(607) 432-1655


Municipal Plumbing, HVAC and Electrical Contracting

Feature Project

Windham Waste Water Treatment Plant
Windham, NY

Built in 2004, A. Treffeisen & Sons completed the HVAC / Plumbing and Electrical on this new waste water treatment plant including the integrated control system.

Municipal Plumbing, HVAC and Electrical Contracting

Allen Residential Center – South Kortright, NY
Storm Water Project

Belleayre Mountain Ski Center – Belleayre, NY
Snow Making Compressor Cooler
New Maintainence Facility

BOCES – Masonville, NY
WWTP Facility

Bovina WWTP – Bovina, NY
Waste Water Treatment Plant

Camp BraceĀ – Masonville, NY
HVAC renovations
Electrical upgrades

City of Oneonta- Oneonta, NY
City Hall
Airport Fuel Farm
Oneonta DPW
Oneonta Recycle Center
Oneonta Drying Beds
Oneonta Sludge Removal System
Yankee Locker Room
Yankee Training Facility
Oneonta Transit Facility
Damasche Field Lighting
Tennis Court Lighting
Wilber Park Pool Bathhouse
Neahwa Park Pool Bathhouse
Damaschke Field Locker Room
National Soccer Hall of Fame
Oneonta Water Plant VFD
MIOX System
Oneonta WWTP Boiler
Neahwa Park Service Replacement
Huntington Library Renovations
WTP Generator Replacement
WWTP Generator Replacement
2006 Flood Repairs of WWTP
New T-Hangars @ Airpprt
WWTP Methaq Boiler Installation

HVAC System
Street Lights
Wilbur Park Bath House
Catella Well

City of Norwich – Norwich, NY
Police Barracks
Jail Renovation
Norwich Depot Building
Borden Ave. Well
City Court

Delaware County – Delhi, NY
Delaware County Landfill
Courthouse Renovations
DPW HVAC Modifications
911 Communications Center
Co-Compost Facility

Downsville – Downsville, NY
Water Meter Installations

Elka Park – Elka Park, NY
Waste Water Treatment Plant

Foothills Performing Arts Center – Oneonta, NY
Phase 1
Phase 2

Howes Cave – Howes Cave, NY
Howes Cave Post Office

Hunter Mountain – Hunter, NY
Hunter Highlands WWTP

Minekill State Park – Gibloa, NY
Bathhouse Renovations

MOSA – Cobleskill, NY
Cobleskill Recycling / Transfer Facility,Oneonta
Transfer Station Upgrades

Mountainside WWTP – Roxbury, NY
Waste Water Treatment Plant

NYC DEP – Gibloa, NY
Gilboa Dam Renconstrution
Gilboa Dam Crest Gates

NYS Dept. of Transportation
Hancook Reg. 9 Office Addition
Herkimer DOT Bathroom Renovation
Worcester Reststop

Otsego County – Cooperstown, NY
Annex Building
Oneonta Satellite Office
Meadows Septic System
Otsego County Satellite Office Bldg.
Otsego County Courthouse Ren.

Oquaga Lake – Deposit, NY
Oquaga lake Waste Water Treatmen Plant

Oxford Vets Home – Oxford, NY
Water Softener Syste

Town of Andes WWTP – Andes, NY
Waste Water Treatment Plant
Town Court
Railroad Station

Town of Burlington – Burlington, NY
Town Garage

Town of Delhi – Delhi, NY
Delhi Firehouse
Delhi Town Garage

Town of Guilford – Guilford, NY
New Town Hall
New Highway Garage

Town of Hamden – Hamden, NY
Hamden Town Hall

Town of Hartwick – Hartwick, NY
Hartwick Town Hall

Town of Jefferson – Jefferson, NY
Fire Department
Water Meter Installations

Town of Kortright – Kortright, NY
Town Hall

Town of Masonville – Masonville, NY
Camp Brace HVAC Renovations

Town of Middleton – Margaretville, NY
Middletown Highway Garage

Town of Norwich – Norwich, NY
Norwich Town Hall

Town of Oneonta – Oneonta, NY
Oneonta Town Hall

Town of Otego – Otego, NY
Otego Town Hall

Town of Richmondville – Richmondville, NY
Highway Garage

Town of Roxbury – Roxbury, NY
New Town Highway Garage

Town of Seward – Seward, NY
Seward Highway Garage
Maintenance Facility

Town of Vestal – Vestal, NY
Vestal Wells

Tompkin County – Cortland, NY
Tompkin County Landfill

Traffice Signals Oneonta – Oneonta, NY

Village of Bainbridge – Bainbridge, NY
Waste Water Treatment Plant

Village of Cobleskill – Cobleskill, NY
Cobleskill Youth Center

Village of Cooperstown – Cooperstown, NY
Irish Hill Pump Station

Village of Fleishmants – Fleishmans, NY
Waster Water Treatment Plant

Village of Hunter – Hunter, NY
Hunter WWTP

Village of Jefferson – Jefferson, NY
Water Meters

Village of S. New Berlin – South New Berlin, NY
South New Berlin Firehouse

Village of Otego – Otego, NY
Municipal Building

Village of Plymouth – Plymouth, NY
Fire House

Village of Richfield Springs – Richfield Springs, NY
Water Treatment Plant

Village of Roxbury – Roxbury, NY
Roxbury Run WWTP

Village of Sidney – Sidney, NY
FAA Beacon Reconstruction
Sidney Airport Fuel Farm
Sidney Post Office
Sidney Annex Building
Airport Beacon Project

Village of Stamford – Stamford, NY
Fire House Generator
New Fire House

Village of Walton – Walton, NY
Walton Firehouse

Village of Windham – Windham, NY

Walton Armory – Watlon, NY
Replace Boiler

Worcester – Worcester, NY
Water Meter Installation
Fire House Renovations