cost to abandon a well
6. How much will it cost to have my well filled & sealed? It would be approximately $1000 to fill and seal a 100-foot deep 6-inch diameter well with bentonite chips, remove the pump and piping, and file the report. It would be approximately $1600 if that same well were 200 feet deep.A 2-inch diameter 50-foot well would cost approximately $300 to fill and seal. Grant funding may be available to assist with the cost of filling and sealing private wells through the Department of Natural Resources Well Abandonment Grant program.. How much will it cost to have my well filled & sealed? It would be approximately $1000 to fill and seal a 100-foot deep 6-inch diameter well with bentonite chips, remove the pump and piping, and file the report. It would be approximately $1600 if that same well were 200 feet deep.