Due to the rapid growth within the Town of Queen Creek and in the entire Southeast Maricopa County/Northern Pinal County area, improving the transportation corridors near the Town Center became a vital issue. To alleviate traffic congestion, the Town Council approved design of Ellsworth Loop Road from Queen Creek Road to Chandler Heights Road as a six-lane roadway with raised medians, sidewalks and landscaping.
Premier prepared the bridge type selection study and plans, specifications and estimate package for the north-bound and south-bound Queen Creek Wash bridges, retaining walls, and pump station for the Ellsworth Loop Road Improvement District. The bridges are two-span pre-cast, pre-stressed AASHTO girders and a cast-in-place concrete deck supported on drilled shafts with an out-to-out width of 53 feet and length of 208 feet. The geometry of the bridges was complex due to the skew of the wash and the curved roadway alignment. The concrete retaining walls were designed to allow Ellsworth Loop Road and Rittenhouse Road to be depressed at the north end of the project limits to accommodate a Union Pacific Railroad crossing over the roadways.
The pump station was designed to accommodate four main submersible pumps, 135-HP each, and one secondary low flow submersible pump at the wet well. This reinforced concrete pump structure consisted of a 27-foot wide by 36-foot long underground vault extending to 45 feet deep.