Mountain Counties Bridge Rails

Description

Mountain Counties Bridge Rails- Addendum to the Categorical Exclusion/Initial Study with Proposed Mitigated Negative Declaration.

Amended previous final environment document to reflect change in scope, from upgrading bridge rails at four locations, to upgrading bridge rails at two locations: West Fork Carson River Bridge Number 31-0022 and Silver Creek Bridge Number 31-0011, replace the Markleeville Bridge Number 31-0002, and close off the West Fork Carson River Bridge Number 31-0005 to vehicle traffic.

Alpine County Bridge Map

Project Benefits

Purpose: To bring bridge rails up to current standard.

Need: To bring bridge railing into compliance with current standards of The Office of Structures Maintenance and Investigations.

 

Estimated Funding Breakdown

Local: N/A
State: $898,000
Federal: $6,932,000
Construction Cost: $7,830,000

This project is funded in part by Senate Bill 1 (SB 1), the Road Repair and Accountability Act of 2017.

 

Partnerships

Alpine County

 

Proposed Project Schedule

Final Environmental document to be completed: 1/15/19
Right of way acquisition to be completed: 4/3/20
Design to be completed: 6/22/20
Advertise:1/5/21
Construction to begin: 6/28/21
Construction to be completed: 7/20/23

Project suspended until spring 2022 due to the Tamarack Fire and winter season closure.

Work will be conducted as follows:

 West Fork Carson River Pedestrian Bridge

Location 1: State Route 88, West Fork Carson River

  • At the top of Woodfords Canyon in a section of Route 88 that is bicycle accessible.

     

  • Existing bridge rail will be replaced, then existing asphalt concrete will be removed from the bridge deck and polyester concrete will be installed, tying into the highway at both ends.

     

  • One-way traffic control is planned, and motorists should expect 10-minute delays.
 West  Fork Carson River Bridge   West Fork Carson River Bridge  Carson River Bridge

Location 2: State Route 88, West Fork Carson River

  • About a mile east of Location 1 in Shingle Mill Flats on an unnamed local road off Route 88 that ends after approximately 930 feet, this bridge provides access to a local fishing and recreational area and will only be open to pedestrians.

     

  • No traffic impact is anticipated as this bridge is off the alignment of Route 88.

     

  • Both West Fork Carson River Bridge locations are between Picketts Junction and Woodfords.

 

Markleeville Creek Bridge Sign   Markleeville Creek Bridge Underside View    Markleeville Creek Bridge Close-up

Location 3: State Route 89, Markleeville Creek

  • This bridge on a key route connecting Route 4 and Route 88 in Markleeville will be replaced with a new, wider bridge to meet 8-foot shoulder standards and allow pedestrians and bicyclists to safely cross.

     

  • Riprap as scour mitigation will be installed along the northern bridge abutment.

     

  • Both north and south bridge abutments are within the active creek channel. In-water work will be conducted during the in-water work window (June 1 to October 15).

     

  • Drainage culverts will be replaced.

     

  • One-lane traffic control will be employed during construction.

     

  • One side of the bridge will be removed and reconstructed during the first stage, while the opposite side of the bridge will be removed and reconstructed during the second stage. Temporary traffic signals will be installed.

 

Silver Creek Bridge 

Location 4: State Route 4, Silver Creek

  • Much of this section of Route 4 between Route 89 and Ebbetts Pass is bicycle accessible.

     

  • Existing bridge rail will be replaced, then existing asphalt concrete will be removed from the bridge deck and polyester concrete will be installed, tying into the highway at both ends.

     

  • One-way traffic control is planned, and motorists should expect 10-minute delays.

The project was awarded to Bridgeway Civil Constructors of Vacaville, CA.

Construction is scheduled to begin as listed, but is subject to change due to traffic incidents, weather, availability of equipment, and/or materials and construction related issues.

 

Project Contact Information

Project Manager: Mimi Hiue

Senior Environmental Planner: Scott Guidi

Public Information Officer: Bob Highfill

District 10
Public Information Office: (209) 948-7977
Email: district10publicaffairs@dot.ca.gov

For more information and updates on additional projects, visit dot.ca.gov/d10/projects or on Twitter via @CaltransDist10.

 

Documents

Addendum - March 2020 (PDF) 1,404KB