ABOUT TEAM AWARDS SERVICES PROJECTS SUBCONTRACTORS CAREERS CONTACT I-5 Sinkhole in Tracy Project Description: Caltrans Maintenance crews discovered a 3′ diameter depression on Interstate 5 in Tracy. Upon the discovery, Bay Cities Paving & Grading was called to the scene to further investigate the cause of the depression. During the investigation it was determined that a 35′ deep sinkhole had formed, which caused the California Highway Patrol and Caltrans to close the entire NB direction of I-5. Bay Cities was then asked to perform an Emergency Contract with the state to excavate to the bottom of the sinkhole, remove the 40 year old abandoned irrigation pipeline that caved in, and backfill back to finish grade. While excavating in the NB direction it was discovered that the irrigation pipe had failed across the entire freeway, which resulted in the closure of the SB direction of I-5 as well. Bay Cities put all hands on deck and worked around the clock to repair the sinkhole and ensure that I-5 was structurally sound before opening to motorists. More info about the I-5 Sinkhole in Tracy: Sinkhole Shuts Down All NB I-5 Lanes in San Joaquin County Sinkhole Forces Extension of I-5 Closure in San Joaquin Co. Sinkhole Shuts Down All Lanes On I-5 Northbound Freeway In Tracy COMPANY Home About Team Awards Services Projects Subcontractors Careers Contact CAPABILITIES Paving Grading & Excavating Emergency Work Underground Utilities Precast Concrete Slab Installation Demolition Construction Management CONTACT 925.687.6666 info@baycities.us CONNECT Bay Cities Paving & Grading Inc. | 1450 Civic Ct. Bldg B #400 Concord, California 94520 | Employees | site by bizdetail

ABOUT TEAM AWARDS SERVICES PROJECTS SUBCONTRACTORS CAREERS CONTACT Highway 880 Job #3496 Job Description: This was a 6 year long project with MCM construction (GC) at the 16th avenue over crossing on HWY 880 in Oakland. Traffic staging and detours were very challenging, which utilized 8 different stages over the 6 year span. In addition, roughly 40% of the project was constructed at night which added to the difficulty. Additional Information: Key aspect: Had to put surcharges. Installed wick drains 80-100 ft deep into existing soil then put 20′ high surcharges of dirt on top of them to squeeze all of the water out of the grade below. Each surcharge period lasted a minimum of 6 months per stage. COMPANY Home About Team Awards Services Projects Subcontractors Careers Contact CAPABILITIES Paving Grading & Excavating Emergency Work Underground Utilities Precast Concrete Slab Installation Demolition Construction Management CONTACT 925.687.6666 info@baycities.us CONNECT Bay Cities Paving & Grading Inc. | 1450 Civic Ct. Bldg B #400 Concord, California 94520 | Employees | site by bizdetail