Dewatering

	Building Excavations Dewatering your site excavation with Tri-State wells can save you money. You'll appreciate these advantages: Better working conditions Uncluttered working area Lower Operating Costs Less lost time
Tunnels Storm water tunnels under the Minneapolis-St. Paul freeway system are often mined in St. Peter sandstone under 15 to 70 feet of artesian water pressure. Dewatering the entire length of the tunnel with Tri-State's gravel packed wells has helped to change a difficult job into a routine job.
	Dams The outlet structure of the storm water tunnel of the Northeast leg of Interstate 35 in Minneapolis was built 22 feet below normal pool elevation of the Mississippi River. Five wells were required pumping approximately 8000 gallons per minute to keep the area dry.