Greenroads Certified Silver

Hacienda Green Street Improvements

 

Summary

The City of Campbell is home to the fifth certified Greenroads Project in Northern California and several firsts for Greenroads. A great before and after story, here are some highlights:

  • It's the first Silver Certification in the state of California!
  • It's the first 'road' diet project, trimming down an enormous 90 foot wide impervious two-way residential street
  • It's the first project to use full depth reclamation (FDR) for pavement construction, boasting a resulting savings over the conventional alternative of 50%. (A savings of about 2 million bucks, no small potatoes! Way to go Campbell!)

Construction Cost: $4.99 million

Length: 0.9 mi (1.8 lane-miles)

Primary Owner/Design: City of Campbell, CA

Funders/Stakeholders: Federal Transportation Enhancements (TE) grant, California Department of Water Resources

Design Support: Callander Associates

Prime Contractor: Ghilloti Bros (prime)

Subcontractors: Reed & Hanson, Graniterock, Granite Construction, Bortolussi & Watkin, St. Francis Electric, and Chrisp Co. 

Functional Class: Minor Collector

Greenroads Version: 1.5

Description

The project scope included will perform street narrowing, installation of linear parkway serving as stormwater infiltration areas, reconstruct roadway using recycle method such as Full Depth Recycling (FDR), install sidewalk infill and dedicated bike lanes.

The City of Campbell started working with Greenroads very early in design and had a great sustainability strategy throughout their first Certification process. Their goals were to reconstruct and restore failed asphalt pavement, improve connectivity between neighborhoods, and encourage more active transportation along the improved linear parkway connecting to Los Gatos Creek County Park and Trail. They started with the environment in mind and explicit goals to minimize long term environmental impacts through low impact development (LID) stormwater features, reducing impervious areas and adding vegetation.

This is also the first project to note specifically a desire to "reduce the roadway carbon footprint" as a performance measure. The average energy consumption and carbon footprint of a roadway (one lane wide, one kilometer long) is about equivalent to that of 100 average American households per year (4 terajoules and 300 MT CO2). Did they do it? Let's see their stats.

Features

  • The full depth reclamation (FDR) approach saved the City half the cost vs. the conventional alternative to remove and replace the old street, reusing more than 80% of what was there before. 
  • Reduced the lifetime CO2 footprint for the road by 33%! (about 100 MT less per lane km)
  • More than 42,000 square feet of new sidewalk area and accessbility improvements
  • Brand new bike lanes and transit stop amenities
  • Stormwater management using bioswales throughout the corridor with on-street parking, treating and controlling more than 90% of rainfall to enhanced quality standards
  • Total amount of vegetation was increased by nearly 1 acre (147%!) including street trees and 'Bay Friendly' landscaping with non-invasive vegetation and water-efficient drip irrigation
  • Over 97% (by weight) regionally-sourced materials within 150 miles

Hacienda Avenue West (east of Capri)

Hacienda Green Street Improvements Final condition

Hacienda Avenue New Landscaping and Parking Lane

Hacienda Avenue Pavement Construction and Grading Work

Hacienda Avenue Road Diet included substantial reductions in impervious area.