Phone: (530) 265-3202 • Fax: (530) 265-3260
101 Providence Mine Road • Suite 102
Nevada City, CA 95959
Current Projects
Grass Valley     Truckee     Nevada County     Nevada City

For reports relating to current projects, please visit the Reports section of the website.
  See descriptions of current projects below.
Grass Valley
Dorsey Drive Interchange

Construction of the Dorsey Drive Interchange started on May 6, 2013 and is scheduled through fall 2014.  The City of Grass Valley is the lead agency working in partnership with the Nevada County Transportation Commission and Caltrans.  Construction information will be posted on a special website at  You can sign up on the website to receive electronic notices of traffic alerts and project updates.  A project information hotline is also available at (530) 268-4573.  Construction will generally take place Monday through Friday from 7:00 a.m. to 5:00 p.m.  The contractor, McGuire and Hester of Oakland, may also work at night on occasion.  The bid for construction was approved at $15,191,874.

The Dorsey Drive Interchange project will convert the existing overcrossing of SR 20/49 to an interchange that allows access to the Golden Center Freeway in Grass Valley. The purpose of the project is to provide improved access to high-use sites in the area, including the Nevada County Sierra College Campus and Sierra Nevada Memorial Hospital. The interchange will also improve traffic operations at the adjacent Brunswick Road and Idaho-Maryland Road interchanges and provide additional capacity on Dorsey Drive for future planned development, in accordance with the General Plans of Grass Valley and Nevada County.  Project components include: 

  • Widen the Dorsey Drive overcrossing from two to five lanes with two of those lanes designated for left turns
  • Construction of on- and off-ramps to SR 20/49 
  • Addition of auxiliary lanes on SR 20/49 freeway from Dorsey Drive south to the Idaho-Maryland Road exit and north to the Brunswick Road interchange
  • Widening of Dorsey Drive to East Main Street and to Pampas Drive with enhancements for pedestrians and bicyclists
  • Modify a portion of Joerschke Drive to a one-direction off-ramp for southbound SR 20/49 traffic

September 2014 Newsletter - Dorsey Drive Interchange Project
September 2014 Grass Valley Staff Update of the Dorsey Drive Interchange Project

Click links for 3 aerial views of the Dorsey Drive Interchange project:
The most recent estimated project cost is $25.4 million with construction equaling $15.7 million, right-of-way costs of $4.3 million, and project environmental, design, and support costs of $6.6 million.    

SR 89 Mousehole Truckee
SR 89 is a major artery for vehicles traveling from I-80 to Lake Tahoe and several major recreation facilities in the area. The current Union Pacific Railroad underpass structure on SR 89 in Truckee, known locally as the "Mousehole," has long been the subject of discussion regarding its inadequacies. The structure was completed in 1928 by the U.S. Bureau of Public Roads. It has become a focal point for traffic congestion and needs improvements to provide safe pedestrian and bicycle access. Pedestrians who use the route to access shopping nearby have been observed running through the Mousehole to avoid conflict with cars. Others climb up and over the 25-foot-high railroad embankment rather than risk walking through the underpass. 

Pedestrian walking through Mousehole

The Town of Truckee (as lead agency), Caltrans, and the Nevada County Transportation Commission are providing funding to develop a project to improve traffic flow and safety at the Mousehole. Caltrans assembled a Project Development Team for this project, and after looking at several alternatives, it was determined that due to the high cost of widening the existing vehicle tunnel or adding a new tunnel, the scope of work was then focused on constructing a Pedestrian/Bicycle Undercrossing Tunnel on the east side of SR 89 between West River Street and Deerfield Drive. A 12-foot-wide by 10-foot-high concrete tunnel for pedestrian and bicycle use is planned to be constructed beneath the Union Pacific Railroad tracks east of the existing vehicle tunnel.  In order to construct the project, Caltrans is providing $4.4 million from the State Highway Operation and Protection Program (SHOPP) and $570,000 of toll credits to be used for federal matching purposes.  NCTC programmed and the California Transportation Commission approved an allocation on June 25, 2014 for $3.132 million in State Transportation Improvement Program (STIP) funds.  Truckee is providing $350,000 from its traffic impact fee fund.  Based on current estimates, project construction was underfunded by $1.5 million, so Truckee submitted an application for a federal grant from the TIGER 2013 program in that amount and was awarded the amount needed.  The funds were obligated on June 27, 2014.  The Town received authorization to proceed with construction on June 30, 2014 and the project went out to bid with final bids due August 28th.  The Town hopes to award a construction contract in September or early October 2014.  This will allow the contractor time to prepare the submittals necessary before they break ground in spring 2015.

Updated 9/8/14

Click here to view Mousehole Alternative 1 (
the pedestrian/bicycle tunnel alternative)

March 2015 Update on the Mousehole Pedestrian Tunnel Project

Truckee River Legacy Trail
The Truckee River Legacy Trial is a series of planned trails that locals and tourists alike enjoy year-round.  The Town of Truckee adopted a Trails and Bikeways Master Plan, which provides detailed guidelines for the development of over 130 miles within the Town.  The Truckee River Legacy Trail is a high priority trail.  When complete, this trail will connect the Donner Memorial State Park to the Glenshire neighborhood.  The majority of the route will parallel the Truckee River.  Phase 1 and 2 of the Truckee River Legacy Trail was completed in the summer of 2009 and Phase 3A was completed in 2010.  Phase 3B is opening August 8, 2014 (see invitation below to the opening ceremony).  Phase 4 and 5 are segments to be completed in the future.  For more details, click on the Truckee River Legacy Trail link below.

Truckee River Legacy Trail

Invitation to the Ribbon Cutting Ceremony Opening Phase 3B of the Trail -- August 8, 2014, 4:00 p.m.

Time Lapse Video of the Bridge Being Installed Over Martis Creek -- A crane was used to put the bridge together and to set it in place.  The crane required 220,000 lbs. of counterweight, which you will see being placed on the crane in the beginning of the video.  The bridge was set on June 16, 2014.
Nevada County
Updated 9/8/14
Operational Improvements at Carriage Road and Ladybird Drive
This project will upgrade two intersections on State Route (SR) 49 at Carriage Road and Ladybird Drive by adding right-turn lanes and widening shoulders.  It is funded by the State Highway Operations and Protection Program (SHOPP) Minor A Program.  These improvements are identified as part of the SR 49 Corridor System Management Plan and involved stakeholders from local agencies and local citizens.  The project was awarded to the lowest bidder, Hansen Brothers Enterprises, on October 8, 2013 in the amount of $764,335.  Construction began the week of April 21, 2014 and the roadway excavation and embankment work is completed.  The contractor has installed the roadway structural section and striping is completed.  Existing culverts have been lined.  Trees have been planted and are being watered for proper establishment.  The project is scheduled for completion by the end of August 2014.

Operational Improvements at Holcomb Drive and Cherry Creek Road
This project will upgrade the intersection at Cherry Creek Road on SR 49 by adding a right-turn lane and widening the shoulder.  It is funded by the SHOPP Minor A Program.  The project was advertised on March 24, 2014 and was awarded on June 20, 2014 to Herback General Engineering of Minden, Nevada in the amount of $429,304.  Construction began on August 18, 2014 and is estimated to take 40 working days with completion near the end of October 2014.

Reconstruct Embankment and Roadway at Alta Sierra Drive
Located south of Grass Valley at Alta Sierra Drive, the project will repair the roadway on SR 49 in Nevada County beginning at post mile 9.1/9.2.  It is funded by the SHOPP Minor A Program.  A gradual settlement of the roadway caused cracking in the northbound number two lane and the shoulder.  Cracks have allowed water to infiltrate into the roadbed, and failure to repair the cracked pavement may increase settlement that could result in roadway failure.  This project was awarded to Sierra Nevada Construction, Inc. on April 17, 2014 for $455,007.  Construction began July 28, 2014 and is estimated to take 40 working days.  The contractor is ahead of schedule and completion is scheduled by the end of August 2014.

Shoulder Widening Near Old Downieville Highway
The pavement shoulder will be widened on SR 49 from Old Downieville Highway to Newtown Road and is funded with local Congestion Mitigation Air Quality (CMAQ) funds and the SHOPP Minor A Program.  Environmental studies indicated that wetlands are present on both sides of the roadway, therefore a Mitigated Negative Declaration was required and prepared.  Final environmental clearance was achieved on August 1, 2013.  Project design work is complete.  As part of the environmental clearance commitments, Caltrans was required to obtain the following permits:  404 Army Corp of Engineer (ACE) Wetland & Water of USA permit, 401 Regional Water Quality Control Board, and 1602 Department of Fish and Wildlife Service Streambed Alternation permit.  Bids opened on April 30, 2014 and the project was awarded to the lowest bidder, Knife River Construction, on June 3, 2014.  Construction is anticipated to begin September 1, 2014 for a duration of approximately 40 working days and an estimated completion date in mid-October.  Meanwhile, environmental mitigation required by ACE continues to move forward.

Operational Improvements at Brewer Road
This project will construct a right-turn pocket lane on northbound SR 49 to reduce congestion, potential rear-end collisions, and improve sight distance to northbound traffic.  It is located approximately 10 miles south of Grass Valley at the Brewer Road intersection.  The project is funded from the SHOPP Minor A Program and preliminary design and environmental work started in July 2014 with the Caltrans Design and Environmental units and is scheduled for completion this fall.  Construction is estimated to begin in summer 2015.  Construction capital = $400,000.

Operational Improvements at Smith Road
This project will construct a right-turn pocket lane on southbound SR 49 and will provide a standard public road approach that is tapered with 4 foot shoulders.  Funding is from the SHOPP Minor B Program.  Design and environmental studies will continue through 2014 and 2015 with construction planned to begin in summer 2016.  Construction capital = $200,000.

SR 49 Widening at LaBarr Meadows - <Project Completed in 2013>
The State Route (SR) 49/La Barr Meadows Road Project will relocate the existing La Barr Meadows Road intersection at SR 49 just south of the current location and install a traffic signal. The project will also widen the highway from two to four lanes to the north and south of the new intersection with turn pockets to provide adequate vehicle storage and left turn movements at the signal. Frontage roads will be constructed to eliminate direct access to the highway from side roads and driveways. Vehicles will access SR 49 from the new signal. The design features will relieve existing congestion and eliminate ingress and egress conditions that have contributed to a high rate of accidents within the project area. The project limits begin 0.7 miles north of Alta Sierra Drive and extends to 0.5 miles south of Wellswood Way.

The total project cost is estimated at $29.1 million; approximately $20.9 million is programmed through the State Transportation Improvement Program (STIP), $2 million through ARRA (American Recovery and Reinvestment Act) funds, and $6.2 million is being provided from the Corridor Mobility Improvement Account (CMIA), utilizing funds approved by the passage of Proposition 1B. Design and right-of-way for the project were completed in April 2009. The project is scheduled for completion by the end of July 2013.

Click here to view an overview of the SR 49/La Barr Meadows Widening Project

Caltrans Drawing of the SR 49/La Barr Meadows Road Project
(large file ... please be patient as it loads)
Nevada City
No projects at this time
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