Jeffrey Road Infrastructure Improvements

Location: Irvine, California
Client: City of Irvine/Irvine Community Development Company


Project Highlights

  • Civil Engineering Design & Survey Services
  • Intersection Improvements
  • Traffic Signal Modifications
  • Right of Way Engineering
  • Street Widening / Rehab
  • Storm Drain Improvements
  • Water/Sewer Improvements
  • Dry Utility
  • Design and Relocations of Underground Utilities
  • PS&E
  • Construction Document Preparation for Extensive Infrastructure Improvements
  • ADA Compliant Ramps
  • Topographic Map & Base Maps
  • Traffic Control Plans and Traffic Detour Plans
  • Bid Assistance
  • Construction Staking
  • Construction Management


Design began August 2006, and Street Improvement Plan approved June 2012. Construction began October 2012 and completed in September 2014. PENCO was retained to provide civil engineering design and survey services for the preparation of infrastructure plans, including roadway widening and rehabilitation, storm drain, sewer line, water line, reclaimed water, Edison electrical conduits, Cox cable and telephone improvements, right-of-way engineering, potholing and grading for realignment of 1.5-miles of Jeffrey Road, from a four-lane to a six-lane roadway, and improvement of 1.0-mile of Portola Parkway.

Both Jeffrey Road and Portola Parkway include realignments and street design, from a four-lane to a six-lane highway, with raised medians, curbs, sidewalks, ADA compliant ramps, and pedestrian undercrossing.

Jeffrey Road included pavement reconstruction with full use of asphalt material for base replacement. Portola Parkway included grind and overlay for pavement construction.

PENCO services included design and relocations of 8-inch sewer; 12-inch domestic water; 12-inch reclaimed water; new 18-inch to 72-inch storm drain; new 36-inch reclaimed water; new 16-inch reclaimed water; 8-inch medium pressure gas line; undergrounding of 2×66 kV and 12 kV electrical overhead lines; joint trench cable telephone; and 12 kV SCE line, CACI line. Improvement plans were processed and approved by the City of Irvine and Irvine Ranch Water District (IRWD). The project included three new traffic signal designs and four traffic signal modifications. PENCO prepared traffic detour plans for four phases of construction.

PENCO coordinated their street design with the consultants for the Jeffrey Open Space Trail (JOST). Specific design coordination items included the 11’ wide Class 1 trail, the pedestrian undercrossing, grading and drainage, bus stops, meter locations and access ramps.

PENCO’s survey group provided horizontal and vertical control; design survey with GPS-based aerial strip topographic map; 25-foot cross sections; and prepared base maps for civil engineering design. Office survey mapping included new street right-of-way and street vacations. No significant revisions to the design and with less than 2% in construction change orders.

We’re pleased to announce that we merged with Cannon on August 1, 2018.

As we fully transition into the Cannon family, our website will redirect visitors to our parent company, Cannon Corporation’s, website, If you’d like to find out more about the merger, read about it in this press release.