If you’ve driven east on Route 20 lately you’ve seen as I have that the watershed around the Sudbury river is back to it’s normal depth despite the dry Summer we’ve just had. Every year we wonder will it be inundated with water and the water level cross the road height as it does occasionally in Spring. Where does all this water come from and where does it go?
In very general, simple terms … the majority of surface water travels from west to east along the Hop Brook and it’s watershed (the blue areas on the map on the left side above route 20). It crosses route 20 near Lotus Blossom Restaurant and then travels northeast to the Sudbury River watershed, or as the native Algonquin called it, the Musketaquid. It then crosses route 20 near the Wayland town line, and travels north (the blue area along the right side of the map) and finally joins with the Asabet River at Egg Rock in Concord to form the Concord River.
A great description of the Hop Brook watershed can be found at this link on the town website.
The Commonwealth is in the process of re-doing the flood maps for Sudbury, with the estimated completion date being summer of 2014. The town of Sudbury Engineering Department is reviewing the new maps right now and at the Annual Town Meeting we will all be voting to accept (or not) the new maps. If the motion is denied it may affect our ability to get flood insurance if we need it. In the mean time if you are wondering about flood zones and how they might impact your property or one you’re considering purchasing, your best resource is your homeowner’s insurance professional.