As the Stormwater Drainage consultants for Washington State Department of Transportation (WSDOT), we designed the stormwater drainage infrastructural systems and prepared the Hydraulic Report for the $48 million St. Johns Road Interchange Design Project and the proposed 3.6 billion dollars 12-lane Columbia River Crossing Road and Bridge Project. We used several hydrologic models in the analysis and design of the infrastructural system in this project. As part of institutional development and capacity building effort, we trained & supervised WSDOT staffs in highway stormwater drainage design techniques and procedures to save the department of consultant fees ($100,000+) for their highway design projects.

As project consultants for California Department of Transportation (CALTRANS), we developed methodologies for soils investigations and permeability testing for the Interstate 5 Corridor Best Management Practices (BMP) Infrastructural Selection Project. Prepared and presented training on soil hydraulic conductivity testing procedures for CALTRANS staff and their local contractors involved in the project. As part of the capacity building effort, in this project, we provided on-going technical support and management for 3 years.

 As consultants to the Saudi Arabian Government, we conducted soils investigations to determine the extent of soil compaction on the Saudi Arabian desert (near the Kuwait and Iraq border because of the Allied Forces military activities) and coordinated soil compaction data to prepare accurate construction quantity estimates and bid package for the desert restoration of the Gulf War Remediation Project.

As the environmental project management consultants for Tidewater Barge Lines (TBL) in Vancouver, Washington, we investigated and analysed sources of stormwater pollutants from their 12-acre facility, researched, developed, and evaluated BMP infrastructural design alternatives to control stormwater runoff pollutants from the facility to meet National Pollutant Discharge Elimination System (NPDES) permit requirements. Designed and implemented selected natural treatment infrastructural BMP systems for TBL to cost-effectively meet their NPDES permit requirements

We have over 25 years of extensive and progressive experience as Lead Geotechnical Field/Design and Project Managers for feasibility studies, planning and executing subsurface explorations with rock testing and advanced lab testing, design and construction load testing for specialty deep foundations and ground improvements for large-scale highway and railway infrastructure and transportation systems for both public and private sectors such as Federal Highway Administration (FHWA), NPS, and several State Department of Transportation (CT, NY, MD, VA, DC, SC, NC, FL) and counties.

We have successfully completed major projects via planning, Baseline Geotechnical Engineering Reports, Foundation Design Reports, Value Engineering and Constructability reviews.

In addition, we have advanced capabilities to prepare site-specific contract documents; develop special provisions and specifications; and provide foundation construction quality control/quality assurance.

With expertise in structural, seismic, and geotechnical engineering, we bring unique insights into complex ground and foundation problems; and by integrating geo-construction knowledge and experience into the design process has proved invaluable in developing creative and value-engineered solutions for Design-Build, Design-bid-build and PPP projects. 

Geotechnical Project Engineer for a 5-year design effort providing geotechnical engineering feasibility and to final design investigations, subsurface assessment, foundation load testing for this $300-million 14-span triple box segmental-concrete girder bridge replacement project carrying I-95 over the flood plains of the Housatonic River.

The new 0.6-mile by 140-ft wide bridge is supported by single cast-in-place pier columns extending up from mono-drilled shaft foundations under each girder.

Associated structures included 134-ft wide by 0.8-mile-long roadways, retaining walls, stormwater retention ponds and infiltration galleries. We designed and managed geotechnical subsurface explorations program consisting of 50 borings with rock coring within the river; and 100 probes to locate buried obstructions in the vicinity of the of the existing pier foundations and evaluate their impact on demolition and construction.

Major site issues included highly variable depths (6 to 90 ft) to top of Schist bedrock; deep deposits of weak organic soils; liquefiable soils and associated down drag effects; and scour susceptibility of the adjacent Devon Bridge with predicted scour depths of 12 to 40 feet for 100-year design flood and 500-year check storm events; in-stream construction with tidal effects and storm surge; construction adjacent to existing bridge structures and the presence of buried obstructions in the vicinity of existing piled foundations and impact on demolition and construction; environmental control of contaminated soil and water.

Foundation design was performed in accordance with AASHTO LRFD requirements to satisfy structural loadings and site constraints. We developed and submitted Geotechnical data/design reports, deep foundation load testing reports; and structure soils reports for the bridges and highway infrastructure.

We also developed special provisions for foundation rock socket installations.

Senior Geotechnical Engineer.

We performed subsurface evaluations, developed design parameters for shallow and deep pile foundations for this large-scale highway infrastructure project consisting of seven bridges, six access ramps, miles of noise barrier structures and retaining walls: and several stormwater management facilities.

We provided geo-construction quality assurance/quality control services by reviewing contractor’s pile load testing data; geotechnical instrumentation and monitoring data for existing high walls; and as-built plans.

We investigated ground subsidence and pond slope failures adjacent to I-95 mainlines including.  Investigations included determining the boundaries of the slope instability, assessing causes of slides, modeling failure trajectories and mechanisms of ground movements associated with the sensitive soils. We developed slope stabilization details and provided revisions in Contract Document

Geotechnical Manager.

Project involved design and developing construction documents for a new 375-foot long, five-span, pre-stressed concrete beam bridge over Boundary Channel in Arlington County in Virginia and the District of Columbia.

We designed and implemented in-stream subsurface exploration and specialty lab testing program to determine soil overburden and bedrock characteristics.

We performed site-specific seismic classification, and deep foundation analysis and design for mono-drilled shaft foundations with rock sockets to depth between 40 and 90 feet and accounting seismic, river scour and down drag loads per AASHTO LRFD requirements.

Due to the presence of about 70-ft thick deposits of compressive soft elastic and organic silts at the bridge approach embankments, we recommended ground stabilization system using high strength geotextile subgrade stabilization to mitigate anticipated long-term settlements and instability. Construction documents included plans and specifications for Geotechnical Instrumentation and Monitoring Program.

Manged a $4 million Geotechnical Engineering Contract by providing subsurface and pavement investigations and site characterization, foundations and pavement evaluations, instrumental and monitoring program for design and construction of an 18-mile highway and state roadways with grade-separated MD24 over MD-924 bridge overpass with mechanically Stabilized Earth walls, widening and rehabilitation of existing MD24 over I-95 Bridge, roadway improvements and stowmwater management facilities.

Senior Geotechnical Engineer.

Provided Value engineering design services including drilled shaft and rock socket deep foundations for the 10-span (89-ft by 1,126-foot long) superstructure consisting of a cast-in-place deck on AASHTO 72-inch Modified Bulb-T Beams over a levee system.

We supervised and coordinated the efforts of the value engineering team to provide revisions for substructures supported by drilled shaft and rock socket deep foundations.  Our design efforts led to a decrease in the foundation sizes and resulted in reducing rock drilling quantities and afforded subsequent accelerated construction of substructures saving the client more than $2 million.

We also provided specialty geotechnical construction inspections for stabilization of the levee slopes and riprap armouring, and pavement subgrade improvements.

(2017 ACEC Engineering Excellence Grand Award Winner & 2017 OPAL Award).

Geotechnical Project Engineer for a 5-year design effort for the $555-million bridge replacement project consisting of a new 10-lane Extradosed Bridge (hybrid bridge with structural characteristics of steel cable-stayed and concrete girder bridge) carrying 0.9-mile of Interstate-95 traffic across the Quinnipiac River, at a height of 150 feet and a clearance 60 feet above the main harbor.

The bridge’s unique structure of both steel and concrete is well suited for the 515-foot center span and provides a unique signature for this harbor crossing.

Associated structures and facilities included several approach ramp bridges, roadway embankments, five replacement bridges, retaining walls, and underground drainage facilities.

As the Lead Geotechnical Consultant, we managed the $1-million subsurface exploration program consisting of deep-water borings and rock coring, in-situ testing (CPT soundings), test pits, and specialty laboratory testing; and foundation testing.

AASHTO LRFD foundation analysis required geo-statistical evaluations of sandstone bedrock data and performed liquefaction analyses for a 2-level seismic design (475-year and 2,500-year earthquake events).

We performed extensive soil-structure foundation analyses and modelling in coordination with the Structural Engineers; and developed design parameters for mixed foundations and ground improvement systems including rock-socketed drilled shafts and driven piles to satisfy the effects of weak and liquefiable soils, riverbed scouring, corrosion, and deep stream foundation construction challenges.

We developed and submitted Geotechnical data/design reports, deep foundation load testing reports; and structure soils reports for the bridges and highway infrastructure.