![]() Nearly four years after the last deadly flood in historic Ellicott City, Howard County has unveiled plans to bring relief to its resilient residents by building a massive tunnel to help divert water in the future. This is not your average infrastructure project, it is part of a comprehensive solution to save a historic mill town from the impacts of severe flooding caused by climate change, said Sen. Howard County has also invested in a series of retention ponds on the outskirts of Old Ellicott City, including one with the capacity to retain more than 3 million gallons of stormwater and release it slowly once the danger has passed. and last updated 2:21 PM, ELLICOTT CITY, Md. In total, the delegation has secured nearly 42 million for the Ellicott City Safe and Sound plan and other flood mitigation projects since 2019. On May 27, 2018, the skies opened up and dumped nearly 10. The town was the victim of catastrophic flash flooding in both 20. o Probabilistic flood mapping estimates and recent flood events show that places outside the 100-year floodplain. The county has received $75 million in federal low-interest loan through the EPA's Water Infrastructure Finance and Innovation Act for the project, bringing the total amount of county, state and federal money invested in flood mitigation over the last four years to $167 million. Ellicott City has seen devastating flooding in the past. "It will be one of the most important, impactful, transformational projects that Public Works has done in the history of our town," Ball said. Flood inundation maps in the urban Ellicott City area were derived from the NWM using the Height Above Nearest Drainage (HAND) method (Rodda 2005. It amounts to enough water to fill an in-ground swimming pool being diverted into the river every second. ![]() Once completed, the tunnel, located about 100 feet underground and measuring 18 feet in diameter, will carry 26,000 gallons of stormwater per second away from the town's streets and into the Patapsco, said Howard County Executive Calvin Ball. Ellicott City, founded in the 18th century as a mill town and the site of the first terminus of the B&O Railroad outside the city, suffered two 1,000-year floods in 20, damaging dozens of businesses and killing three people. Downpours pummeled areas in the WMAR-2 News viewing area, and a Flash Flood Warning was issued for historic Ellicott City, where two massive floods destroyed the downtown and caused one death. ![]()
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