Streets & Highway

Streets & Highway


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


As Orange County grew into previously undeveloped land, the City of Irvine (City) witnessed a rise in new communities within its city limits. The City needed road infrastructure improvements to address future needs for mobility and accessibility and to expand a once rural road to connect North and South Orange County.

Cannon provided civil engineering design including survey services and plans, specifications, and estimates (PS&E) for the design and construction of the public street backbone infrastructure. This encompassed 2.1 miles of Portola Parkway, 1.2 miles of Portola Springs, and 0.5 miles of Irvine Boulevard. The Portola Parkway improvements included designing a variable-thickness pavement overlay; 15 ADA ramp improvements; traffic signal design and modifications; intersection improvements; new curb and gutter; raised median; an extensive storm drain system; the undergrounding of electrical poles; CATV, telephone, and gas utilities; construction traffic planning; and 1 mile of two new collector roads (Portola Springs and Modjeska) that included right-of-way takes along Irvine Company property.

Cannon’s survey services included topography of roadways, base-mapping, right-of-way exhibits, construction staking, and dedications and easements for utilities at Portola Springs Road. Design services included the capital water and sewer facilities and the non-capital facilities, which included 8 inches of domestic water and 6,900-linear feet of poly vinyl chloride (PVC) sewer lines. These were prepared to meet master plans prepared by the Irvine Ranch Water District (IRWD). Cannon also prepared a hydrology and hydraulics report and designed three miles of storm drain, up to 96 inches, and 8-foot by 12-foot storm drain boxes.

In addition, Cannon prepared a Storm Water Pollution Prevention Plan (SWPPP) and Water Quality Management Plan (WQMP) for project design components. The design 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), and Caltrans (both Toll roads), and completed the project on schedule.

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Irvine, California

Streets & Highway