West Papillion Creek Inceptor

Run time: 11/23 – 09/24

Projected Value: $775,000

Project Details:

• • • • • • • • • • Project Name: West Papillion Creek Interceptor Siphon Replacement
                  • Location: Bellevue, NE
                  • Customer: Hawkins Construction Company
                  • Responsible Branch: Omaha

Overview

A deteriorating siphon under the Big Papillion Creek —already operating well beyond its expected lifespan —needed replacement. The siphon completed the junction of the Papillion Creek and West Papillion Interceptors, making the replacement essential for the flow of wastewater in the area. Before Hawkins Construction Company could begin the replacement, both interceptors needed to be successfully bypassed. They turned to Mersino for a reliable, high-capacity solution.

Actions

With a compressed two-week bidding window, our team quickly analyzed flow data to determine bypass requirements. After several conversations with HCC about job phasing and flow requirements, we designed two systems: a downstream connection designed to handle up to 90 MGD, and an upstream connection designed to handle up to 39 MGD.

We collaborated closely with the contractor and engineers to refine the system design and after a few revisions, we finalized a solution to handle the required flow using:

• • • • • • • • • • Five 18 & 24GST pumps for the upstream connection system
                  • Ten 18 & 24GST pumps for the downstream connection system

Overcoming Challenges

The eastern, downstream system created several challenges:

• • • • • • • • • • The largest issue was the precipitation that occurred during setup, which was a frequent occurrence
                    • The Papillion Creek Interceptor carries a combined flow which causes it to overfill during any rainfall exceeding 1-1.5″ of rain.
                    • Due to the extremely muddy terrain, even light rain would render the site inaccessible for multiple days at a time.
                    • One exceptionally large shower occurred which required us to relocate all delivered pumps uphill to prevent damage from flooding.

Our team was able to react and adapt quickly during the heavy rain, which allowed us to keep progressing through the project until it was successfully completed.

Final Results

• • • • • • • • • • Due to the success of the project, the siphon was installed and is currently supplying flow for most of southern Omaha.
                  • Our work allowed for all the work to be completed safely and easily without any concern for water infiltration.
                  • Post-project, Hawkins Construction expressed repeated appreciation for Mersino’s professionalism, problem-solving, and execution in the field.