Streets & Highway

Streets & Highway


← Back to Portola Parkway, Portola Springs & Modjeska Infrastructure Improvements


After years of continued population growth, development within Orange County has spread into previously undeveloped land. To manage the infrastructure demands on this continued growth, the City of Irvine undertook the Portola Parkway, Portola Springs and Modjeska Roads Infrastructure Improvements project. This improvement project addressed current and future needs for mobility and accessibility providing necessary improvements and expansion for a once rural road that now connects North and South Orange County.

Cannon provided civil engineering design, including plans, specifications, and estimates, and survey services for the design and construction of the public street backbone infrastructure for the 2.1-miles of Portola Parkway, 1.2-miles of Portola Springs Road, and 0.5-miles of Irvine Boulevard. The improvements for Portola Parkway included the design of a variable-thickness pavement overlay, 15 ADA ramp improvements, traffic signal design, traffic signal modifications, intersection improvements, new curb and gutter, raised median, an extensive storm drain system, the undergrounding of electrical poles, CATV, telephone, and gas utilities, and design of one mile of two new collector roads, which included right-of-way takes along Irvine Company property and construction traffic planning.

Our services included survey mapping, right-of-way base maps, and right-of-way dedications for Portola Springs Road and numerous easements for various utilities. Cannon also provided the design of capital water and sewer facilities, with sizes ranging from 12-inches to 36-inches, and non-capital facilities including 8-inch domestic water, 5,400-linear feet of 8-inch and 1,500-linear feet of 10-inch poly vinyl chloride (PVC) sewer lines to meet master plans prepared by the Irvine Ranch Water District (IRWD). We also prepared a hydrology and hydraulics report and design of three miles of storm drain, up to 96-inches, and 8-foot x 12-foot storm drain boxes. In addition, Cannon prepared Storm Water Pollution Prevention Plan (SWPPP) and Water Quality Management Plan (WQMP) for all project design components. The design also included a 285 foot-long, 48-inch diameter wildlife crossing corridor under Portola Springs Road on the south side of the fire station. Cannon obtained approvals from the City of Irvine, Irvine Ranch Water District (IRWD), Caltrans (both Toll roads) and was completed on schedule.

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Irvine, California

Streets & Highway