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City of Omaha CSO Project – Nicholas Street Phase 1

Improving Missouri River water quality

This sewer separation project in Downtown Omaha, NE was a $15.8 million contract that was dominated by a triple run of 108-inch diameter storm sewer. There was also a jack and bore section underneath a railroad crossing. The project improved the water quality in the Missouri River by removing a large volume of stormwater runoff from a combined sewer system and increased the storm sewer capacity in an underserved area.

The 108-inch reinforced concrete pipe was produced by dry-cast production method in eight foot lengths. The total project footage was 6,300 LF produced according to ASTM C-361 and ASTM C-655 specifications. Each section weighed 33,400 lbs and was shipped one piece per load to the jobsite. Hawkins Construction Company used a crane for unloading and installing the RCP.

Lamp, Rynearson & Associates designed the project to be constructed within a single trench, which was a particularly innovative design and method of construction. They were also the construction administrator, surveyors and inspectors for the project. The project was completed in the summer of 2013.


City of Omaha


Hawkins Construction Company


Lamp, Rynearson & Associates