Hillaryville Liftstation and Forcemain

In 2016 MSMM Engineering completed full engineering design services for a Section 219 Environmental Infrastructure project in Ascension Parish, LA. This project was designed under a partnership between the USACE New Orleans District and cost sharing partner Ascension Parish. The project was constructed as a result of antiquated wastewater infrastructure in Ascension Parish that would not allow the Parish to support future growth.

Under the Section 219, Environmental Infrastructure program, MSMM staff prepared GIS mapping of the Parish’s existing and proposed sanitary sewer system and prepared an Environmental Information Document (EID) for its long term wastewater infrastructure plan. The completed EID led to a decision that Ascension Parish needed to make significant upgrades to their public infrastructure system, specifically water lines and sanitary sewer systems in order to meet various environmental regulations they were out of compliance with.

MSMM identified alternatives that would route effluent drainage away from a neighborhood ditch and properly treat it to be within LA DEQ regulations. This led to the design and construction of a sewerage project that consisted of a 562 gpm sewerage pump station and 4,068 feet of discharge pipe that travels underneath two (2) state highways and over the Mississippi River Levee before discharging into the Mississippi River. The pipe material is mostly ductile iron for above grade application (levee crossing) and is HDPE (high density polyethylene) for the directional drill aspect of the project.

The project required extensive permitting through LADODT, LADEQ, CRPA and USACE New Orleans District. MSMM completed 100% of the required design and permitting services for the project, performed the construction management and engineering during construction, and worked with USACE to close out the construction phase of the project and prepare the new cross sectional drawings of the improved levee.