The City of Monrovia has coordinated with the Los Angeles County Department of Public Works to conduct a post-Madison Fire assessment of the burn area, specifically to address any outstanding safety issues to residential properties.
Los Angeles County Public Works met with homeowners individually to address issues located on private property. An evaluation was made of potential magnitude of mudflow in the area which can occur during any moderate to severe rainstorms over a five year period.
Highland Place Debris Basin
LA County Public Works constructed a debris basin at the top of Highland Place to address mudflow concerns as a result of the assessment to control and manage mud and debris flow. The planning and development of the rainstorm mitigation efforts was a partnership with the City of Monrovia and the LA County Department of Public Works.
The wall is located above the Highland Place cul-de-sac entirely on the City property in the area of the access road. The timber rail wall will serve as a debris dam, allowing water to flow through, but not large rock, dirt and other hillside debris. The structure is temporary and will be in place for approximately five years to allow vegetation to grow back along the hillside and mitigate the potential for damaging mudflow.
Debris Basin May Be Removed by LA County, City Assessing Option of Taking Facility Over
The structure was built by LA County, and for the past 5 years, LA County has managed and maintained the overall structure. In May 2019, an engineer from LA County contacted our Public Works team to discuss the future disposition of the debris structure. It appears that given we’ve hit the 5-year mark since the Madison Fire, LA County has given the City two options regarding the future of the debris structure, which are as follows:
- LA County will remove the structure.
- LA County will convey the structure to the City, and we will be responsible for all operating and maintenance related costs moving forward.
City staff will continue assessing the best course of action moving forward.
In addition to the construction of the debris wall at the top of Highland Place, the LA County Department of Public Works has recommended placement of K-Rail within neighborhoods surrounding the burn area. K-Rails are concrete barriers often used on freeways during construction activities that will serve as a tool to minimize flood and mudslide impacts.
|Avocado Place||Both sides of the street|
|Crescent Drive||South side of the street|
|Highland Place||Both sides of the street|
|Highland Place (N of Scenic)||East side of the street|
|Hillcrest Blvd||South side of the street|
|Heather Heights Court||Both sides of the street|
|Lotone Street||South side of the street|
The K-Rail remained in place for up to five years, or until sufficient vegetation grows back along the hillside to mitigate the potential for damaging flow.
The contact information for the Los Angeles County Engineer is:
Los Angeles County Dept. of Public Works
Watershed Resources Division
For information on the Council meeting or to address comments and/or concerns, click here, or call (626) 932-5575 or email firstname.lastname@example.org
After reaching the recommended five-year mark, the City Council approved the overall plan to remove the K-Rail at their October 2, 2018 meeting. For more details, read the full staff report here. The K-Rail was removed in two phases in October-November 2018 and May-June 2019, in coordination with Monrovia Renewal construction activities.
Based on the area of the fire (outlined in red), engineers from Los Angeles County and Monrovia Departments of Public Works recommend placing K-Rail within neighborhoods to mitigate mud flows. Areas indicated in yellow are spots where K-Rail is critical for the preservation of neighborhoods.
- Location A: Crescent, Avocado, Hillcrest
This map shows the placement of K-Rail from Crescent Drive down Avocado Place to Hillcrest Blvd. Yellow areas are critical, and K-Rail placement is delineated in the red dotted line.
- Location B: Crescent Drive
This map shows the placement of K-Rail from Crescent Drive. K-Rail placement is delineated in the red dotted line.
- Location C: Highland Place (just below and north of Scenic)
This map shows the placement of K-Rail on Highland Place, just below and north of Scenic Drive. Yellow areas are critical, and K-Rail placement is delineated in the red dotted line.
- Location D: Highland Place (below Scenic Drive) to Hillcrest
This map shows the placement of K-Rail on Highland Place, below Scenic Drive, to Hillcrest Blvd. Yellow areas are critical, and K-Rail placement is delineated in the red dotted line.
- Location E: Heather Heights, Lotone
This map shows the placement of K-Rail on Heather Heights to Lotone. Yellow areas are critical, and K-Rail placement is delineated in the red dotted line.
Supporting Documents & Links
- Madison Fire K-Rail Community Meeting Presentation (2 MB)
- Madison Fire Burned Area Report (96 KB)
- Madison Fire Burned map (6 MB)
- Madison Fire Phase map (6 MB)