Brief Projects Overview

NCSG has completed projects in several jurisdictions for numerous clients. Our priority is to deliver a quality, timely product that reflects our advanced technical capabilities. We are pleased to share with you a brief overview of some of the projects we have worked on.

Two categories of projects have been included here as follows:

  • "Notable Projects" are examples of projects that had unique and challenging features which required the type of capabilities that NCSG provides.
  • "Other Projects" are examples of projects which demonstrate the range of experience of NCSG.

These are just some of the hundreds of projects where geotechnical services were performed under the direct supervision of Naresh Samtani while at NCS Consultants, LLC or NCS GeoResources, LLC. Naresh has also been involved in several signature projects during his employment at previous firms; examples of these include a world record load test on a drilled shaft as part of the reconstruction of the I10/I19 Traffic Interchange in Tucson, AZ, jet grouting under a new MSE wall located in Sunflower, AZ that had started to fail shortly after construction, geotechnical oversight role on the Big I (I25/I40) Traffic Interchange reconstruction in Albuquerque, NM, etc. Contact Us if you need more information.

Notable Projects

SR 264 Second Mesa: GeoFoam Wall

I17 Anthem: MSE Abutment Repair

Kino Parkway: Veterans Memorial Overpass

SR 89A Banjo Bill: Anchored Micro-pile Wall

SR 89A Jerome: Emergency Wall Repair

Mt. Lemmon Highway: Emergency Repairs

I10 Widening: St. Marys Road to 29th Street

Loop 202: Red Mountain Freeway

US 191: Coronado Trail Asset Management

US 60: Pinto Valley

Pima County Joint Court Complex

I10 Fort Grant TI: Deep Soil Mixing

Other Projects

I-10/Miracle Mile TI: MSE Wall Distress

Location: Tucson, AZ
Client: ADOT
Status: Completed

Cracks had formed in the cast-in-place (CIP)concrete facing of two MSE (mechanically stabilized earth) retaining walls along the WB lanes of I-10 at the Miracle Mile TI. NCSG was tasked with determining the cause of the cracking, and providing recommendations for mitigation. Detailed distress maps were prepared based on optical survey results. An array of…

SR 170: San Carlos

Location: San Carlos (Near Globe), AZ
Client: Speedie and Associates Inc. for ADOT
Status: Completed

Design of a light-weight concrete fill (LCF) retaining wall for a sidehill roadway widening. Railroad tracks were within 20-ft of the toe of the existing slope, with a Southwest Gas Pipeline between the slope and the tracks. Additionally, the subsurface conditions consisted of soft, saturated, clayey soils. Settlements from surcharges needed to be minimized to…

SR 90: Sierra Vista Multi-Use Path

Location: Cochise County, AZ
Client: ADOT
Status: Complete

The purpose of this project is to construct a Multi Use Pathway (MUP) along SR 90 between Fort Huachuca East Gate and North 7th Street in Sierra Vista. NCSG performed field and laboratory investigations, provided earthwork factors, compaction factors, evaluated collapse potential, and provided recommendations for two retaining walls. One of the walls designed involved…

Ryan Dike

Location: Graham County, AZ
Client: Entranco Inc. for Bureau of Land Management (BLM)
Status: Completed

Ryan Dike is an approximately six-mile long earthen dike on the southwest side of the San Simon River, approximately 10 miles northeast of Bowie, Arizona. Ryan Dike was constructed by the U.S. Bureau of Land Management (BLM) in the early 1970s with the main objective of controlling the erosion of the banks of the San Simon…

La Cañada Soil Nail Wall

Location: Oro Valley (Tucson), AZ
Client: Town of Oro Valley
Status: Completed

Prepared performance specifications and reviewed third party soil nail wall designs on behalf of the Town of Oro Valley for a retaining wall along La Cañada drive near Dutton Place. Provided training to inspectors and construction oversight. Setup and monitoring of the data from inclinometers. Significant modifications to the soil nail wall were needed when…

Cortaro Road Soil Nail Walls

Location: Marana, AZ
Client: ADOT
Status: Completed

Performed design and post-design services for the widening of the Cortaro Rd. underneath I-10 by cutting into the embankment slope between the abutment and the pier and using soil nail retaining wall to stabilize the slopes.

Ajo Drainage Improvements

Location: Tucson, AZ
Client: Pima County Regional Flood Control District
Status: Completed

After extensive damage from a flood in 2003, Pima County embarked upon several drainage improvement projects. NCSG performed seismic refraction surveys and soil borings to determine excavatability for potential channel modifications at one location, and a detention basin at another site. Detailed seepage analysis were also performed to evaluate the drawdown rate of impounded water…

US 191: Guthrie Bridge

Location: Greenlee County, AZ
Client: ADOT
Status: Completed

The Arizona Department of Transportation (ADOT) replaced the Guthrie Bridge that takes US 191 over the Gila River in Greenlee County, Arizona. The new bridge is located 200- to 400-ft east of the previous Guthrie Bridge. The new bridge structure was designed as an 8-span bridge with a total length of 1,083-ft. the highest column…

I17 Widening: Phoenix to Black Canyon City

Location: Phoenix, AZ
Client: ADOT
Status: Completed

The Arizona Department of Transportation (ADOT) is widening the existing Interstate 17 (I17) between Downtown Phoenix and Black Canyon City. The first phase of the project called for widening of I17 between SR 101L and Carefree Highway. ADOT retained Parsons Brinkerhoff (PB) to prepare the design for the 30% stage. NCSG performed the geotechnical investigations…

University of Arizona Science Center

Location: Tucson, AZ
Client: University of Arizona
Status: Concept Level Study

For a concept level study, the University of Arizona (UA) contracted with NCSG to provide geotechnical recommendations for one of the most unique structures that was planned in Tucson or the Southwest. As a centerpiece of Tucson’s extensive Rio Nuevo downtown redevelopment plan, the UA considered development of a Science Center facility that would be…