Announcing the Next Phase
of CSO Improvements
2005, as part of the CSO control program undertaken by the City of Wilmington,
DNREC and the EPA, an underground storage tank was buried in Canby Park to
capture a large portion of runoff. The tank is designed to hold up to 2.7
million gallons of combined stormwater and sewage so it can be treated at
Wilmington's Wastewater Treatment Plant after the rain has ended. During the
construction, CSOs 28 & 29 were diverted to this underground storage
phase of CSO improvements will require installation of a 30-inch diversion
sewer along the banks of Silverbrook Run, through a small section of the Town
of Elsmere, connecting CSO 27 to the new underground sewage retention tank
located in Canby Park. This should be completed in less than a year.
CSOs 27, 28 and 29 will:
significantly reduce the frequency of
improve the health of area waterways
reduce odors in the area
27 originates below the CSX railway, adjacent to Cathedral Cemetery.
along the Silverbrook Run where it diverges from Cathedral Cemetery.
The diversion sewer will follow this same path.
of a warning sign posted at the location of every CSO outfall.
to expect during construction
will follow the banks of Silverbrook Run and some sections of road and sidewalks
may be affected. The banks of Silverbrook Run will be restored to original
condition. Curbs and sidewalks damaged during construction will be restored
completely and roadways will be repaved curb-to-curb.
for possible changes in traffic patterns while roadwork is taking place to
prepare for sections of pipe. We will be working closely with the Town of
Elsmere to minimize the impacts to traffic. Construction equipment will be
staged in the area. Please remind children and youth to stay away from this
construction equipment. Trespassing is both illegal and dangerous.
map shows affected areas and temporary traffic patterns during construction.
map shows the location of CSO 27 along the Silverbrook Run near Lancaster
Avenue. The red dashed line shows the path the 30-inch diversion sewer
will take in order to connect the CSO to the underground storage tanks
in Canby Park. Previously, CSOs 28 and 29 were diverted to this temporary
this project completely eliminate
overflows at CSOs 27, 28 and 29?
this project and the Canby Park storage tank project were designed to reduce
the volume and frequency of overflows. If there were a practical way to replace the CSO
system, of course we would. But since that would cost millions of dollars
and would be pretty much impossible to accomplish, in most areas of the City
we are seeking ways to better manage and control our system without having
to dig up the entire City, both in the street and on private property.