Municipal
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 Brace – 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
Courthouse
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
BOCES WWTP
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
WWTP
Fire House Generator
New Fire House
Village of Walton – Walton, NY
Walton Firehouse
Village of Windham – Windham, NY
WWTP
Walton Armory – Watlon, NY
Replace Boiler
Worcester – Worcester, NY
Water Meter Installation
Fire House Renovations