Marine Corps Air Station (MCAS) Yuma, AZ

GCE was subcontracted for this design/build project that consisted of the design and repair of four separate roadways that were at various stages of deterioration located at MCAS Yuma. The original award on this design/build contract included Shaw Avenue and Thomas Avenue. MCAS Yuma modified the contract to include two additional roadways: Missile Ordnance Road and Range Road.

Following GCE's completion of the design documents. GCE self-performed the topographic survey, SWPPP implementation, demolition, subgrade preparation, grading, compaction, and aggregate base course (ABC) placement for all four roadways that are included in this project.

• The first roadway was Shaw Avenue. GCE prepared traffic control plans for this 530-foot roadway as it was extremely important to maintain access throughout construction for this centrally located road. GCE began the design by utilizing pothole data to ascertain the best method of repair. Upon reviewing the data gathered, it was decided to leave the existing 4" of ABC in place and remove and replace the existing 3 inches of asphalt concrete (AC). A new 2% traverse slope was incorporated into the design to properly drain stormwater to existing concrete curbs. Striping plans were also prepared.
  GCE crews began improvements with demolition by saw-cutting the existing AC at each end and at a driveway location. Using our 950 GC loader, GCE removed the existing AC and transported to an offsite disposal facility. The subgrade was then graded using our 672GP grader to achieve proper slope. At that point, the AC pavement was placed by another subcontractor and GCE finished the project by raising all existing utility valves to finished grade.
• For Thomas Avenue, the data gathered indicated the need to completely reconstruct the 800-foot roadway. GCE prepared plans to show the complete removal of the existing AC and ABC pavement by pulverizing and reusing it as recycled ABC, followed by the placement of 3 inches of new AC pavement. The plans showed compete details for varying cross-sections, and the roadway was carefully graded to alleviate existing ponding issues.
  Thomas Avenue was slightly more challenging since the surrounding areas were relatively flat and the existing AC and ABC thickness varied greatly throughout the entire length of the road, as well as from one side to the other. Our crews started the project by implementing the SWPPP controls. Since the design dictated complete pulverization of the road, our crews worked with another subcontractor who provided the pulverization. Our crews performed dust control with our 2000-gallon water truck, graded the roadway with our 672GP grader to achieve the cross-sectional slopes indicated on the plans, and compacted the roadway with our CAT CW14 Rubber Tire roller. The road was then paved with 3 inches of new AC, and our crews adjusted all utility covers to finished grade.
• Missile Ordnance Road was a narrow 1,300-foot asphalt roadway that was visibly cracked and did not have proper cross-sectional slope to prevent ponding during rain events. The pavement core results also showed the existing AC was only 1.5- to 2-inch thick; therefore, GCE determined the roadway needed complete reconstruction and prepared plans showing pulverization of the existing AC and ABC and using the material as recycled ABC. Final design included 3-inch AC over 6-inch recycled ABC.
  For Missile Ordnance Road, our crews began by saw-cutting all edges of existing pavement for proper abutment of the new AC. GCE oversaw the pulverization of the existing AC and ABC to a depth of 9 inches below the existing road surface. Our crews then graded the roadway with our 672GP grader to achieve with a proper 2% cross-section. Three inches of AC pavement was then placed and GCE finished the project by installing 3-foot wide ABC shoulders to prevent degradation of the edges of the new pavement
• Range Road was a 2 mile, 14-foot-wide roadway. Although the roadway had numerous visible cracks and showed signs of needing complete replacement, budget constraints only allowed crack sealing and two courses of chip seal for repair. GCE prepared the design plan, traffic control plan, and striping plans.
  GCE provided traffic control and oversaw the installation of crack fill, patching and double chip seal, seal coat and striping. We provided dust control throughout the project with our 2000-gallon water truck and maintained detour routs throughout construction.

Upon completion of this project, MCAS Yuma was extremely pleased with our ability to maintain the schedule on numerous simultaneously occurring projects.