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This time lapse video illustrates Saddle Creek Retention Treatment Basin construction progress from June 2019 through July 2020. Construction on the top half of the screen includes a temporary earth retention system, soil excavation and installation of deep foundations supports. Activities on the bottom half of the screen include a new combined sewer diversion structure; two, 120-inch sewers and a new concrete channel liner. H-Pile installation for the foundation in the basin was completed in April 2020 and the focus for the next 12 months will include placing rebar and pouring concrete to construct the basin.
Mass concrete pours continue through 2020 to construct floors, columns and basin walls.
The Saddle Creek Retention Treatment Basin (RTB) facility will provide improved water quality for the Little Papillion Creek.
The Saddle Creek RTB is an important project for Omaha’s water quality Program, called Clean Solutions for Omaha (CSO!). More than 50 times a year during wet weather events, untreated combined sewage overflows into the Little Papillion Creek from the sewer outfall located near 64th and Center – just south of the UNO Baxter Arena.
The purpose of the RTB facility is to capture this water and treat it during wet weather. Combined sewage will be diverted from an existing outlet channel to the facility headworks, where large materials like cans, rocks, tree branches and floatable solids are removed using a grit pit and mechanical screens. At this point in the process, a disinfectant is added. If it is a small wet weather event, the combined sewage may be retained in the underground basin and then sent to the Papillion Creek Water Resource Recovery Facility (PCWRRF) after the conclusion of the event for treatment. If the underground basin fills up, a decholorination agent is added to the discharge, and an overflow channel is provided for discharge of treated flow back to the creek.
The RTB will use pumps to empty the facility after a wet weather event has ended. The dewatering pumps will convey captured combined sewage volume into the downstream Papillion Creek Interceptor sewer for treatment at the PCWRRF.
Above ground improvements include a building to house controls, grit and screening equipment, and chemicals. The building will provide office space for full-time staff, some additional city offices and maintenance access
to the facility.
An odor control system will be installed to address the risk of odors in the surrounding area. The site will include fencing and lighting for security purposes. Deliveries will occur regularly but are not expected outside of typical business hours.
Over 190,000 tons of soil have been excavated to create space for the construction of the 3.3 million gallon basin. Once completed, the basin will capture and treat a combined sewage flow rate of 160 million gallons per day.
Steel beams have been driven into the foundation of the concrete basin to support the facility's structure. These 848 steel beams (approximately 13 miles in total) support the weight of concrete, water, soil and other building materials. While 90% of the pile driving was completed by May 2020 for the underground basin, additional deep foundation supports will be installed in 2021 for the above-ground operations and chemical buildings.
The concrete work for the first phase of the channel and diversion structure was also completed in early 2020.
Construction from summer 2020 to fall 2021 will focus on placing rebar and concrete pours. Approximately 25,000 cubic yards of concrete, roughly 2,500 truckloads, will be used to construct the basin and the facility’s walls.
Updated June 2020
Project Number: OPW 52049
LTCP Project Name: Saddle Creek CSO 205-64th and Dupont RTB
Construction Public Meeting Presentation – May 7, 2019
Project Spotlight: Saddle Creek Retention Treatment Basin Project Benefits from Re-Engineering Efforts - February 2019
Contractor Outreach Event: Saddle Creek Retention Treatment Basin Project - Updated October 19, 2018
Contractor Outreach Event: Saddle Creek RTB - Approximate List of Work Quantities - August 21, 2018
Prequalification Orientation Meeting Presentation – June 13 2018
Prequalification Orientation Meeting Summary – June 13, 2018
Industry Day Sign-in – April 26, 2018
Industry Day Presentation – April 26, 2018
Industry Day Agenda – April 26, 2018
Aksarben-Elmwood Neighborhood Meeting – May 15, 2014
Preliminary Design Public Outreach Meeting – August 22, 2013