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Be sure to visit our new Environmental and GeoForensics Division Web Sites!

GROUP DELTA EXPANDS INTO THE BAY AREA!

Fault Trench Investigation at 6230 Yucca Street

Group Delta is pleased to announce our expansion into the Bay Area! As of late last month, our new office is headed up by Associate Geologist Robert Blakely PG, PMP (pictured above). Rob has more than 12 years of experience in the environmental consulting and engineering industry and has managed a variety of construction, remediation, and geologic projects. We are excited to be able to provide a full range geotechnical and environmental services for projects in the Bay Area!

GROUP DELTA CLEARS FIRST SITE IN
HOLLYWOOD FAULT ZONE

Fault Trench Investigation at 6230 Yucca Street

Group Delta is currently working on fault investigations at multiple sites along the Hollywood Fault. We recently submitted our report on the first site located at 6230 Yucca Street to the City of Los Angeles for approval. At this site, after a 4-month long thorough investigation, no evidence of an active fault was found. For the full story and a unique look at this fault trench investigation from inside the fence click here.

 

METRO SELECTS THE SKANSKA-TRAYLOR TEAM FOR DESIGN AND CONSTRUCTION OF THE
REGIONAL CONNECTOR TRANSIT CORRIDOR PROJECT

Metro Regional Conector, Los Angeles

L.A. Metro awarded the contract to design and build the Regional Connector Transit Project be awarded to the joint venture of Skanska USA and Traylor Bros. The 1.9-mile underground light-rail system extends from the Metro Gold Line Little Tokyo/Arts District Station to the 7th Street/Metro Center Station in downtown Los Angeles, allowing passengers to transfer to Blue, Expo, Red and Purple Lines, bypassing Union Station. Group Delta will be providing geotechnical design support services to the Skanska-Traylor team for this project.

ARTIC'S ICONIC TERMINAL BEGINS TO TAKE SHAPE

diagrid steel shell of the new ARTIC terminal building

One of the most notable features of the Anaheim Regional Transportation Intermodal Center (ARTIC) currently under construction will be it's iconic Terminal Building. The building reaching 117-feet high with an approximate footprint of 48,000 square feet will be housed in a a diagrid steel shell structure (pictured above) and will feature the largest ETFE (Ethylene Tetra Fluoro Ethylene) roof expanse in North America.

Group Delta
is providing construction materials testing and inspection services during the construction of ARTIC. Some of the testing and inspections provided will include: rebar, concrete, forms, fireproofing, shop steel inspection, steel ultra-sonic testing, welding/bolting/field inspections, building inspection/MEP/HVAC. ARTIC is on schedule to be completed in late 2014.

A CONVENTIONAL WIN FOR GROUP DELTA!

Rendering of Proposed Anaheim Convention Center Expansion

Group Delta is proud to announce that our team, led by STV Inc, has been selected to manage the construction of the new Anaheim Convention Center Expansion. Group Delta will provide materials testing and inspection for the team.

The expansion project will include the design and construction of additional meeting/exhibit space and will connect to the existing facility. The project is estimated to cost $180 million and will be delivered using a design/build process which is currently at the short-list phase of selection.

I-210 GOLD LINE "ICONIC" BRIDGE SELECTED AS
BEST PROJECT FOR 2013

I-210 Iconic Gold Line Bridge at night

ENR California selected the I-210 Gold Line Bridge as the Best Highways/Bridges Project in Southern California in 2013! The landmark 584 foot long light rail transit (LRT) Gold Line Bridge over I-210 in the City of Arcadia was completed on-time and on-budget by the design-build team of Skanska USA/AECOM. Group Delta provided geotechnical engineering recommendations to the design-build team for this project.

The distinctive bridge is anchored by two, 25-foot ‘baskets’ and a serpentine main underbelly featuring casted grooves and hatch marks that simulate the patterns found on the Western Diamondback snake. The Foothill Extension Phase 2A is an 11.5-mile extension of the Metro Gold Line from Pasadena to Asuza.

GERALD DESMOND BRIDGE REPLACEMENT PROJECT
SUCCESSFUL LOAD TEST

O-cell Pile load test at Gerald Desmond Bridge

Group Delta recently designed and performed construction observation of a pile load test for the Gerald Desmond Bridge Replacement project. The test was performed on an 8.2 ft. (2.5 m) diameter, 173-ft long CIDH pile using the Osterberg Cell (O-cell) method for measuring skin friction and end bearing capacity. Strain gages were included at various depths to determine the distribution of the friction with depth. The pile base was post grouted after construction of the CIDH pile and prior to testing to increase the end bearing capacity. The O-cell was located at a height of 12 ft. above the tip of the pile and had a maximum load capacity of 18,000 kips and a maximum travel of 9 inches.

GERALD DESMOND BRIDGE REPLACEMENT PROJECT
SUCCESSFUL LOAD TEST (CONTINUED)

Chief Technical Officer Dr Kul Bhushan at Pile load test at Gerald Desmond Bridge
Group Delta's Chief Technical Officer Dr. Kul Bhushan (pictured above) is
Geotechnical Engineer of Record for the Gerald Desmond Bridge Replacement Project.

The pile load test was performed by jacking the lower part of the pile downward and measuring the skin friction in the 12 feet pile section below the O-cell plus the end bearing at the pile tip. The upwards load at the "O"cell location was resisted by the friction from the upper 161 feet of the pile. A maximum bidirectional O-cell load of about 11,000 kips was applied near the end of the test as the O-cell approached the limits of its travel. The pile was constructed and post-grouted by Shimmick Construction Company and the load test was conducted by Loaddtest, Inc. The test was monitored by Group Delta and Shimmick personnel.

EXPO PHASE 2 ON TRACK FOR COMPLETION BY 2015

Expo LRT Phase 2 Olympic Blvd Bridge
Construction of Expo II Light Rail over Olympic Blvd Bridge (image by Skanska-Rados>)

The Los Angeles Metropolitan Transportation Authority Expo Light Rail Phase 2 was about 45% complete by late July, and is on track to be completed by 2015. The existing Expo Line connects downtown Los Angeles to Culver City. Phase 2 of this project is a 6.6-mile westward extension of the Expo Line to Santa Monica. The segment includes seven major bridges, seven stations, and a railcar maintenance and parking facility.

Group Delta provided our geotechnical recommendations for the 6.6 mile guideway construction, including large and small diameter CIDH foundation analysis, seismic analysis, FLAC analysis for stress and deformation for buried utilities, recommendations for sound walls and retaining walls, and materials testing and inspection for the Kenter Canyon Storm Drain. We are also providing on-going design support during construction.

GROUP DELTA SAN DIEGO EARNS ISO/IEC 17025:2005 ACCREDITATION

Group Delta ISO-IEC 17025:2005 Certificate of Accreditation

Group Delta is pleased to announce that our San Diego laboratory has been awarded accreditation to the technical competence and quality assurance requirements of ISO/IEC 17025:2005 as determined by the Laboratory Accreditation Bureau (L-A-B). See our complete Scope of Accreditation.

 

groupdeltaenvironmental.com deltageoforensics.com

In January 2014, the California Geologic Survey released an updated preliminary review map of earthquake fault zones in the Hollywood Quadrangle. The map shows estimated traces of the Hollywood Fault running through downtown Hollywood (as seen in the video below).

The map, when finalized, will define a new earthquake hazard zone in Hollywood and would require most new construction projects within this zone to conduct a fault rupture investigation prior to construction permits being issued. Group Delta has a team of expert geologists and paleoseismologists who have decades of experience in locating faults within Alquist-Priolo Zones. See our page on fault investigations for more details.

 

 

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Group Delta Consultants, Inc.
32 Mauchly, Suite B, Irvine, CA 92618
370 Amapola Avenue, Suite 212, Torrance, CA 92618
9245 Activity Road, Suite 103, San Diego, CA 92126
1320 S. Simpson Circle, Anaheim, CA 92806
1035 S Milliken Ave, Suite G, Ontario, CA 91761
505 14th Street, Suite 900, Oakland, CA 94612