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Summit Engineering | Featured Projects

Idaho Street Project, Elko, NV

Idaho Street (Elko Regional Road Repair Plan)
Elko, Nevada

Summit Engineering was chosen to undertake the Elko Regional Road Repair Plan, which included the reconstruction of approximately 3.8 miles of Idaho Street and the rehabilitation of a large portion of 12th Street in Elko, Nevada. Idaho Street is the main thoroughfare that bisects Elko and has been referred to as "The Lifeblood" of the community. Twelfth Street is also a heavily-used arterial, providing a shortcut between Idaho Street and the Lamoille Highway. Sage Green Landscape Architects was the landscaping consultant and Fehr and Peers was the traffic control consultant.

In work that was coordinated by both our Reno and Elko offices, Summit completed its assigned tasks in little more than five months—a very compressed time frame. Extensive topographic surveys produced more than 15,000 collected data points and photogrammetric mapping was vital in the success of this project. The final plan-set, containing 142 sheets, included demolition, plan and profile, grading, striping, detail, landscaping, and traffic control plans. Summit's engineers and geotechnical staff assembled the materials testing schedule and reporting, which provided the basis of the roadway designs.

The City of Elko wished to rehabilitate as much roadway as possible with available funds, which resulted in unique project bid documents. Seventeen optional bid items, which ranged from street-side landscaping to 12th Street AC rehabilitation alternatives, were included in the bids. In an effort to investigate all cost-saving methods, Summit performed studies incorporating geo-grid in the road base section to reduce the required AC thickness. This alternative did not prove to be cost-effective in the end. Additional project challenges included finding the extents of an underlying concrete road surface which averaged six inches in thickness; minimizing off-haul and material import by adjusting roadway sections based upon traffic load; planning future utilities and conduits to be included in the project; coordination with affected business and residential owners to ensure each pf them agreed with the project design and construction schedule. Project construction began in April 2011 and was completed in November 2011.

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Cortez Canyon Road Realignment

Lander County Road Realignment
Lander County, Nevada

Cortez Gold Mine developed a mine plan associated with the discovery of a new ore body. Waste material was to be placed in Cortez Canyon, necessitating the realignment of Cortez Canyon Road, which is both county-owned and maintained. The proposed 14-mile roadway realignment of a two-lane gravel road was designed to AASHTO very low volume road and Lander County road standards. Summit provided hydrological analysis utilizing HEC-1 and HEC-RAS software to analyze the existing contributing hydrographic basin. The SCS Curve Number Method was used to determine peak flows from the contributing hydrographic sub-basins. HEC-RAS was used to determine flow regimes at significant confluence points and at the proposed road crossings. In addition, Summit's photogrammetry department, through the use of the soft-copy orthophotography, provided topographic mapping in support of the civil engineering design. Summit survey staff also provided mapping of all the current and proposed rights-of-way for this relocation.

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Verdi-Lawton Sewer Interceptor

Lawton-Verdi Sewer Interceptor
Verdi, Nevada

Phase 4 of the Lawton-Verdi sanitary sewer interceptor project was an extension of an existing sewer interceptor (Phase 3) also designed by Summit. It connects to Phase 3 near Mogul and terminates at Boomtown Hotel/Casino. The line size ranges from 18" at Boomtown to 30" at Mogul.

Summit's role included aerial topographic mapping, choosing an alignment; sizing the line from a previous sewer study (also performed by Summit); performing geotechnical investigation along the chosen route; providing civil design plans, profiles, details, and traffic control criteria; providing solicitation documents; performing contract administration services; and providing construction staking, inspection, testing, and administration services. Throughout the course of the design, Summit also applied for and obtained a Union Pacific Railroad (UPRR) encroachment license, NDOT encroachment permits, Army Corps of Engineers permits, and several other pertinent permits.

Several design challenges included designing the sewer interceptor to fit between a steep slope and a railroad track, a 350-foot long bore under an I-80 bridge abutment, a 190-foot long bore under two sets of Union Pacific railroad tracks, a crossing under the Truckee River , and a crossing under Highland Ditch.

A significant segment of the sewer line was routed between a set of UPRR tracks and an adjacent 1½ to 1 steep cut slope with loose boulders. Summit 's design team researched various techniques for slope stabilization and eventually chose and designed soil nailing as the most appropriate method. The design was approved by UPRR and the City, and the construction operation was carried out flawlessly.

As for the two bores, Summit designed a system that involved steel bore casing and carrier pipes with spacers. For the Truckee River crossing, Summit designed the sewer line to be encased in a reinforced concrete beam anchored in each bank and placed below the normal river bed. In addition, Summit also designed a river water diversion system that allowed the contractor to construct the sewer line without significant impact to the river and to meet federal clean water act requirements. The Highland Ditch crossing was designed and constructed to meet TMWA standards.

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If we can add value to your next project, please contact Summit Engineering at (775) 747-8550 in Reno or (775) 738-8058 in Elko. We welcome the opportunity to work with you and your team.