54Site ID:Rowley / NewburyTown:65.6Acres:YesRapid Technical Site Assessment:RestrictionFillAgricultureOtherCompleted ProjectHighPriority:Site consists of the Red Gate marsh system that is bounded by Route 1A to the east and Red Gate / Old Rowley Road to the west. Approximately 65 acres of marsh are tidally-restricted by two culverts beneath Route 1A. A tidal survey was conducted in 2004 measuring the tides upstream and downstream of the Route 1A crossing and measured a maximum restriction of over one foot during spring tide conditions. Both culverts were recently replaced by MassHighway due to structural failure and the new culverts appear to be in good condition. Restoration actions would replace one or both culverts to restore full tidal flows to the upstream marsh. Restoration potential is considered high based on the large area of restricted marsh upstream and the severity of the restriction impacts, including significant marsh subsidence. Further assessment is needed to model the hydrology of both culverts and determine the feasibility of increasing tidal flows. See the Rapid Site Assessment for further details. This site is also affected by a recent MBTA mitigation culvert installation project beneath Old Rowley Road in the northwest portion of the site (see site #72). Restoration of tidal flow at this site would also positively affect tidal flows into an upstream marsh in the southwest portion of the site (see site #71).Site Summary:Under DevelopmentImpact Type(s)StatusPotential Project
