Upper St. Mary’s River Restoration

Large-scale restoration efforts are slated to begin in 2019 in the Upper St. Mary’s River sanctuary. Currently, a restoration blueprint is being drafted.

Below is an interactive map with potential restoration reefs in the St. Mary’s Sanctuary. The legend and layers are located in the upper right hand corner. You can click on a reef to see more information. The information was last updated in 2018.


​​Restoration sites are identified as ‘seed only’ restoration (hatchery-produced spat-on-shell added to existing remnant reefs) or ‘substrate + seed’ restoration (adding reef-building substrate to the reef footprint, followed by planting with hatchery-produced spat-on-shell) or ‘premet’ (sites that already meet the Oyster Metrics target oyster density (50+ oysters per m2) and oyster biomass (50+ grams per m2) and not slated to receive initial restoration).