San Dimas Loop
Geotechnical Investigation for Pavement Distress within the San Dimas Loop (2021-2022) The project involves the design of the geotechnical repair for the San Dimas Loop. The pavement surface within a segment of the San Dimas Loop/Avenue adjacent to a steep descending slope had some cracks and signs of settlement and/or lateral movement. GAI performed a…
4910 Hampstead Road
Geotechnical Investigation for Pavement Failure at 4910 Hampstead Road (2022) Hampstead Road is a two-way hillside street with ascending and descending slopes. Within the vicinity of 4190 Hampstead Road, the pavement had significant cracking with definite signs of settlement and/or lateral movement. The purpose of the project was to evaluate the stability of the cut-fill…
Colima Road Pavement Assessment
Geotechnical and Pavement Investigation for Colima Road Pavement Assessment (2022) The City of Whittier considered removing and reconstructing the existing pavement section along Colima Road between Lambert Road and Mar Vista Street in Whittier, California. GAI performed a geotechnical and pavement investigation to evaluate the necessity of reworking the subgrade and provided a report that…
4th Street Alley Rehabilitation Project
Geotechnical Investigation for 4th Street Alley Rehabilitation Project (2023) The City of San Bernardino intended to rehabilitate the existing alley on 479 West 4th Street in San Bernardino, California. The proposed rehabilitation included removing and replacing the existing pavement with pavers, installation of large bike racks, and other beautification works. GAI provided a limited geotechnical…
Cordova Complete Street Project
Geotechnical Monitoring and Materials Testing and Inspection Services for the Cordova Complete Street Project (2023) GAI provided geotechnical and materials inspection and testing for this street improvement project. Our services included providing field monitoring, testing and inspection for the street pavement works, performing laboratory tests on subgrade, base and asphalt materials, and preparing and submitting…
Materials Testing and Conditions Assessment Report
Materials Testing and Conditions Assessment Report for Los Angeles County (2022-2023) The County intended to structurally retrofit the existing Civic Center Central Plant located in the City of Los Angeles. The planned future retrofit work will include seismic and structural upgrades and building strengthening. The Central Plant building is a one-story steel and concrete structure…
East Bonita Avenue
Geotechnical Pavement Engineering Report for East Bonita Avenue Pavement Rehabilitation (2023) The project involved the pavement rehabilitation of Bonita Avenue between San Dimas Avenue and the eastern City limits approximately 600 feet east of San Dimas Canyon Road in San Dimas, California. The segment of Bonita Avenue within the project limits is approximately 4,700 feet…
Trunk Line South
Geotechnical Instrumentation and Monitoring for Trunk Line South – Unit 4 / Phase 2 (2015-2016) The purpose of the project was to monitor the displacement of the deep tunnel shafts’ walls and the settlement of the underground tunnel due to the construction of a new sewer line. GAI provided geotechnical instrumentation and monitoring services for…
Queen Mary Waterfront Development
Geotechnical Investigation for Queen Mary Waterfront Development at Port of Long Beach (2016-2017) In January 2016, the City of Long Beach approved a 66-year lease contract for the Urban Commons, a Los Angeles-based investment company, to take over the master lease for the Queen Mary and about 43 acres of surrounding waterfront land. Urban Commons…
Recycled Water Pipeline System Extension
Geotechnical Engineering Study for Recycled Water Pipeline System Extension for Various Streets (2017) The project included an extension of a proposed recycled water pipeline in six different streets within the City of South Gate. The total length of the project was approximately 22,500 feet, about 4.3 miles. The client for this project was CBMWD, and…
Quadrant III Water Main Replacement
Geotechnical Investigation for Quadrant III Water Main Replacement at Various Locations (2018) The project included the design and construction of the Quadrant III Water Main Replacement comprising 13 segments. The project required the replacement of the 8-inch diameter Class 200 PVC piping, located approximately 4 to 5 feet below the ground surface. The length of…
Hyperion Water Reclamation Plant
Geotechnical Investigation for Advanced Water Purification Facility for the Hyperion Water Reclamation Plant (HWRP) (2019-2020) HWRP is located within the City of Playa Del Rey, California, and is the largest facility of its kind in California. The Plant included several below-grade and partially below-grade liquid retaining structures, pump stations, and a below-grade pipeline system. In…
Olympic Well Field Restoration and Arcadia Water Treatment Plant
Geotechnical Services for Olympic Well Field Restoration and Arcadia Water Treatment Plant Expansion (2020-2021) The project involved water treatment plant upgrades at Arcadia Water Treatment Plant, located in the City of Santa Monica. The modifications and upgrades included an extension to the existing RO Building, a new chemical storage area on the east side of…
San Fernando Groundwater Basin Remediation
Geotechnical and Geohazard Investigation of Treatment Facilities for the San Fernando Groundwater Basin Remediation, a Progressive Design-Build Project (2019-2022) LADWP selected Kiewit Infrastructure West Co. to provide progressive Design-Build services for the San Fernando Groundwater Basin (SFB) Remediation Project. The project included the design and construction of treatment facilities and other improvements at two plant…
Solar Shade Structures
Geotechnical Investigation and Materials Testing and Inspection for Construction of Solar Shade Structures (2014) The project included the proposed development and construction of two sets of PV array structures. In 2014, GAI performed a geotechnical investigation. Afterward, and during construction, GAI provided geotechnical materials testing and performed continuous and periodic inspections in compliance with the…
Yorba Power Substation
Geotechnical Site Investigation for Yorba Power Substation (2015) The project site was in the City of Anaheim, California, and expanded over two adjacent properties with the addresses of 5030 and 4952 La Palma Avenue. To upgrade the 12KV Switchgear and Control Building, the proposed developments included the construction of three new poles, many switchgear, and…
Photovoltaic (PV) Solar Energy System Projects
Various Schools, Geotechnical Investigation, and Seismic Hazard Evaluation for Photovoltaic (PV) Solar Energy System Projects (2014-2016) The GAI team has completed geotechnical and geohazard investigations for sets of PV array parking shade structures for numerous school sites within Southern California. The following school districts are among the ones our team performed field investigation, laboratory testing,…
Redondo Beach Unified School District
Geotechnical Investigation, Materials Testing and Inspection for District-Wide New Construction Projects at 9 Different Campuses (2015) The project consisted of new construction at nine different (9) campuses within the Redondo Beach Unified School District. Some of the improvements at the Redondo Union High School included the construction of a new student services building, gymnasium, swimming…
Lennox School District
Geotechnical Investigation and Soils and Materials Testing and Inspection for Construction of New Classroom Buildings at Four Different Campuses (2017) In early 2017, Lennox School District selected GAI as their geotechnical engineering consultant and DSA-approved testing and inspection laboratory to conduct a geotechnical investigation and during construction testing and inspection for four new one and…
Wiseburn Unified School District
Geotechnical Investigation, Materials Testing and Inspection for the Renovation and Conversion of a 4-Story Office Building at Da Vinci High School (2015-2018/Phase I; 2016-2018/Phase II) This unique and complex high school renovation project was completed in two phases. The proposed development for Phase I included the renovation of an existing four-story office building, to be…
Palos Verdes Peninsula Unified School District
Geotechnical Investigation, Soils and Materials Testing and Inspection for New Construction of a Class Building at Peninsula High School (2019) Palos Verdes Peninsula High School in Rolling Hills Estates, California proposed upgrades to its campus by adding a two-story building with six classrooms and a weight room. For the design phase, GAI performed site reconnaissance…
Bonita Unified School District
Geotechnical Investigation, and Soils and Materials Inspection and Testing Services for the District Office Renovation and Expansion Project (2018-2019) The project consisted of the renovation of the district building and the construction of additions to the building. The work included the demolition and replacement of flooring, walls, asphalt, and concrete for the construction of the…
Norwalk-La Mirada Unified School District
Materials Testing and Special Inspection Services for the La Mirada High School New Football Stadium Project (2020) The district’s construction program included new stadiums, new construction projects, modernization/reconstruction, and alterations. GAI provided geotechnical engineering consulting services for the La Mirada High School New Football Stadium Project. GAI conducted a comprehensive geotechnical and geohazard investigation and…
Long Beach Unified School District
Soils and Materials Testing and Inspection for the Lakewood High School Track and Field (2021) The Lakewood High School Track and Field Project consisted of the replacement of the existing track with an all-weather track surface, the replacement of the electronic scoreboard, the reconstruction of the existing bleachers to create accessible seating, and the replacement…
La Canada Unified School District
Geotechnical and Geohazard Investigation and Materials Testing and Inspection for New Outdoor Pool Facility and South Campus Improvement Project for La Canada High School (2020-2022) The project included the following improvements to the south campus of La Canada High School: a new outdoor swimming pool with an adjacent restroom/locker room/office building, new basketball courts to…
Irvine Unified School District
Geotechnical Investigation Testing for Bond Measure E Culverdale Elementary School Expansion Project (2022) The project included the construction of a new one-story Multi-Purpose Room (MPR) building and expanded food service/kitchen space, reconfiguration of the existing MPR into Student Services Space, and improvements to arrival and wayfinding. The new MPR building will have an area of…
El Segundo Unified School District
Geotechnical and Geohazard Investigation and Soils and Materials Testing and Inspection for New Gymnasium and Site Developments at El Segundo Middle School (2020-2023) The project included the design and construction of a new 14,000 square feet footprint gymnasium building, new basketball courts, new parking areas, retaining walls, and bleachers at the El Segundo Middle School.…
East Whittier City School District
Geotechnical and Geohazard Investigation and Soils and Materials Testing and Inspection Services for Leffingwell Elementary School Admin Building Renovation (2021-2023) The project involved the renovation of the Administration Building with associated site improvements. The project included the construction of additions to the building with areas of approximately 325 and 335 square feet for the west…
Centinela Valley Unified School District
Geotechnical and Geohazard Investigation, and Soils and Materials Testing and Inspection for Modernization of Leuzinger High School Athletic Fields and Facilities (2020-2023) The project involved the renovation/reconstruction/modernization of the athletic fields and facilities at Leuzinger High School for the Centinela Valley Union High School District, which included synthetic turfs for the ballfields, football field, running…
North Orange County Community College District
Geotechnical Investigation and Soils and Materials Testing and Inspection for Fullerton College Chapman Newell Site (2018-Ongoing) The project includes the construction of a one- to two-story instructional building in the northern half of the site and a parking area in the southern half of the Chapman Newell Site. The instructional building will have a footprint…
Los Angeles Unified School District
Lincoln High School Modernization Project, Package 1 (2022-Ongoing) The project includes the modernization of Lincoln High School with the construction of new retaining walls, sidewalks, ramps, and post-installed anchors. GAI’s scope of work includes during construction materials testing and inspection, laboratory tests on concrete and steel, and preparing and submitting daily inspection reports. LOCATION: Los…
Downey Unified School District
Geotechnical Investigation and Soils and Materials Inspection and Testing Services for Stauffer Middle School Classroom Buildings (2021-2023) The project included the construction of two new two-story classroom buildings, with an area of approximately 4,490 and 3,850 square feet for the northeast building and the southwest building, respectively. The proposed new classroom buildings are located within…
Buena Park School District
Geotechnical Engineering Investigation and Geohazard Evaluation and Geotechnical Monitoring for Proposed Beatty Middle School Locker Building (2020-Ongoing) The project included constructing a locker room building of approximately 5,400 square feet. The new one-story building replaced five portable classroom buildings located at the west segment of the campus. Other improvements included concrete flatwork and utility lines.…
Rosemead Boulevard
Resident Inspector Services for Rosemead Boulevard Safety Enhancement and Beautification (2012-2014) The project consisted of over approximately 2 miles of streetscape enhancements on Rosemead Boulevard in the City of Temple City, California. It provided improvements to the right-of-way safety and aesthetics from the southern city limit within the City of Rosemead at the UPRR railroad…
S. Eastern Avenue
Pavement Evaluation, Monitoring, and Inspection for Rehabilitation of S. Eastern Avenue (2014-2015) Eastern Avenue is a major corridor in the City of Commerce, with heavy vehicle and truck traffic connecting to the I-5 Freeway. The existing pavement had faced some major distress and the city intended to replace/overlay the pavement with proper methods. By using…
Washington Boulevard
Pavement Engineering, Field Inspection and Testing for Washington Boulevard Rehabilitation (2016-2018) Washington Boulevard is a major east-west corridor that passes through the City of Commerce located within the Gateway Cities region. It serves as one of the significant connectors between the I-710 and I-5 Freeways carrying approximately 35,000 vehicles per day, 25% of that being…
Cienega Avenue
Value Engineering for Cienega Avenue Pavement Rehabilitation (2017-2018) The City of San Dimas planned to rehabilitate 2.2 miles of pavement for Cienega Ave. between Lone Hill Ave. and Arrow Hwy. The previous pavement rehabilitation study/design recommended Full Depth Reclamation of the existing pavement. GAI performed geotechnical investigation, field sampling, laboratory testing, and reviewing the previous…
Avenida Entrada
Geotechnical Investigation and Field Observation and Testing for Avenida Entrada et al Street Improvement Project (2019) The project rehabilitated the residential areas of Avenida Entrada between Paseo Corrido and Calle Linda and involved full-depth removal and reconstruction of the entire asphalt concrete and base layer, reworking of the subgrade soils, and placing back well-compacted layers…
Ontario Parking Structure
Geotechnical Engineering Services for a Parking Structure at the Corner of C Street and Lemon Avenue (2020) The City of Ontario intended to build a new 5 to 6-story above-ground parking structure with associated improvements. The new parking structure has a footprint area of nearly 15,000 square feet and was designed per the 2019 California…
El Prado Road Pavement Reconstruction
Pavement Evaluation, Geotechnical and Materials Special Inspection for El Prado Road Pavement Reconstruction Between Kimball Avenue & Central Avenue (2020) The project involved the reconstruction of the pavement section for El Prado Rd. between Kimball Ave. and Central Ave., and included pulverizing the existing asphalt and base layers, mixing the pulverized materials with cement, compacting,…
Uptown Whittier Parking Structure
Geotechnical and During Construction Materials Testing and Inspection Services for Uptown Whittier Parking Structure (2018-2020) The City of Whitter constructed a 4-story parking structure in Uptown Whittier consisting of ADA ramps, stairs, two elevators, and public restrooms. GAI was the Geotechnical Engineer of Record (GEOR) for this project. Our scope of services included providing geotechnical…
Grand Avenue
Pavement Evaluation and Recommendation for Grand Avenue (2020) The city rehabilitated Grand Avenue, a high-traffic volume principal arterial street, between Freeway 71 on-ramp and Pipeline Avenue. The project length was approximately 2,700 feet. The segment of Grand Avenue for this project comprises four lanes in each direction. GAI provided a pavement investigation to evaluate the…
Federal Project Aviation Experience
The GAI team is highly experienced in geotechnical federal projects including buildings and infrastructures, and aviation/airport projects. During the past 10 years the GAI team has performed several projects for NAVFAC in California. GAI is one of the selected nation-wide on-call geotechnical firms by The Department of Interior Services to provide geotechnical services in multiple…
LAX Underground StormTrap Detention Facility
Geotechnical Investigation for the Underground StormTrap Detention Facility (2016) The Underground StormTrap Detention Facility has an approximate footprint of about 55,000 square feet. When the facility was under construction in late 2015, unfiltered stormwater entered the facility, and this intrusion caused fine particle sedimentation. Concerns were raised by LAWA about the infiltration capacity of the…
Qantas Hangar Construction
Geotechnical Grading, Monitoring, and Testing for Qantas Hangar Construction (2015-2017) The project consisted of massive grading operations for a large area located on the west end of the airport and grading for a large-span hangar for Qantas Airline, with a footprint of about 120,000 square feet. The grading work included raising the existing natural grade…
Delta Air Lines
Geotechnical Inspection and Testing for Delta Air Lines (2019-2020) The project included a maintenance hangar and associated pavements for Delta. GAI provided geotechnical grading deputy inspection services for this project. GAI also performed geotechnical testing and inspection services for various airport projects on an as-needed basis. LOCATION: Los Angeles, CA AGENCY/CLIENT: Los Angeles World Airports…
Automated People Mover (APM) Project
Pavement Engineering for the Intermodal Transportation Facility West (ITF West) Landside Access Modernization Program Automated People Mover (APM) Project (2018-2020) This mega-sized pavement project included two Intermodal Transportation Facility (ITF) rotaries and parking lots for commercial vehicles, as well as numerous roadway constructions within and up to two (2) miles east of the airport. GAI…
LAX TWDE Existing Bridge Structure
Geotechnical Services for the LAX TWDE Existing Bridge Structure (2022-2023) The project site is located east of LAX Terminal 1 at the intersection of World Way and Sky Way in Los Angeles, California. To enable the easterly extension of Taxiways D and E, the existing roadways and bridges must be demolished, including Sky Way Avenue…
Taxiways D and E Easterly Extension at LAX
Geotechnical Services for Taxiways D and E Easterly Extension at LAX (2022-2023) As part of the Airfield Improvement Program (AIP), Los Angeles World Airports (LAWA) intended to improve the new easterly extension of Taxiways D and E to serve the future Concourse 0 and the North Airfield. GAI provided geotechnical services for this project as…
Intersection Improvements
Preliminary Environmental Clearance and Preliminary Engineering Services for Intersection Improvements (2014) The Lakewood Boulevard/Alondra Boulevard, Bellflower Boulevard/Spring Street, and Lakewood Boulevard/Spring Street intersections were identified as Congestion Hot Spots by the I-605/SR-91/I-405 Technical Advisory Committee (TAC). GAI provided geotechnical engineering services for intersections 1, 7, and 48 in the cities of Long Beach, Bellflower, and…
Lakewood and Alondra Intersections
Preliminary Geotechnical Engineering, Initial Site Assessment (ISA), and Phase II Environmental Study for Lakewood and Alondra Intersections (Metro Hotspot Project) (2015) The project was defined as a Metro Hotspot project that included “Environmental Clearance and Preliminary Engineering Services” for Intersection Improvements in the Cities of Long Beach, Bellflower, and Paramount”. GAI provided geotechnical engineering and…
I-605/SR-60 Interchange Improvement Project
Geotechnical Services for PA/ED for I-605/SR-60 Interchange Improvement Project (2016-2017) The proposed improvements for the project were along I-605, from Telegraph Road to the I-10 interchange, and along SR-60, from Santa Anita Avenue to east of Turnbull Canyon Road. LA Metro and the Gateway Cities Council of Government (GCCOG) prepared a Project Study Report –…
I-15 and SR-74 Interchange Improvement
Geotechnical Engineering Services for PA/ED for I-15 and SR-74 Interchange Improvement (2017) The interchange was approximately 1.5 miles Southerly of Nichols Road Interchange and 1.3 miles Northerly of Main Street Interchange. SR-74 was designated as an 8-lane urban arterial, serving the City of Lake Elsinore, Canyon Lake, and unincorporated areas of the County of Riverside.…
I-605/South Street Improvement Project
Geotechnical Services for PA/ED and PS&E for I-605/South Street Improvement Project (2017-2019) The project was funded as part of the I-605 Hot Spots in Measure R to reduce the existing and forecasted congestion. The project provided additional merging distance/space for vehicles entering from both WB and EB SR-91 onto SB I-605 while minimizing Right-of-Way (ROW),…
SR-57/SR-60 Confluence Project
Geotechnical Investigation for PS&E for SR-57/SR-60 Confluence Project (2018-2020) The project spanned 2.5 miles within the vicinity of the SR-57 and SR-60 interchange (also known as the SR-57/SR-60 Confluence). The developments included constructing a new bypass ramp to Grand Avenue from eastbound (EB) SR-60, reconfiguring the south half of the Grand Avenue interchange from a…
Torrance Transit Park and Ride Regional Terminal
Geotechnical Services for Torrance Transit Park and Ride Regional Terminal, Phase I-Rough Grading (Phase 1: 2016-2017; Phase 2: 2018-2022) The City of Torrance constructed a Transit Park and Ride Regional Terminal to create a strategically located, multi-modal facility that met the regional needs of South Bay residents. Phase I of the project included performing rough…
SR-91 from Atlantic Avenue to Cherry Avenue Improvement Project
Geotechnical Services for PA/ED and PS&E for SR-91 from Atlantic Avenue to Cherry Avenue Improvement Project (2018-2022) LA Metro in cooperation with the Gateway Cities Council of Governments (GCCOG) and Caltrans District 7 advanced the development and implementation of the Eastbound State Route-91 Atlantic Ave. to Cherry Ave. Auxiliary Lane Improvement Project. The project study…
Redondo Beach South Bay Regional Intermodal Transit Center
Geotechnical and Materials Testing and Inspection for Redondo Beach South Bay Regional Intermodal Transit Center (2019-2022) The project involved the construction of a new transit center on Kingsdale Avenue which included the construction of a new transit building, bus bays, retaining walls, parking lot, and associated appurtenances. GAI provided during construction geotechnical and materials inspection…
Lynwood Intersection Improvements
Geotechnical Services for Lynwood Intersection Improvements PS&E (2021-2022) The project proposes to implement focused congestion mitigation measures with intersection improvements along Imperial Highway between State Street and Wright Road, providing congestion relief during peak hours. The congestion mitigation measures were determined during the Preliminary Engineering phase of the Project and include geometric improvements at four…
Willow Street Corridor Project
Geotechnical Services for Willow Street Corridor Project (2021-2022) The project included improvements to East Willow Street in the City of Signal Hill. These improvements are part of the Interstate 710 (I-710) Corridor Improvement Project Early Action Program. The goal of the project was to provide congestion relief on East Willow St. during peak hours by…
SR-91 Improvement Project
Geotechnical Services for PA/ED and PS&E of SR-91 from Central Avenue to Acacia Court Improvement Project (2020-2023) The LA Metro, in cooperation with the Caltrans District 7 and the Gateway Cities Council of Governments (GCCOG), advanced the development and implementation of State Route 91 between Acacia Court and Central Avenue in the City of Compton.…
I-405 Auxiliary Lane
Geotechnical Services for I-405 Auxiliary Lane PS&E (2021-2023) Caltrans, in cooperation with the LA Metro and the South Bay Cities Council of Governments, proposes the construction of a series of auxiliary lanes on both northbound/southbound Interstate 405 (I-405) from Artesia Boulevard to the I-405/interstate 105 (1-105) separation in the Cities of Torrance, Hawthorne, Redondo Beach,…
I-105 Express Lanes
Geotechnical Services for I-105 Express Lanes Segment 1 for PS&E Phase (2021-2023) The I-105 Express Lanes project improvement limits include I-105 from Imperial Highway (Hwy)/Sepulveda Boulevard Intersection (west of I-405) within the City of Los Angeles to Studebaker Road (east of I-605) within the City of Norwalk in Los Angeles County, California. GAI’s scope of…
Slauson Ave. and Atlantic Blvd. Congestion Relief
Geotechnical Pavement Engineering Services for PA/ED & PS&E Phases for Slauson Ave. and Atlantic Blvd. Congestion Relief Improvements (2022) The purpose of this project is to relieve congestion at the intersection of E. Slauson Avenue and Atlantic Boulevard within the City of Maywood. The scope involved widening the roadway to add right-turn pockets at eastbound…
I-10 Express Lane Extension
Geotechnical Services for I-10 Express Lane Extension PA/ED and CONOPS (2022-Ongoing) Los Angeles County Metropolitan Transportation Authority (Metro), in cooperation with Caltrans District 7, proposes to reduce High Occupancy Vehicle (HOV) degradation, improve mobility and provide multi-modal travel options on I-10 between Interstate 605 (I-605) and Los Angeles/San Bernardino County Line through increased HOV eligibility…
G-Line BRT
Geotechnical Services for G-Line BRT (2022-Ongoing) The LA Metro G-Line BRT project, a progressive design-build project is currently in the design and preconstruction phase. The project will upgrade the existing 18-mile line running through San Fernando Valley, and the project’s key elements include: Grade Separation and Aerial Station at Sepulveda Blvd Grade Separation and Aerial…
Rosecrans Avenue/Atlantic Avenue & Artesia Boulevard/Santa Fe Intersection
Geotechnical Services for Rosecrans Avenue/Atlantic Avenue & Artesia Boulevard/Santa Fe Intersection Improvements (2021-2023) The Los Angeles County Metropolitan Transportation Authority (LA Metro), in cooperation with the City of Compton, intends to improve Rosecrans Avenue/Atlantic Avenue and Artesia Boulevard/Santa Fe Avenue Intersections in the City of Compton and the County of Los Angeles. The proposed improvements…