INNOVATION IN wATER AND wASTEwATER TREATmENT PLANTS
metropolitan water District of Southern California
weymouth treatment plant Upgrade/orp
La Verne, California, united States
The metropolitan Water District of Southern california owns and operates the
F.e. Weymouth Treatment plant, a 70-year-old facility with a current capacity of
520 million gallons per day. A $377 million upgrade included the Improvements
program to modernize and enhance plant reliability; and the oxidation retrofit
program to add ozone as the primary disinfectant.
The phased programs involved multiple projects to develop the main facilities
and supporting infrastructure for the oxidation retrofit program. metropolitan
Water District relied on microStation and Inroads to maintain consistency and
communication. maintaining an accurate 3D model and up-to-date cAD files for
as-builts and infrastructure avoided inconsistencies, eliminated interferences,
and minimized change orders.
michael C. gallant, PE, PA
pluris north topsail wwtF
Sneads Ferry, North Carolina, united States
pluris, a privately owned public utility, expanded the wastewater treatment
system serving Sneads Ferry and north Topsail Beach in north carolina from
. 5 to 1. 5 million gallons per day. The $7.5 million expansion used a membrane
bioreactor treatment system that required two high-rate infiltration disposal
basins to achieve the state-mandated effluent parameters.
michael c. Gallant used powercivil to model the grading and gravity pipelines
for the effluent disposal system. powercivil produced accurate cut-and-fill
values for the excavation of the high-rate infiltration basins and the engineered
fill for the center dyke. The modeling produced savings on materials, excavation,
and the under-drain system.