Upper St. Mary’s River Restoration

Large-scale restoration efforts began in 2021 in the Upper St. Marys River sanctuary. The initial implementation phase of the restoration project is anticipated for completion in 2022, with a total of 60.2 acres of reef restored.​

The restoration plan for the Upper St. Marys River may be found here​

The pre-construction groundtruthing report can be found here​.

Below is an interactive map with potential restoration reefs in the St. Marys 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 January 2022.

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).


2021 restoration update