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. GCE performed a topographic survey of all four roadways to use as the base file for the design of each road and prepared complete design drawings in accordance with Unified Facilities Criteria. The drawings included a dimensioned site plan, a grading plan, details, and striping and signage plans.
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 inches of aggregate base course (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.
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 re-using 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.
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 1.5-2 inches 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 inches of AC over 6 inches of recycled ABC.
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.