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21

I-280/Wolfe Road Interchange

In its current state, the I-280/Wolfe Road Interchange is severely congested and was projected to operate at a poor level of service as local developments continued to outpace the capacity of the existing infrastructure. As the primary point of access for the Apple Park Campus and Vallco Shopping Center, the interchange serves as a gateway to the City of Cupertino. Working closely with the City and VTA, HMH quickly recognized the need for seamless implementation of complete streets elements and thorough consideration of the bicycle and pedestrian user experiences critical to the long-term success of the project.
HMH has led this project since conception, performing an Alternatives Analysis and PSR-PDS, clearing the project under a CE/CE and securing approval of the PR, and performing PS&E and Right-of-Way Engineering, including condemnation support and advance utility relocation. The Project has secured PS&E approval (conditional) and is positioned to be bid July, 2024.
Early in the environmental phase, HMH successfully reduced the project to only one viable Build Alternative and managed to avoid impacts in the Junipero Serra Channel which crosses through the interchange. These achievements allowed the project to downscope the environmental phase to a CE/CE, saving hundreds of thousands of dollars.
The project has been included in Caltrans District 4 Bike Plan Update (2023) as a Best Practices Guide for interchange treatments and includes off-street, curb separated, Class IV bikeways and wide sidewalks.
To protect the Junipero Serra Channel box culvert, the project implemented lightweight cellular concrete to load balance the new embankment fill required for the raised, precast girder structure and ADA compliant profile.

22

South Main Street Reconstruction

In January 2015, the City engaged HMH to prepare PS&E for pavement reconstruction, sidewalk repairs, accessibility upgrades and traffic signal improvements on a very accelerated schedule.  To meet funding deadlines, HMH prepared plans, specifications and estimates for the 1.2 mile long project in approximately six weeks, using expedited submittals and “over-the-shoulder” reviews to accomplish City approval for advertising.
An important design challenge was lowering the crown of the street to reduce excessive cross-slope.  The center of South Main Street includes old concrete pavement overlaid with layers of asphalt concrete over many years, such that shoulder grades were up to 10% at certain locations.  HMH developed a solution to grind off all the old asphalt concrete, and replace it with a much thinner “sandwich” section of pavement mat between two asphalt concrete lifts, which substantially reduced the height of the crown and the cross-slope.

23

South of Forest Neighborhood Improvements

The South of Forest Neighborhood lies west of Winchester Boulevard between Forest Avenue and Stevens Creek Boulevard.  The streets in this formerly unincorporated residential area were built to an outdated standard, and over the years had become badly deteriorated.  To avoid substantial road maintenance expenditures, the City of Santa Clara established a plan to reconstruct the curbs, sidewalk and paving of these neighborhood streets in four annual phases.
For Phase 1 in 2009, HMH prepared the construction documents for Cecil Avenue and Dorcich Street.  The design included new monolithic curb, gutter and sidewalk, and a new pavement structural section, constructed by in-place rehabilitation with a cement treated base and a 3-inch asphalt concrete surface. Critical to the design was maintaining the elevations at the back of walk in order to minimize the amount of conform work required on private property.
Phases 2 and 3, consisting of the next six parallel streets, were combined into a single construction package to take opportunity of the good bidding climate.  HMH completed PS&E for this construction package on a fast-track schedule and construction moved quickly to completion in February 2011.
HMH also designed the Phase 4 improvements for the last two streets, Harold Avenue and Brookside Drive.  HMH staff assisted the City with presentations to neighborhood meetings to consider use of Green Street features, like permeable pavers or bio-swales, to satisfy RWQCB permit requirements.  Based upon community participation, the City has decided to maintain a conventional design, and final PS&E were completed for advertising and construction in 2011.
In 2012, the South of Forest project was awarded the APWA Project of the Year in its category.  HMH was personally congratulated by the South of Forest Neighborhood Association in an e-mail expressing that they “love their new streets and sidewalks!”

24

Tasman Light Rail Corridor Study

HMH was selected by VTA’s predecessor, the Santa Clara County Transit District as Civil Segment Designer for the 4-mile portion of the Tasman Light Rail Project from the Santa Clara Convention Center to near Lockheed in Sunnyvale. Conceptual engineering drawings were prepared in AutoCAD using digital topographic data provided by the County and right-of-way and utility information compiled by HMH under a separate agreement. Submittal of the conceptual engineering documents, preliminary engineering drawings and estimates were made in 1992.
Final design services proceeded as funding was available from until the State Supreme Court overturned the 1992 Measure A sales tax. Design re-started in 1995 after approval of a new funding scenario using Federal Transit Authority (FTA) and state grants. HMH’s segment included four separate construction packages requiring  extensive interface with other designers. The two major packages were completed on time and within budget in early 1997.

25

Santa Clara County I-680 Corridor Study

HMH was engaged by VTA to develop the Santa Clara County I-680 Corridor Study as a strategic plan for the 10-mile segment of I-680 in Santa Clara County. The I-680 Corridor is an important north-south corridor serving as a major commute route between Alameda and Santa Clara counties, as well providing mobility from the South Bay area to the rest of the Bay Area and beyond. I-680 has ten major roadway crossings in the study corridor including major interchanges at SR 237/Calaveras Boulevard, Montague Expressway, Alum Rock Avenue, Capitol Expressway, and US 101/I-280.
The Santa Clara County I-680 Corridor Study identifies and evaluates a range of potential transportation improvements along the corridor that promote mobility and connectivity, enhance safety, support economic vitality and sustainability, and are sensitive to the environment and community values. The range of potential projects includes highway congestion management, multimodal accessibility, noise abatement, and bicycle/pedestrian connectivity improvements. The improvements identified in the corridor study will set the stage for inclusion in VTA’s Envision 2040 process, with future prospects for programming and implementation.
The stakeholders in this study included Caltrans, who administered Federal grant funds with critical deadlines, the County of Santa Clara, and the Cities of Milpitas and San Jose. In addition to liaison with agency staff, a public outreach process was held to receive input and feedback from the local communities. A public open house meeting was held to receive ideas on proposed improvements and to incorporate them into the study. HMH also worked with VTA to use a web-based “crowd-sourcing” interface to obtain public input on problem areas. This web-based outreach was a tremendous success generating over 500 responses on a broad range of highway, transit/local street, bike and pedestrian issues.

26

Silicon Valley BART Extension

HMH Engineers performed a critical role on the SVBX C700 Design-Build team that included performing utility coordination for design, preparing plans and specifications for municipal storm drain, sanitary sewer and water system relocations and topographic surveying.
As a key subconsultant to the design joint-venture, HMH was deeply involved in early utility relocation activities, assisting in coordinating relocations of Chevron petroleum lines, major PG&E gas transmission mains and numerous power, telecommunications and water facilities. We were also responsible for design of four critical early relocations of storm drain, sanitary sewer and water facilities, including a 66-inch and 42-inch welded steel transmission lines operated by Santa Clara Valley Water District.
The BART Berryessa Extension is a 10-mile, two-station extension, beginning in Fremont south of the BART Warm Springs Station and proceeding in the former Union Pacific Railroad right-of-way through Milpitas, the location of the first station, and then to the Berryessa area north of San Jose, where the second station is located. This is the first phase of the extension of the existing BART system to Santa Clara County. Phase II is a 6-mile phase that includes a 5.1 mile long subway tunnel through downtown San Jose, and ends at grade in Santa Clara near the Caltrain Station.

27

Montague Expressway Widening

This project widened Montague Expressway to provide for eight through lanes (three through plus one HOV lane in each direction), with bike use shoulders and improved pedestrian sidewalks from Falcon Drive to Pecten Court (approximately 0.8 miles) including replacement of the double-box culvert crossing of Berryessa Creek with a bridge structure. The project design required close coordination with the SCVWD, the BART SVBX C700 project, and the BART SVBX D720 design for the south leg of Milpitas Boulevard.
In addition to the widening and raising of Montague Expressway and Milpitas Boulevard, the project involved modification to drainage systems, relocation of utilities to include twenty-six PG&E electrical poles, compliance with current C.3 regulations, and traffic signal improvements at both Milpitas Boulevard and Pecten Court.
Our services also include field topographic surveying, boundary mapping, and production of all plats and legals needed for right-of-way and easement acquisitions.
 
 

28

El Camino Bus Rapid Transit

The El Camino Bus Rapid Transit is the rapid transit connection from downtown Palo Alto through Mountain View, Sunnyvale and Santa Clara to downtown San Jose.  The BRT alignment runs for 17 miles along El Camino Real (currently State Route 82) from the Palo Alto Transit Center to just north of Portola Avenue, and along The Alameda to the Diridon Caltrain Station near HP Pavilion.   The design features mixed-flow lane segments and dedicated lanes along El Camion Real.
HMH’s role for conceptual engineering is utility investigation and right-of-way mapping.  We researched record utility information and made field investigations to prepare CAD mapping of existing utility record data and field information.  We also researched and mapped existing right-of-way based on record maps and assessor’s parcel maps.

29

Gilroy Sidewalk Rehabilitation

Several older sidewalk areas within the City were in need of repair, so City staff decided to address this need and apply for ARRA federal funding as part of the stimulus program in 2009.  The City engaged HMH to coordinate the design with the Caltrans Local Assistance Engineer, prepare the E-76 documentation, and produce the necessary construction documents to implement the project.  The City identified this sidewalk rehabilitation project as one of their “shelf-ready” projects that could be implemented quickly.
The project was performed on a fast-track schedule, which required close coordination with the Caltrans Local Assistance Engineer, the City’s inspector and the contractor.  The project included the removal and replacement of sidewalk, curb and gutter at isolated locations within eleven separate street segments throughout the City of Gilroy.  The sidewalk improvements encompassed nine miles of city streets and included ADA upgrades.

30

Remington Drive Rehabilitation

The Remington Drive Pavement Rehabilitation and Resurfacing project consisted of pavement rehabilitation and resurfacing of approximately half a mile of Remington Drive from Sunnyvale-Saratoga Avenue to El Camino Real. The project included the dig-out and replacement of selected asphalt surface areas, asphalt concrete overlays, isolated sidewalk and curb and gutter replacement, loop detector replacement and the restriping of the roadway.
HMH performed civil engineering, land surveying and geotechnical and pavement analysis work necessary to prepare a set of plans and specifications for public works bidding.