Yuma, AZ

GCE performed the construction as the Prime contractor for several task orders under this POCA Indefinite Delivery/Indefinite Quantity Contract, including:

• PGSS Aerostat Pad, Yuma Proving Ground (YPG), Yuma, AZ. GCE was contracted to relocate the Persistent Ground Surveillance Systems (PGSS) Aerostat site from North Cibola Alpha Pad to South Cibola West II Pad for Product Development Aerostat Persistent Surveillance Systems--Tethered consolidation effort of PGSS and Persistent Threat Detection system (PTDS). This project was developed to give additional space for the PGSS and PTDS test sites. The new location was graded so water would flow to the existing washes and drainage areas, and aggregate base course (ABC) was placed to build a solid base for the equipment. The new site required approximately 1 acre of clear and grub earthwork to accommodate mooring of a 24-meter long aerostat and Rapid Aerostat Initial Deployment (RAID)/PGSS tower.
• Repair Elevated Water Towers at YPG, Yuma, AZ. GCE was awarded the task order to complete the repair and rehabilitation of six carbon steel water storage tanks: two 145,000-gallon capacity ground-level fire suppression water storage tanks, one 50,000-gallon capacity ground-level raw water storage tank, one 50,000-gallon capacity ground-level potable water tank, one 500,000-gallon capacity ground-level potable water storage tank, and one 5,000-gallon capacity horizontal hydropneumatic tank.
  The project consisted of various combinations of repair and rehabilitation measures, including replacement of existing impressed-current cathodic protection systems, replacement of existing sacrificial anode cathodic protection systems, replacement of failed tank floors, repair or replacement of existing liquid level indicators, interior blast and recoating with 100% solids epoxy coating system, repair or replacement of existing corroded structural components, exterior touch-up with two-coat epoxy/polyurethane coating system, and repairs to existing tank appurtenances. The project required sampling, testing, and analysis of interior and exterior finishes for the presence of lead-based paint. Spot lead abatement and hazardous waste disposal was necessary to complete the repairs. Temporary water storage, bypass piping, and final cleaning and disinfection of potable water tanks were also required. GCE strictly adhered to the project schedule since it was of utmost importance to complete the project during months of low water use.
• Add Left Turn Lane, Imperial Dam Road, YPG, Yuma, AZ. On this design/build task order, GCE was responsible the design and construction of a new 1,500 linear feet left turn lane on Imperial Dam Road at the YPG. The purpose of the project was to alleviate traffic concerns caused by a new visitor center built to serve as a central location to obtain badges for base access, as well as for tourists visiting the Wahner Brook Memorial Site.
  Once GCE completed the design process and prior to beginning field construction activities, GCE prepared all planning documents including the Accident Prevention Plan, Quality Control Plan, Environmental Protection Plan, Storm water Pollution Prevention Plan, and Traffic Control Plan. Our Superintendent and Quality Control personnel prepared the project schedule using Microsoft Project, and all construction submittals. The Site Safety and Health Officer conducted daily safety briefings and we provided daily and weekly reports to the USACE.
  GCE self-performed the demolition, subgrade preparation, grading, compaction, and ABC placement. To begin construction, the traffic control was put in place per our plans to ensure continued access throughout construction of this heavily used main entrance road to YPG. Our in-house surveyors performed construction staking for the project. Once the initial staking was complete, our crews sawcut the edge of the north side of the existing roadway to ensure proper abutment to the existing pavement. Excess soil was removed with our 613C Scraper and stockpiled on-site. The roadbed was scarified and moisture conditioned using our 672 GP Grader equipped with TopCon GPS System and our 2000-gallon water truck. Compaction was established with our CAT CW14 Rubber Tire Roller. Once subgrade moisture and compaction were established, 11 inches of ABC was installed in two 4-inch lifts and one 3-inch lift to meet compaction requirements on the roadway and shoulders. For the asphalt placement we solicited bids from three local subcontractors to obtain the best value for the government (Note: GCE has since acquired the equipment to do this in-house). The project was completed with striping and signage installation in accordance with the design criteria. Upon completion of the project GCE completed as-builts and provided a written warranty to the government.