The Metropolitan Sewer District (MSD) of Greater Cincinnati had two combined sewer overflow (CSO) manholes at the Mill Creek Interceptor that became surcharged and overflowed to the river. It tried a typical fix by bolting down the manhole lids to prevent the discharge, but the lids would be broken off due to surge pressures in the CSO from the throttling of flow into the plant.
The winter of 2013 and 2014 featured a “polar vortex”—a severe and sustained arctic blast that closed down businesses, schools, roads and airports across the country for weeks. During this time, Tideflex Mixing Systems (TMS) from Tideflex Technologies kept ice from forming in tanks at a borough water treatment plant in south-central Pennsylvania.
Tideflex Technologies, a division of Red Valve Co. Inc., appointed Paul Handke as the Tideflex Mixing System (TMS) product manager.
The zero-maintenance passive Tideflex Mixing System (TMS) has been installed in over 3,000 water tanks, has been extensively CFD- and scale-modeled and has proven to improve water quality and mitigate ice formation by achieving complete mixing utilizing the inherent energy of the distribution system that causes tanks to fill and draw. Passive TMS has achieved complete mixing in tanks with less than 10% volume turnover.
In 2006, the Merrimac River flooded into two residential areas in a Massachusetts city. Twenty-five homes were damaged during the incident.
In the past, this city had partnered with Red Valve Company for flow-metering work. It called Red Valve again to discuss using Tideflex check valves in order to prevent future flooding in these areas.
During typical rain events, a storm drain located in a Michigan community would rise significantly and backflow into a connecting storm sewer, causing flooding on heavily traveled streets and adjacent properties. The city installed a duckbill check valve to help prevent the backflow. Unfortunately, the valve protruded from a retaining wall and was damaged by violent surging that occurred at the mouth of the drain during storms.
A neighborhood in Kentucky was plagued by unpleasant odors that emanated from the community’s combined sewer system (CSO). The odors originated in a collection basin that collects storm water and discharges it through a pipe into the CSO.