Extended North Tunnel project in Ellicott City begins with groundbreaking

Construction has begun on the next phase of Ellicott City’s Safe and Sound flood mitigation plan, an 18-foot tunnel that will divert 26,000 gallons of water per second from the West End to the Patapsco River. The $141.5 million Extended North Tunnel is considered not only the focal point of the plan, but it is the largest public project in Howard County’s history.