south junction upstream to First Street (Temecula); Phase II - channel improvements from First Street upstream to Winchester Road (Temecula); Phase III - the detention basin/environmental restoration/sports park (Murrieta/Temecula); and Phase IV - channel improvements from the detention basin upstream to Vineyard Parkway (Murrieta). Phase I construction was completed in December 2004. Due to Corps funding constraints, Phase II is being constructed in multiple reaches. The contract for Phase IIA, 600 feet south of Rancho California Road to the existing Phase I just south of First Street, was awarded to OHL USA, Inc. for $16 million and was completed in 2018. This phase of the project was funded by the District through an amendment of the project cooperative agreement that allowed the District to provide "accelerated funding" to the Corps of approximately $17,100,000 in FY 2014-2015. The Corps has received additional funding of $9.9 million during FY 2018-2019. This funding will allow the Corps to: • Construct lateral drainage inlets and place fencing along the Phase IIA project. This portion of the project has been awarded to Whitehorn Construction, Inc. and was completed in August 2019. • Place top of bank landscaping and install a headwall as part of the continued project for Phase IIA. This work is anticipated to begin in November 2019. • Remove all sediment buildup within Phase I in order to bring the facility up to original lines and grades and for the development of the operation and maintenance manual for Phases I and IIA. 3 228194 Meadowview Stream Restoration (7-8-00361-60) The Meadowview Stream Restoration project was a multi-agency collaborative streambank stabilization/restoration project in the city of Temecula. The project construction was completed by the District in January 2019 for just over $385,000, and irrigation and vegetation were installed by the Community HOA thereafter. The restoration addressed existing hydromodification and erosion/sedimentation issues in the creek, and now reduces potential for sedimentation and related water quality problems downstream. The project restored approximately 1,450 feet of the creek downstream of the Calle Pina Colada / Del Rey Road intersection with native vegetation and bioengineering techniques such as laying back cut banks and adding rock riprap, compost rolls and hydroseed. 4 228194 Active District-Led Projects Wildomar MDP Lateral C Basin (7-8-00075-03) This is a District-led project to reduce flooding along Bundy Canyon Wash in the city of Wildomar. The project consists of a detention basin on a 19-acre site at the southeast corner of Bundy Canyon Road and Monte Vista Drive, as well as replacing an existing open channel along Monte Vista Drive. This project will attenuate flows from an 1,800-acre watershed which would otherwise overwhelm existing downstream facilities. Right of way for the basin site was secured in FY 2015-2016. Construction of the project is fully funded by the District in the 5-year CIP, and final plans are expected in FY 2019-2020. 5 .