Project Summary

The Richmond WWTF was originally built in 1972, receiving its last substantial upgrade in 2005 (designed by Hoyle Tanner) which added tertiary treatment and septage receiving. The facility acts as a regional septage receiving facility for the state and faces unique challenges such as experiencing a significant peak flow during wet weather events and being surrounded by a flood zone.
 
Hoyle Tanner completed a preliminary engineering report (PER) for the Richmond WWTF which identified hydraulic-related and age-related equipment needs. Future plant flows and organic loadings were analyzed to determine design conditions and evaluate the facility’s hydraulic and biological capacity. Of particular concern and immediate need was the condition of the influent pumps, which were not replaced as part of the 2005 upgrade, and were at imminent risk of failure.
 
Hoyle Tanner designed the recommended upgrade to the existing duplex influent pump system for the 20-year planning period for the purpose of purchasing and installing one of the proposed pumps ahead of the full WWTF upgrade project. Hoyle Tanner proposed a triplex dry-pit pump arrangement for this application and designed the piping modifications necessary to replace one pump with the intent that the new pump could be reused for the future triplex pump arrangement. Hoyle Tanner prepared final design drawings, specifications and bid documents for the Town to solicit bids to construct the pump upgrade project.