Ghirardelli was selected by the County of El Dorado to provide construction management services for Diamond Springs Parkway Phase 1A State-Route 49 Realignment project in Diamond Springs. Diamond Springs Parkway is a future four-lane divided roadway connecting Missouri Flat Road to State Route 49 (SR-49). The primary purpose of this project is to improve traffic safety and operations on portions of SR-49 in the vicinity of Diamond Springs. The new road will provide parallel connection from SR-49 to US-50 that will relieve traffic congestion through the historic town of Diamond Springs. The project will also improve safety on Diamond Road/SR-49 by reducing residential driveway access with the provision of a new frontage road.
SR-49 / Diamond Road will be realigned to the west to create a frontage road for residences along the east. The realigned road will be improved with two (2) 12-foot and 8-foot shoulders. Other project improvements include:
- Roadway excavation
- HMA paving
- Concrete curb, gutter, sidewalk
- Signing and striping
- Caltrans Type 1 retaining wall with architectural treatment
- Masonry block sound wall
- Permanent and temporary fence removal and construction
- New El Dorado Irrigation District water main
- Utility modification including AT&T, PG&E, and Comcast
- Drainage improvements (underdrains, culverts, ditches)
- Sewer improvements
- Signal and lighting improvements
Client: County of El Dorado
Location: Diamond Springs, CA
