Old Creek Bridge Replacement

Project Description

The bridge replacement project is under construction by Papich Construction Company, Inc., with in-creek work planned June 1, 2022. The project proposes to address existing geometric and seismic deficiencies of the existing northbound Old Creek bridge (Bridge Number 49-0070R) by constructing bridge rails that meet updated roadside safety hardware testing requirements and providing standard shoulder widths via replacement of the existing bridge structure. Other work includes adding rock slope protection, upgrading guardrail, upgrading end treatments, and adding preparation for plant establishment.

The new bridge would comply with current seismic, hydraulic, and structural standards. The proposed bridge would maintain the existing two traffic lanes and provide improvements that would include bridge rails that would comply with the Manual for Assessing Safety Hardware (MASH) and standard shoulders that would accommodate a Class III bicycle route. The bridge approaches would also be modified to match the existing roadway with the new bridge.

Traffic will be detoured during construction. Bicycle and vehicle traffic will be detoured onto the southbound Old Creek bridge, with an optional bike detour through San Luis Obispo County roads, and both the northbound and southbound traffic will have one dedicated lane in each direction through the construction duration, expected to run through spring 2023.

project vicinity map

Project Benefits


The purpose of the project is to address geometric and structural deficiencies of the existing Old Creek bridge (Bridge Number 49-0070R).


The existing shoulders of the road on the Old Creek bridge are non-standard (approximately 2 feet wide). The non-standard shoulder widths do not allow for bicycle traffic to pass over the bridge without sharing the Number 2 outside lane with automobile traffic.

In addition to the non-standard shoulder widths, structural and geotechnical investigations have revealed that the existing bridge’s foundations are seismically deficient. Correcting this deficiency would be required to accomplish the widened shoulders over the bridge. The existing bridge railing will also be replaced to meet MASH-compliant roadside safety hardware.  

Estimated Funding Breakdown

Funding Source Funding Amount
State $14,773,000 (support, construction and right-of-way capital)
Federal $1,271,000 (support costs)
Construction Cost $9,781,000 (including $450K right-of-way capital)


Proposed Project Schedule

Process Date
Construction to begin April 2021 (utility relocations)
Construction to be completed June 2023, plus 1 year of plant establishment


Project Contact 

Public Information Office, Caltrans District 5
Phone: (805) 549-3318

Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.