Water rushed from all directions until the larger Patapsco River can’t handle the volume. The valley and large water confluence causes the natural watershed to be turned into a river itself. The Patapsco can carry larger amounts of water than the Tiber River can, adding to the quickness of the flooding downtown. The Tiber River is tiny compared to the Patapsco River.
Tiber River watershed, adapted from Google Maps This makes water from almost all directions converge in the valley to the Tiber River before being emptied in the Patapsco. Another issue is that Ellicott City sits in a shallow valley, with many of the expanding buildings and homes having to be build literally over the Tiber river. So what makes it so prone?įirst of all, Ellicott City sits at the confluence of the Tiber and Patapsco Rivers. There has been at least four different major floods in recorded history in Downtown Ellicott City. Lower Ellicott City had been prone to flooding since it was founded. As we consider next steps, let’s step back and get a better understanding of the big picture. Significant work has already been done to understand the challenges and identify the work to be done. Short-term planning needs to consider long-term requirements for improved flood mitigation. Īs we mourn the deaths of two people, the torment inflicted on residents and businesses, and the loss we feel as a community from the July 30th flood, planning has begun for the city’s restoration.Įllicott City has a long history of flooding, and each time has recovered better than before.
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