Downey Contracting’ s work involves the construction of 3,346 LF of 54” sanitary sewer which includes six 72”diameter bores and
four aerial crossing which were also encased in 72”
casing pipe. Two of the aerial crossings were over existing rivers and the others were built 15’
below existing grade for future interstate highway grades. All of the aerial crossing required
drilled pier foundations, some of which were in the North Fork River. One bore was under
operational BNSF railroad track. Eleven manholes and boxes were constructed along the route.
The project also includes the construction of 433 LF of 36” sanitary sewer which included one
aerial river crossing.
The project also includes 8”, 10”, and 12” sanitary sewer along and under Grand Blvd.
Sanitary sewer service remains active throughout construction. Four temporary 10” pumps were required to pump around a junction box while final tie‐ins were made.
OSU Voltage Upgrade
Downey Contracting was awarded the prime subcontract for the Voltage Upgrade Project Bid Package 2 at Oklahoma State University. The project included construction of 2,600 lf of new electrical duct banks with new precast vaults. The scope of work included excavation and shoring approximately 10’-14’ deep within very tight construction limits to minimize as much disturbance as possible. Concrete encased duct banks were installed with multiple conduit runs for future electrical distribution. Also included were transformer and switchgear upgrades and replacements at Edmond Low Library, Engineering South and Engineering North. This project required multiple crews working in multiple locations during summer break. The majority of the project was completed within the 82 day schedule, with Downey turning over the finished areas for the University’s use before the start of the fall semester.