State Route 70 Corridor Projects – Oroville to Marysville
About the ProjectsState Route 70 Corridor Improvement Project – Segment 3, Butte County
- Widen the existing 2-lane highway to five lanes.
- Create a continuous two-way left turn.
- Widen the shoulders to 8 feet.
- Upgrade drainage systems.
- Establish an area for vehicles veering off the roadway to return to the main highway.
- Construct a new bridge with standard lanes and shoulders over Honcut Creek
This project will improve safety along the State Route 70 corridor by providing continuous passing opportunities for vehicles from East Gridley Road to the Butte-Yuba county line. The corridor has experienced higher than average collision rates with the majority of accidents attributed to the lack of passing lanes. The additional lanes will increase highway capacity to meet future economic development, including population growth, in Butte County.
Estimated total project cost: $50 million in state and local funds
Environmental Clearance: December 2019
Design Completed: October 2020
Begin Construction: June 2021
Expected Completion: December 2022
State Highway 70 Safety Improvement Project - Yuba County
The location of the project is in Yuba County between Laurellen Road and the South Honcut Creek Bridge. Work includes:
- Widening and paving shoulders a minimum of 8’ in each direction
- Providing a continuous 14’ two-way left-turn lane (TWLTL)
- Providing a 20’ Clear Recovery Zone (CRZ)*
- Providing passing opportunities
- Providing truck acceleration and deceleration lanes for agriculture-related businesses
- Providing a 6’ unpaved shoulder in addition to the paved shoulder for slow-moving agriculture equipment
- Increasing paved shoulder width to 14’ at school bus stops to provide a safe area for loading and unloading school children
- Installing rumble strips on the shoulders and both sides of TWLTL or centerline
- Straightening horizontal curves (to improve sight distance)
- Flattening vertical curves (to improve sight distance)
- Widening and paving local road intersections to accommodate truck turning movements
- Reconstructing driveways
- Replacing or extending culverts as needed
- Placing asphalt concrete overlay
- Relocating utility poles
*The CRZ begins at the edge of the travel lane. The CRZ includes the 8’ shoulder and an additional 12’ beyond the shoulder that is cleared of fixed objects such as utility poles, trees and ditches.
The project will improve safety and reduce the rate of collisions along this stretch of highway. Within the project limits there are: 136 driveways, 11 county roads, 7 private roads, and 22 farms/businesses. The school buses stop 26 times along SR-70 throughout the area to pick-up and drop-off school children.
Estimated Total Project Cost: $104.6 million in federal and state funds.
Begin Construction: Spring 2022
Complete Construction: Fall 2023
State Route 70 Continuous Passing Lanes Project
The project is on State Route 70 near Marysville in Yuba County between Laurellen Road and the South Honcut Creek Bridge. The project will construct additional pavement to a separate safety project to achieve a 4-lane facility with 8-foot shoulders and a continuous two-way left turn lane bounded by a minimum 20-foot Clear Recovery Zone. At county-maintained roads and certain agriculture-related businesses, the project will provide designated left turn pockets and intersections/driveways that reflect the tractor trailer traffic associated with agricultural operations in this area. Other work includes:
• Removing any physical obstructions Removing any physical obstructions such as trees, utility poles and other fixed objects
• Building roadside ditches outside the clear recovery zone
• Constructing right turn pockets at county-maintained roads
• Increasing shoulder widths to 14 feet at school bus stop locations
• Modifying existing driveways where needed to conform with the widened highway
• Replacing or extending culverts that cross the highway
A Second Alternative proposes separating traffic with a concrete barrier installed in the 14-foot paved median constructed by the safety project. Vehicles entering the highway from homes and businesses will only be able turn right onto Highway 70 and signalized intersections will be placed periodically through the project to allow U-turns for change of direction of travel.
The project will improve highway reliability and efficiency, ensure reliable movement of goods, provide better connectivity between Yuba County and the Sacramento Valley and support the overall economic viability of the Yuba County region.
Estimated Total Project Cost: $36 in state and local funds.
Begin Construction: Spring 2022
Complete Construction: Fall 2023
State Route 70 Simmerly Slough Bridge Replacement
- Construct a new bridge parallel and west of the current structure design and seismic safety standards.
- Realign the highway approaching the bridge on both ends.
- Constructing the new bridge to accommodate five lanes in the future.
- The new bridge will be striped for two lanes and provide for 8-foot paved shoulders, sidewalks on both sides and a concrete barrier separating the shoulder from the sidewalk and bridge railing.
This project will replace the existing Simmerly Slough Bridge on State Route 70 north of Marysville. The bridge no longer meets current design and seismic safety standards. The bridge also is experience scouring activity in which water has been removing sediment such as sand and rocks from around the bridge piers or abutments.
Estimated Total Project Cost: $83.6 million in state funds
Begin Construction: Spring 2019
Complete Construction: Spring 2022
State Route 70 Binney Junction Roadway Rehabilitation and Complete Streets Project
This project is located between 14th Street and Cemetery Road in Marysville. The improvements are to rehabilitate the existing roadway and two-way left-turn lane structural sections, construct two traffic storage/auxiliary lanes, standard shoulders, and standard sidewalks. These improvements will conform to the recently constructed Simmerly Slough Bridge project. The existing Marysville Underpass and Binney Junction Underpass structures have substandard vertical clearances and are often hit by taller vehicles (26 impacts in the past 5 years). The project will replace these railroad structures and SR-70 will be lowered under the structures to meet current vertical clearance standards and improve safety.
The complete streets elements include standard shoulders and sidewalks that will allow pedestrians and bicyclists to safely access SR-70 through the project. The existing east levee north of Binney Junction to Cemetery Road will be relocated to accommodate the proposed project improvements. In addition, the intersections of SR-70/East 24th Street and SR-70/16th Street will be signalized, with access to and from 17th Street being removed.
The project will provide complete streets elements, rehabilitate the existing pavement, improve operations and safety, and bring facilities up to current Caltrans, Union Pacific Railroad and local agency standards. The project also will provide safe routes for students attending the two high schools along the highway.
Estimated Total Project Cost: $111 million in federal and state funds
Draft Environmental Document: September 2020
Project Approval and Environmental Document: December 2020
Advertise Project: Spring 2022
Begin Construction: Summer 2022
Complete Construction: December 2025
Cameron Knudson, Project Manager
Phone: (530) 218-1820
Gilbert Mohtes-Chan, Public Information Officer
Phone: (530) 741-4571