B01_DDIR-ERFO_MP9.17.pdf

FEDERAL HIGHWAY ADMINISTRATION TITLE 23 EMERGENCY RELIEF PROGRAM

FEDERAL LANDS HIGHWAY

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 1 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

Applicant: Forest Service Sub-Applicant: Stanislaus N.F. Region District: Pacific Southwest Region

County:Tuolumne (109) Congressional District: 19 FLH Office: CFL NFLTFI/ NTTFI: Yes

Facility Name: Lumsden Road Facility #: 1N10 Mile Post: 9.17

Federal Project # ER: Financial #:

Federal Project # PR:

Facility Data Facility Type: Road Travel Way Width: 12' Surface Type: Gravel Thickness: 4" ADT: <400 Shoulder Width: 3' Shoulder type: Gravel Thickness: 4" Bridge Type: Bridge ID: Maintenance level: 3

DDIR Cost Summary

Repeat Repair Site: No Concurrent Repair: No Delivery Agency: FS Resiliency Items Included: Yes Non-Competitively Bid: Project Status:

Betterment Included: Yes AOP Required: No Explanations & Justifications:

Approvals Step Name Date Status Approver Comments Sub-applicant Supervisor Review

01/04/2024 Approved Douglass Anderson

Slope evaluation completed and least cost alternative proposed.

FHWA Regional Coordinator Review

01/04/2024 Pending Lorell Duteil

Approval Request Submitted

12/21/2023 Submitted James Duckett

DDIR revised and resubmitted for approval New documents attached: Reinforced soil slope repair justification report from geotechnical engineer; new sketch for proposed repair; updated cost estimate.

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 2 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

Damage Details Inspection Date:05/01/2023

Description and Cause of Damage:

Due to a series of heavy atmospheric river storms and extreme runoff across the state of California starting March 9th, 2023 this site sustained very heavy soil saturation and above normal rain runoff. Oversaturated soils in the cut slope caused a slide of approximately 150 tons of material onto the road surface. This caused a large amount of rain runoff to flow across the road and saturate the fill slope, which then also failed.

Scope of work:

Repair the cut slope failure (approximately 105' x 140' x 8' deep slide) by regrading to match surrounding topography, placing rolled erosion control system to revegetate cut slope.

Repair the fill slope failure by constructing a reinforced soil slope, remove 150 tons of slide debris from road surface, and replace road surfacing material and reshape ditch lines through this section.

Comments:

After evaluating the slope geometry and volumes, we concluded that constructing a reinforced soil slope, using geogrid and simple backfill material would be the least cost alternative for this site. See attached justification sheet.

Damage Type(s) Embankment Collapse – Full;Debris;Surfacing Loss/Damage;Roadway Damage Primary Damage Feature: Embankment Primary Damage Feature Condition: Failure/ Collapsed

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 3 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

Repair Costs Details

Location Coordinates

Name Coordinate Type Description Latitude Longitude 2022 CA Dec FS Atmospheric Rivers Default 37.834513000 -120.081305000

Supporting Information

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 4 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

File Name Coordinate Type Description Site 1N10_2 Lumsden Road sketch

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 5 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

20230501_105251

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 6 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

20230501_105130

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 7 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

20230501_105201

EMERGENCY RELIEF FOR FEDERALLY OWNED ROADS (ERFO)

DETAILED DAMAGE INSPECTION REPORT (DDIR)

Disaster No: CA2023-1-FS Sheet: 8 of 8

Report Name:

01N10_2_MP9.17

Status: Pending

Version No: 3 06/07/2023Version Date:

File Name Coordinate Type Description 20230501_105242

Notes and Attachments

Title Description Created Date Modified Date 12/20/2023 12/20/2023

01N10_2_Slope Write Up 12/21/2023 12/21/2023

Sketch Site 2 12/20/2023 12/20/2023

06/29/2023 06/29/2023

Site 1N10_2 Lumsden Road sketch 06/15/2023 06/15/2023

20230501_105251 06/15/2023 06/15/2023

20230501_105130 06/15/2023 06/15/2023

20230501 105201 06/15/2023 06/15/2023

20230501_105242 06/15/2023 06/15/2023