Onondaga County
Drain, Sewer and Septic Work in Jamesville
Jamesville's wastewater leaves the hamlet through a single pumped facility, and the county models that station at 38.0 percent structure damage in a flood, the highest of any wastewater facility in the DeWitt annex. In a large flood a Jamesville property should expect the sewer to be unavailable rather than merely slow, which is the case a backwater valve is bought for.
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Jamesville Reservoir and the septic money most owners never claim
The Town of DeWitt annex to the 2025 county hazard mitigation plan lists the Jamesville Pump Station, owned by Onondaga County Water Environment Protection, at 6660 East Seneca Turnpike, Jamesville, as exposed to both the 100 year and the 500 year flood, with modeled structure damage of 38.0 percent. That is the highest modeled structure damage of any wastewater facility named in the DeWitt annex.
Source: Onondaga County 2025 Multi-Jurisdictional Hazard Mitigation Plan, accessed 2026-09-08
Section P3008.1 of the New York residential code requires that where the flood level rims of plumbing fixtures sit below the elevation of the manhole cover of the next upstream manhole in the public sewer, those fixtures shall be protected by a backwater valve installed in the building drain, a branch of it, or the horizontal branch serving them. Section P3008.2 requires the valve to be of the normally open type where fixtures sit above that elevation, and section P3008.4 requires that the valve be installed so its working parts stay accessible.
Source: 2020 Residential Code of New York State, Section P3008, via UpCodes, accessed 2026-09-08
WEP names three causes of basement backups: blockages in the sewer line, inflow during heavy rainfall overwhelming the sewer system, and tree roots infiltrating sewer pipes. Its published prevention steps are to keep fats, oils, grease and wipes out of the drain, to check for sump pumps, roof drains and gutters wrongly connected to the sanitary sewer, to eliminate or redirect an unneeded basement sewer connection, to plug or fit a one-way device to a basement floor drain that connects to the sanitary sewer, and to have a licensed plumber install a backwater valve, which must be inspected and cleaned regularly. The department warns that while a backwater valve is holding back a surcharge it is also stopping flow from leaving the house.
Source: Onondaga County Department of Water Environment Protection, accessed 2026-09-08
The Onondaga County Health Department administers New York's Septic System Replacement Funding Program for properties within 250 linear feet of Skaneateles Lake, Skaneateles Lake's tributaries, Otisco Lake, the Seneca River between the Cross Lake outlet and Klein Island, Jamesville Reservoir, or Rush Creek Upper and its tributaries, where the owner has a substandard or failing septic system.
Source: Onondaga County Health Department, Environmental Health, accessed 2026-09-08
The Meadowbrook-Limestone Wastewater Treatment Plant, completed in 1973 at 7530 Manlius Center Road, serves sections of DeWitt, Manlius, Pompey and Syracuse. It was built after a 1963 state-funded study classified pollution in Limestone Creek as critical and the county established a new sewer district at Meadow Brook on Butternut Creek. WEP's sewer consolidation program currently has a Meadowbrook-Limestone inflow and infiltration abatement project in progress, lining sewers and replacing and rehabilitating manholes across the plant's service area to reduce excessive wet weather flows.
Source: Onondaga County Department of Water Environment Protection, accessed 2026-09-08
A valve that closes also stops your own water leaving
Tell us what the basement does in heavy rain and we will say what protecting it actually involves.
One pumped outlet, and what it means for a Jamesville basement
Jamesville is a hamlet in the Town of DeWitt and its sanitary flow leaves through one county facility: the Jamesville Pump Station at 6660 East Seneca Turnpike, which the county's own hazard modeling places in both the 100 year and the 500 year flood with 38.0 percent structure damage, the highest of any wastewater facility named in the DeWitt annex. Read that as an outlet that can be unavailable rather than merely slow. The code test for protecting a basement is a comparison of two elevations, not an opinion: section P3008.1 of the New York residential code requires a backwater valve in the building drain, a branch of it, or the horizontal branch serving any fixture whose flood level rim sits below the cover of the next upstream manhole in the public sewer, and section P3008.4 requires the working parts to stay accessible. Water Environment Protection adds the part people miss: while a valve is holding back a surcharge it is also stopping flow leaving the house, so it comes with a household rule as well as a fitter. Sewered Jamesville drains to the Meadowbrook-Limestone plant on Manlius Center Road, where the county has an inflow and infiltration abatement project relining sewers and rehabilitating manholes to reduce wet weather flows. And for anyone here not on the public sewer, Jamesville Reservoir is one of only six waterbodies in the county named in New York's Septic System Replacement Funding Program: a property within 250 linear feet of it with a substandard or failing septic system should apply through the county Health Department before paying for a replacement outright.
Backflow, drain and septic work we arrange in the hamlet
Clogged and Slow Drain Cleaning
Get one slow or blocked fixture running again, and find out whether the fault stops at that fixture or carries on out to the street.
Drain Cleaning in Jamesville →Sewer Line Cleaning and Root Removal
Clear the one pipe that carries the whole house out to the street, take the roots or the grease out of it, and establish where along that run the blockage actually sat.
Sewer Line Cleaning in Jamesville →Sewer Backup and Basement Flooding
Get the line open and the house draining again, then establish whether the water came from your own lateral or from the system in the street.
Sewer Backup in Jamesville →Sewer Line Inspection and Repair
Find out what is actually wrong with the lateral, how far along the run it sits, and whether the answer is a cleaning, a spot repair or a replacement.
Sewer Line Repair in Jamesville →Tell us what is happening below ground in Jamesville
Send your ZIP code and what you are seeing. There is no obligation, and if this is a clear-out we will say so.