I-5 Grade Raise
| Project ID | EA | District | County | Route | Funding Program |
| 0323000171 | 03-4J470 | 03 | SAC | 5 | SHOPP |
Project Description:
Near Elk Grove, from Mokelumne River Bridge to Lambert Road Undercrossing. Raise roadway profile, rehabilitate roadway and drainage systems, and upgrade signs and Transportation Management System (TMS) elements.
(Long Lead Project)
Purpose:
The purpose of this project is to restore and improve the existing pavement condition and extend the life of transportation infrastructure. The project aims to preserve and sustain the I-5 corridor and its structures, while enhancing safety, reliability, rideability, and existing drainage systems. It also includes improvements to highway signs, traffic management systems, and safety elements within the project limits.
Sustainability
The I-5 corridor experiences flooding during major storm events which was highlighted by recent storms which occurred between December 31, 2022 and January 21, 2023. According to the Caltrans District 3 Climate Change Vulnerability Assessment Map, there is a forecast 2.4% rise in the 100-year precipitation depth for 2055 in the project corridor. I-5 within the project limits is also listed as a SLR risk in the same assessment map. North of the slough structures the mainline profile elevation falls below the 12’ to 13’ water surface elevation level of a 10-year storm event, as determined by the Federal Emergency Management Agency (FEMA), as shown on their current Flood Insurance Risk Maps (FIRM). Over time, the existing roadway could be eroded and inundated, resulting in the loss of a safe, reliable transportation corridor.
Safety
Current inside shoulder along the I-5 corridor is below minimum standard. Bridge approach railing and guardrail are not to current MASH standards.
Drainage
Drainage assessment indicates that multiple culvert systems within the project limits are in fair to poor condition. Drainage system expansion is required to sufficiently capture stormwater runoff along the corridor.
Pavement
Existing pavement within the project limits exhibits signs of distress. Based on the pavement assessment, in flexible pavement sections, Alligator B Cracking will rise from the 2021 Automated Pavement Condition Survey (APCS) measurement of 0.00 % to 12.20% within the project limits by Ready To List (RTL) year 2030/2031. The third stage cracking for the rigid pavement sections will increase from 1.57% in 2021 to 4.35% by RTL year 2030/2031. If pavement conditions are not addressed, the existing pavement is expected to further deteriorate which would result in higher maintenance costs.
Drainage: Drainage assessment indicates that multiple culvert systems within the project limits are in fair to poor condition.
Lighting Systems: Asset Condition is Poor, Life Expectancy Exceeded for all, two have damaged foundations, maintenance unable to replace pole.
Transportation Management System (TMS): Transportation data collection is
inadequate within the project limits.
Transportation Management System (TMS)
Transportation data collection is inadequate within the project limits.
Other
Post-mounted signs that are non-standard have been identified within the project limits. One overhead signal ahead flashing beacon is at the end of its life cycle.
Funding:
This project is programmed in the 2024 SHOPP and has been funded with the 20.XX.201.122 Roadway Rehabilitation Program as a long lead project.
| Support Cost | $21,820,000 |
| Capital Cost | $87,681,000 |
| Total Project Cost | $109,501,000 |
Schedule:
| Project Approval & Environmental Document | October 2025 |
| Design Completed | October 2030 |
| Advertise Project | November 2030 |
| Begin Construction | February 2031 |
| Complete Construction | February 2033 |
Project Contacts:
John Bamfield, Project Manager, (530) 720-9938; John.Bamfield@dot.ca.gov
Sergio Ochoa Sanchez, Public Information Officer, (916) 826-3093; Sergio.Ochoa.Sanchez@dot.ca.gov