Steep Bank Flat Bank
Wastewater Treatment Plant

Pape-Dawson expanded an existing City WWTP from 3 MGD to 4.5 MGD, including rehabilitation and upgrades. The treatment process at the existing plant was converted to complete mix with nitrification, doubling capacity of two existing oxidation ditches and allowing structural rehabilitation repairs to occur in each basin while the plant remained at full capacity and within compliance.

The existing plant had outdated equipment and insufficient mixing/aeration. Pape-Dawson resolved these issues by adding fine bubble diffusers, external turbo blowers, and submersible mixers to improve oxygen transfer and energy efficiency. Additionally, phased flow diversion prevented service disruption during upgrades, ultimately resulting in more efficient and cost-effective treatment infrastructure.

The project consisted of an expanded headworks structure, a new UV basin channel, an expanded sludge-holding basin structure, addition of a second belt filter press, sludge conveyor replacement, replacement of all existing headworks equipment, bypass and recoating of existing headworks channel, structural rehabilitation/isolation of the existing splitter box, addition of odor control, and conversion of two oxidation ditches to aeration basins.

Project Type

Water & Wastewater

Project Sub-Type

Wastewater
Treatment Design