Devil's Gate Reservoir Restoration Project

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PROJECT DESCRIPTION

The Devil's Gate Reservoir Restoration Project is a four-year effort to increase flood protection for communities downstream of Devil's Gate Dam and restore habitat within a popular section of the Arroyo Seco Watershed.

Los Angeles County Public Works will remove 1.7 million cubic yards of sediment from the reservoir immediately behind the nearly 100-year-old dam. In addition to providing flood relief to communities that have endured nearly a decade of elevated flood risk along the Arroyo Seco, the project will establish a permanent stormwater maintenance area that allows for the creation of 70 acres of enhanced habitat and recreational opportunities for local communities.

Update: 8/27/20

Notice: "Second season" hauling moves to Irwindale

Hauling activities for the 2020 season commenced at Devil’s Gate Reservoir on June 4. Since that date, all material has been delivered to Sheldon Pit in the Sun Valley area while Manning Pit in the City of Irwindale was prepared for use. We are anticipating the start of sediment hauling to Manning Pit to tentatively begin on Tuesday, September 1. Hauling is expected to continue through November. Hauling operation hours in the Irwindale area are approximately 7:30 a.m. through 4:30 p.m., Monday through Friday. There will be no hauling associated with our project on weekends.

Haul route map can be found here. Please note the route in and out of the site was modified from last season. Public Works is partnering with the South Coast Air Quality Management District to closely monitor the streets to ensure that dust is controlled. We encourage community members to contact us immediately if they observe dust or have any other concerns regarding the hauling operation. Please contact us at (626) 458-2507 or the South Coast Air Quality Management District hotline at (800) CUT-SMOG.

Update: 8/12/20

Notice: Change of Haul Routes to Start August 17, 2020

Beginning Monday, August 17, LA County Public Works will transition to the In-School haul route at Devil’s Gate Reservoir. That hauling route can be found here.

Although we understand schools are starting the year with off-site distance learning, we want to ensure that our hauling does not impact school transitioning schedules at such time as in-person schooling might resume. Also, by continuing with the same hauling pattern as in the previous year, we are maintaining the commitment to balance the truck traffic between the communities of Pasadena and Altadena on the east side of the reservoir and La Cañada Flintridge on the west side.

For more information on the full range of enhancements at Devil’s Gate Reservoir, visit the website at DevilsGateProject.com. You can also ask questions or share your concerns at devilsgateproject@pw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.

Update: 6/2/20

Notice: UPDATED: Sediment Removal to Start June 4, 2020

LA County Public Works will resume sediment removal at Devil’s Gate Reservoir on Thursday, June 4, and continue its operations through November. Hauling hours are from 7 a.m. to 3:30 p.m., Monday through Friday.

LA County Public Works listened to and worked with community leaders and implemented mitigations to further contain and reduce fugitive dust emissions from entering communities surrounding Devil’s Gate Reservoir. We will continue to take the following steps to keep neighborhood streets clean:
  • Pre-watering sediment prior to the loading of the trucks
  • Watering all loaded trucks before they leave the reservoir to control material from blowing out of truck beds
  • Street sweepers continuously sweeping paved surfaces, including the truck access ramp and the local sediment haul route
  • Maintaining tire wash stations to remove dirt from tires and undercarriages of trucks
In addition, LA County Public Works performed the following improvements in the off-season surrounding Devil’s Gate Reservoir to address community concerns:
  • Pavement treatment for local haul routes.
  • Traffic signal improvements at major intersections along the sediment removal route to add dedicated left turn arrows for more efficient traffic flow and increased safety

This year, improvements to air quality monitoring systems are in place and LA County Public Works is pleased to announce the launch of a new real-time air monitoring website. We welcome feedback and are committed to making improvements to allow community members to make more informed decisions.

For more information on the full range of enhancements at Devil’s Gate Reservoir, visit the website at DevilsGateProject.com. You can also ask questions or share your concerns at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.

Update: 5/28/20

Notice: Sediment Removal to Start June 3

LA County Public Works will resume sediment removal at Devil’s Gate Reservoir on June 3rd and continue these operations through November.

Public Works is dedicated to a community-first approach and has adopted numerous measures to keep communities safe, neighborhood streets clean and traffic impacts to a minimum. In the first year of its reservoir restoration project, the project team successfully removed more than 445,000 cubic yards of sediment—26% of its overall project goal.

To protect hikers, cyclists and workers during construction, a number of trails within the reservoir, including the tunnel to the Lower Arroyo Seco Trail, will be closed, Monday through Friday, from 6:45 am - 4 pm. The Rose Bowl Loop and recreational trails within Hahamongna Park and along the north side of the reservoir will remain open to visitors. Please refer to the trail closure map for details.

For more information on the full range of enhancements at Devil’s Gate Reservoir, visit the website at DevilsGateProject.com. You can also ask questions or share your concerns at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.

Sediment Removal Trail Closures

Update: 5/20/20

Notice: Hiring Local & Targeted Workers

Los Angeles County Public Works is looking to hire truck operators this spring from Altadena, Pasadena and neighboring communities to work on the Devil’s Gate Reservoir Restoration Project.

During the COVID-19 health and economic crisis, LA County Public Works is recruiting nearly a third of its project workforce from local community members, as well as others who are experiencing eligible hardships. LA County Public Works is committed to the delivery of uninterrupted essential services to the public. For more information on this exciting opportunity, see the job flyer and presentation found here.

Update: 5/18/20

Notice: Construction to Resume This Week at Devil's Gate Reservoir

Work on the Devil’s Gate Reservoir Restoration Project will resume as early as Wednesday, May 20, with the mobilization of construction equipment and work within the reservoir. Sediment removal activities are anticipated to begin the week of Monday, June 8. A separate email to community members and other project stakeholders will be sent prior to the start of sediment hauling.

LA County Public Works is working closely with the California Department of Fish and Wildlife to protect and preserve native habitat and wildlife, with biologists on-site daily to monitor construction activities.

For more information, please visit the project website at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.

Update: 4/22/20

Notice: Construction to Resume at Devil's Gate Reservoir

With the close of the winter storm season, Los Angeles County Public Works is preparing to resume work on the Devil's Gate Reservoir Restoration Project. Critical infrastructure projects, like the work being done at Devil’s Gate Dam, are considered essential services by the State of California, and LA County Public Works is dedicated to a community-first approach as it moves forward in this multi-year effort.

Construction operations will resume next Monday, April 27, with the mobilization of construction equipment and materials within the reservoir. Sediment removal activities are anticipated to begin on Tuesday, May 12. A separate email will be sent prior to the start of sediment hauling to confirm the exact start date. Workers on the project site will adhere to state and local guidelines regarding COVID-19.

For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.

Update: 4/20/20

Notice: Construction Activities to Resume at Devil’s Gate Reservoir

Los Angeles County Public Works is preparing for its second year of work on the Devil’s Gate Reservoir Restoration Project. Workers will be remobilizing construction equipment and preparing the site for sediment removal activities in the coming weeks. A separate notification will be provided prior to the start of sediment hauling. Sediment removal at Devil’s Gate Reservoir is necessary to provide flood relief to downstream communities that have endured nearly a decade of elevated flood risk. Habitat restoration activities continue on-site to create over 70 acres of enhanced habitat for wildlife.

For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at devilsgateproject@pw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507..

Update: 4/2/20

Notice: Weather delay to road improvements

Rain in the forecast has delayed road improvements to Oak Grove Drive and Berkshire Place. LA County Public Works has rescheduled the microsurfacing work along Oak Grove Drive and a portion of Berkshire Place in the cities of La Cañada Flintridge and Pasadena to April 13-16, with final roadway striping to be performed by April 17, weather permitting.

Working hours are from 7 am to 5 pm, and traffic may be reduced to one lane in each direction during construction. Call the project hotline at (626) 458-2507 with any questions or visit the project website at devilsgateproject.com.

The project team thanks you for your patience.

Update: 3/27/20

Notice: Road improvements coming to Oak Grove Drive and Berkshire Place

To protect and preserve the local roads used by haul trucks during the Devil’s Gate Reservoir Restoration Project, LA County Public Works will perform microsurfacing work along Oak Grove Drive and a portion of Berkshire Place in the cities of La Cañada Flintridge and Pasadena.

Microsurfacing is a paving operation that is similar to slurry seal. The process consists of the application of a mixture of water, asphalt emulsion, aggregate (very small crushed rock), and chemical additives to an existing asphalt concrete pavement surface. The application hardens quickly and can be used when conditions would not allow slurry seal to be successfully placed. Streets with substantial shade or a relatively high volume of traffic are good candidates for microsurfacing.

New striping will be installed along treated road segments with additional signage and pavement markings added for improved safety for all roadway users. Work will be performed April 6-10, during the La Cañada Unified School District Spring Break, with final roadway striping performed by April 11.

Working hours are from 7 am to 5 pm, and traffic may be reduced to one lane in each direction during construction. Call the project hotline at (626) 458-2507 with any questions or visit the project website at devilsgateproject.com.

Update: 1/23/20

Notice: Upcoming traffic signal improvements at Oak Grove Drive and Berkshire Place

LA County Public Works is dedicated to being a good neighbor and taking a community-first approach in its implementation of the Devil’s Gate Reservoir Restoration Project.

To enhance safety and improve traffic flow around the project site, traffic signal improvements will be performed at the intersection of Oak Grove Drive and Berkshire Place. Work includes upgrading the traffic signal to include a dedicated left turn arrow for traffic traveling northbound on Oak Grove Drive and turning westbound onto Berkshire Place. Work will begin as early as Monday, January 27, and last approximately seven weeks. Working hours are from 6 am – 2:30 pm to accommodate school pick up. Traffic may be reduced to one lane in each direction during working hours.

The project team thanks you for your patience.

Update: 11/15/19

Notice: Hauling has finished for the 2019 season and will resume in Spring 2020

LA County Public Works has completed its first year of sediment removal from Devil's Gate Reservoir and hauling operations have finished for the 2019 season. Sediment removal and hauling will resume in Spring 2020. Construction activities will continue onsite within the Reservoir through the end of November as the Contractor removes all of their equipment and prepares the Project site for the upcoming storm season.

Public Works appreciates everyone's support and cooperation throughout the sediment removal process. Your support truly made a difference to help protect residents and businesses downstream from potential flooding this storm season. We look forward to continuing to build relationships with the community as the Project progresses. Public Works wishes you and your families a wonderful holiday season!

The project team thanks you for your patience.

Update: 11/1/19

Notice: No Hauling this Friday, November 1, 2019

LA County Public Works appreciates the community’s patience with the Devil’s Gate Reservoir Restoration Project. There will be no hauling operations tomorrow, November 1, 2019. Hauling operations are anticipated to resume Monday, November 4.

The project team thanks you for your patience.

Update: 10/28/19

Notice: Notice: No Hauling this Monday, October 28, 2019 through Thursday, October 31, 2019

The National Weather Service has issued a Red Flag Warning for this Wednesday and Thursday due to gusty winds and very low humidity. A Red Flag Warning means that critical fire weather conditions are expected. There will be no hauling operations on Monday, October 28 through Thursday, October 31. Hauling operations are anticipated to resume on Friday, November 1.

The project team thanks you for your patience.

Update: 10/23/19

Notice: No Hauling this Thursday, October 24, 2019 and Friday, October 25, 2019

The National Weather Service has issued a Red Flag Warning for this Thursday and Friday due to gusty winds and very low humidity. A Red Flag Warning means that critical fire weather conditions are expected. Therefore, there will be no hauling operations on Thursday, October 24 and Friday, October 25. Hauling operations will resume Monday, October 28.

The project team thanks you for your patience.

Update: 10/9/19

Notice: No Hauling this Thursday, October 10, 2019 or Friday, October 11, 2019

The National Weather Service has issued a Red Flag Warning for this Thursday and Friday due to gusty winds and very low humidity. A Red Flag Warning means that critical fire weather conditions are expected. Therefore, there will be no hauling operations on Thursday, October 10 or Friday, October 11. Hauling operations will resume Monday, October 14.

The project team thanks you for your patience.

Update: 9/30/19

Notice: Hauling to resume Monday, September 30, 2019

LA County Public Works is dedicated to being a good neighbor and taking a community-first approach in its implementation of the Devil’s Gate Reservoir Restoration Project.

Due to dust and mud that was observed on the tires of trucks leaving the reservoir, Public Works took the proactive step of suspending hauling operations on September 5. To address these issues, a comprehensive plan was developed and implemented, which includes adding a second tire wash and other measures to significantly reduce the dust being tracked onto streets.

Hauling operations will resume Monday, September 30. Starting Monday, sediment will be hauled to Vulcan Materials Company’s Sheldon Pit in Sun Valley. Public Works will partner with the South Coast Air Quality Management District to closely monitor the streets to ensure all dust issues have been resolved.

We encourage community members to contact us immediately if they observe dust or have any other concerns regarding the hauling operation. Please contact us at (626) 458-2507 or the South Coast Air Quality Management District hotline at (800) CUT-SMOG.

The project team thanks you for your patience.

Update: 9/25/19

Notice: Public Works studies benefits of tarped haul trucks

LA County Public Works is dedicated to being a good neighbor and taking a community-first approach in its implementation of the Devil’s Gate Reservoir Restoration Project.

To determine the effectiveness of tarping all loaded haul trucks, Public Works initiated a pilot program that began August 19, 2019, in which both tarped and non-tarped trucks were followed and dust levels monitored and recorded. Results of the Tarping Pilot Program are available on the project website: Tarping Pilot Program Results.

Update: 9/12/19

Notice: Public Works studies benefits of tarped haul trucks

LA County Public Works is dedicated to being a good neighbor and taking a community-first approach in its implementation of the Devil’s Gate Reservoir Restoration Project.

To determine the effectiveness of tarping all loaded haul trucks, Public Works initiated a pilot program that began August 19, 2019, in which both tarped and non-tarped trucks were followed and dust levels monitored and recorded. Results of the Tarping Pilot Program are available on the project website: Tarping Pilot Program Results.

Update: 9/5/19

Notice: Hauling temporarily suspended due to ongoing dust issues

LA County Public Works is dedicated to being a good neighbor and taking a community-first approach in its implementation of the Devil’s Gate Reservoir Restoration Project. Although additional measures have been put in place to address dust and other issues, project managers are still observing dust on the tires of trucks exiting the work site. We are, therefore, suspending operations temporarily until a comprehensive plan to address dust has been developed and implemented.

The project team thanks you for your patience during this process.

Update: 8/29/19

Notice: No hauling this Friday, August 30, 2019 or next Monday, September 2, 2019

LA County Public Works appreciates the community’s patience with the Devil’s Gate Reservoir Restoration Project. In an effort to reduce traffic impacts leading into the holiday weekend, there will be no hauling operations on Friday, August 30 or Monday, September 2. Enjoy your long holiday weekend!

Update: 8/26/19

Notice: No hauling today, August 26, 2019, due to Brush Fire near the 134/2 Freeways

A brush fire broke out late Sunday afternoon in the Eagle Rock area resulting in a closure of portions of the 134 and 2 Freeways. As of 8 p.m. Sunday evening, spread of the fire was stopped in all directions with the size held to approximately 30 acres and containment at 25%. Due to the late start of the fire, unknown additional impacts, and the close proximity to the Devil’s Gate Reservoir Restoration Project site, LA County Public Works has determined there will be no hauling today, Monday, August 26, 2019. Public Works will continue to evaluate the status of the brush fire to determine when it is safe for hauling operations to resume.

For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 8/15/19

Notice: Temporary change to haul routes today due to signal outage at Oak Grove Dr. and Berkshire Pl.

At approximately 8:45 a.m. this morning, a power outage unrelated to the project caused the traffic signal at Oak Grove Drive and Berkshire Place to go out. Public Works notified the appropriate parties. Following the newly revised haul route schedule, effective today, haul trucks would have started traveling to Berkshire Place to get onto the 210 Freeway at 9 a.m. However, in an abundance of caution due to the signal at that intersection being non-operational, haul trucks continued to travel to Windsor Avenue for a short period of time until the signal at Berkshire Place was back up and confirmed to be operational. The haul trucks then switched to follow the approved route towards Berkshire Place.

For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 8/12/19

Notice: Tire wash installation begins today, August 12, 2019

Los Angeles County Public Works has started working today, August 12, 2019, on the installation of a tire wash at the haul truck exit of the Devil’s Gate Reservoir Restoration Project. This work, which has been approved by the City of Pasadena, includes constructing a temporary asphalt pavement extending from the newly constructed west access road to allow for the installation of a tire wash on a flat surface.

Utilizing a tire wash system at this location will remove dirt from the haul trucks’ tires and undercarriages before the trucks exit the project site, greatly reducing the amount of dirt tracked onto public roadways. After the haul trucks go through the tire wash, there will be a paved surface to allow the tires to dry before exiting the project site onto Oak Grove Drive. Implementing this additional measure in parallel with the other dust mitigation measures already employed on the project site will:

  • Reduce or eliminate the amount of visible dust tracked onto the roadway.
  • Further reduce the amount of airborne particulate matter from Project activities.
  • Reduce the utilization of a water truck on the roadway.
  • Reduce the frequency of street sweeping necessary, thereby extending the life of the existing pavement.
  • Conserve water by utilizing recirculated water inside the tire wash system.

For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 8/7/19

Notice: New haul route schedule begins Thursday, August 15, 2019.

Beginning Thursday, August 15, LA County Public Works will transition to the newly adjusted In-School haul route:

  • From 7 a.m. – 9 a.m., all haul trucks accessing the Project Site will exit the I-210 Freeway using Arroyo Blvd./Windsor Ave., turn left onto Oak Grove Dr. and enter the Project Site. All trucks hauling sediment away from the Project Site will travel on Oak Grove Dr. back to Windsor Ave. to enter the I-210 Freeway either eastbound to Irwindale or westbound to Sun Valley.
  • From 9 a.m. – 2:30 p.m., all trucks accessing the Project Site will exit the I-210 Freeway using Arroyo Blvd./Windsor Ave., turn left onto Oak Grove Dr. and enter the Project Site. All trucks hauling sediment away from the Project Site will turn right onto Oak Grove Dr. to Berkshire Pl. to enter the I-210 Freeway either eastbound to Irwindale or westbound to Sun Valley.
  • From 2:30 p.m. – 3:30 p.m., all haul trucks will follow the same route as the 7 a.m. – 9 a.m. period, exiting and entering the I-210 Freeway using Arroyo Blvd./Windsor Ave.

The In-School haul route avoids school traffic in the morning during drop-offs and in the afternoon during pick-ups. Together, the In-School and Summer haul routes balance truck traffic between the communities of Pasadena and Altadena on the east side of the reservoir and La Cañada Flintridge on the west side. An overview of the haul routes is shown in a video on the project website here. For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 6/6/19

Notice: Summer haul route begins Thursday June 6, 2019 and ends mid-August.

Beginning Thursday, June 6, LA County Public Works will transition to the Summer haul route with all haul trucks accessing the I-210 Freeway using Berkshire Place/Oak Grove Drive in La Cañada Flintridge. The Summer haul route will balance truck traffic between the communities of Pasadena and Altadena on the east side of the reservoir and La Cañada Flintridge on the west side. For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 5/24/19

Week 1 Update

Public Works began sediment removal at Devil’s Gate Reservoir on Tuesday May 21, 2019 with the goal of establishing a community-first construction plan that limits truck impacts, monitors air quality and engages community stakeholders.

To date, up to 63 trucks have made over 1,000 trips, removing more than 12,500 cubic yards of sediment.

South Coast Air Quality Management District inspectors have been on-site and results from the six air quality monitors have been good. The air quality reports are available for public review at Devilsgateproject.com.

Representatives from the cities of La Cañada, Pasadena and the community of Altadena have been monitoring the project site and are providing feedback on issues concerning fugitive dust. Public Works is monitoring and addressing fugitive dust and has added additional street sweepers and water trucks.

Public Works also plans to host a series of "check in" meetings with cities, schools, and community organizations next week to recap the first week of operations and address any concerns.

For more information, please visit the project website at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 5/20/19

Notice: Sediment removal at Devil’s Gate Reservoir to begin on Tuesday, May 21, 2019, weather permitting.

Weather forecasts predict light rainfall tomorrow that should not impact operations. LA County Public Works will continue to monitor the weather and provide updates as they become available. For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at devilsgateproject@dpw.lacounty.gov or call the Devil’s Gate Hotline at (626) 458-2507.

Update: 5/19/19

Due to an updated weather forecast predicting rain throughout Sunday evening, the start of hauling for the Devil’s Gate Reservoir Restoration Project has been postponed until at least Tuesday morning. LA County Public Works will continue to monitor the weather and provide updates as they become available.

UPDATE: 5/17/19

Notice: Sediment removal at Devil’s Gate Reservoir to begin on Monday, May 20, 2019, weather permitting.

Los Angeles County Public Works has been actively planning for a more sustainable Devil's Gate Reservoir. To achieve balance between restoring flood protection to downstream communities and preserving the natural resources of the Hahamongna Watershed, Public Works will remove 1.7 million cubic yards of sediment over 4 years from the reservoir behind Devil’s Gate Dam. In addition to providing flood relief to downstream communities that have endured nearly a decade of elevated flood risk, the restoration project will create over 70 acres of enhanced habitat for wildlife.

Public Works is currently working with the South Coast Air Quality Management District (AQMD) and the California Air Resources Board (CARB) on installing air quality monitors around the project site; all air quality monitors will be installed and operational before trucking activity begins. Additionally, trucks used to haul sediment are undergoing tests and results show trucking activity will contribute less than 0.6% of daily local NOx emissions, 0.2% of daily local PM10 emissions, and 0.4% of daily local PM2.5 emissions. Public Works also recently retested the sediment in the reservoir and found it was non-hazardous and had no traces of Glyphosate (Roundup).

For more information on the project, please visit the project website at DevilsGateProject.com, email Public Works at devilsgateproject@pw.lacounty.gov or call the Devil’s Gate Project Hotline at (626) 458-2507.

Update: 5/15/19

Los Angeles County Public Works is working to provide the community with the most current and accurate information as it becomes available. A number of new documents have been recently uploaded onto the project website ( devilsgateproject.com ), under Resources. Many of these are living documents, and will be updated as more information becomes available and the project progresses. We encourage the community to explore the project website and resources available and let us know if you have any comments or questions.

Update: 2/20/19

Storm Debris Removal at Devils Gate Reservoir

MAINTENANCE ACTIVITY

Los Angeles County Public Works is removing recent storm debris from Devils Gate Reservoir. This is routine facility maintenance and not part of the Devils Gate Reservoir Restoration Project. The debris removal is necessary to safeguard downstream communities by maintaining operability of Devils Gate Dam and maximize storage capacity in the reservoir. Once removed, this debris will be transported to Scholl Canyon Landfill in the City of Glendale.

Storm Debris Removal at Devils Gate Reservoir

DATE/TIME

County crews will begin hauling on Wednesday, February 20, 2019. Hauling operations will be limited to 7:00 a.m. to 3:30 p.m., Monday through Friday, for approximately 2 weeks. Additional debris removal work inside the reservoir may take place on weekends.

RESIDENT SUPPORT

LA County appreciates your patience and understanding during storm season. If you have questions about maintenance activities or would like to report a concern, contact Public Works Dispatch at (800) 675-HELP (4357).

Update: 11/26/18

Los Angeles County Public Works has been actively planning for a more sustainable Devil's Gate Reservoir. In an effort to achieve balance between restoring flood protection to downstream communities and preserving the natural resources of the Hahamongna Watershed, Public Works will remove 1.7 million cubic yards of sediment over 4 years from the reservoir behind Devil’s Gate Dam. In addition to providing flood relief to downstream communities that have endured nearly a decade of elevated flood risk, the restoration project will create over 70 acres of enhanced habitat for wildlife.

Habitat restoration activities have already started on the perimeter of the reservoir with the removal of non-native and invasive plant species within the Habitat Restoration Areas. In an effort to minimize the impact to the community, LA County Public Works in coordination with the Contractor, Griffith Company, are waiting to start initial construction activities until after the Thanksgiving holiday. Initial construction activities include vegetation removal from within the sediment excavation footprint and access road construction, with the sediment removal and hauling starting in April 2019. Starting the week of November 26, 2018, you will see equipment on-site and construction activities beginning, trails will be temporarily closed during weekdays, but open on the weekends. For more information you can view the Project Fact Sheet here.

Update: 10/9/18

LA County Public Works is prepared to start work on the Devil's Gate Reservoir Restoration Project within the upcoming month. The first phase of the Project involves the restoration of over 70 acres of invasive vegetation with native habitat.

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