RockSol Consulting Group, Inc.
  • South Fork Smith River Road

    South Fork Smith River Road

  • South Fork Smith River Road

    South Fork Smith River Road

  • South Fork Smith River Road

    South Fork Smith River Road

South Fork Smith River Road


Client:

Federal Highway Administration Central Federal Lands Highway Division

Services:

Construction Management & Inspection

Location:

Del Norte County, California

Project Description:

RockSol performed contract administration, construction management, and quality assurance inspection services for two phases of the South Fork Smith River Road project on behalf of Federal Highway Administration’s (FHWA) Central Federal Lands Highway Division (CFLHD). A 10.3-mile asphalt- and aggregate-surfaced roadway paralleling the winding South Fork Smith River, Smith River Road (Forest Highway 112) is rural collector scenic forest highway within the Smith River National Recreation Area in the Six Rivers National Forest. Prior to the Smith River Road projects administered by RockSol, the two-lane roadway was reduced to one lane of traffic at four bridges and four slide areas. To facilitate the successful on-time completion of these projects, RockSol mobilized a highly experienced project engineer who was responsible for reviewing contractor submittals, inspecting bridge demolition and reconstruction and construction of numerous retaining walls, overseeing traffic control plans, training project staff, communicating with project stakeholders, and maintaining contractor schedule.

Between 2009 and 2010, RockSol managed and inspected the repair of the four one-lane slide sections and the replacement of two of the four bridges, spanning Rock Creek and Boulder Creek. The new two-lane prestressed concrete bulb tee girder structures on drilled shafts are wider than the originals and provide safer access for pedestrian, bicycle, and vehicular use. The slide locations were also repaired to facilitate consistent two-lane travel throughout the route. Principal elements of the work included four mechanically stabilized earth walls totaling 60,000 square feet, two soil nail retaining walls with wire mesh rock slope protection, rock bolts, roadway and bridge widening, curve widening, asphalt paving, culverts, headwalls, waterlines, guardrail, and stage bridge construction.

Between 2013 and 2014, the remaining two one-lane bridges – Steven Memorial Bridge and Hurdy Gurdy Bridge – were replaced. The bridges were replaced with long-span steel plate girder structures with reinforced concrete bridge decks and steel safety railings on caissons. Both bridges were built adjacent to the original structures, allowing the roadway to remain open to traffic on the existing structures during construction. Due to schedule constraints, winter weather conditions and environmental requirements, the water-work window only spans 6 months – May to October – and work not completed during the 2013 construction season was required to be completed after the winter shutdown in the spring of 2014. In addition to the new bridges, approaches, and roadway alignments, the project constructed a new bathroom, parking lot, and trail to the river at the Steven Memorial Bridge site – a popular whitewater boating launch point.