Commission approves Mil Creek thin‑layer pilot to raise marsh elevation and study carbon/alkalinity effects
The Wellfleet Conservation Commission approved an amended Order of Conditions for a Mil Creek thin‑layer sediment‑placement pilot that will test three treatments (sand; sand+limestone; sand+olivine) across small, partitioned salt‑marsh cells to raise marsh elevation, monitor ecosystem responses and measure carbon/alkalinity fluxes. The vote followed extended technical presentations and a discussion of shellfish and metals monitoring.
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The commission voted Aug. 5 to approve an amended Order of Conditions for a thin‑layer pilot in Mil Creek, part of the Herring River Phase 1 restoration. Project proponents described a small, highly controlled experiment (about 1–1.5 acres of treatment within a ~3‑acre study area) that will place up to roughly 6 inches of material in three half‑acre cells, each receiving a different material treatment: Cape Cod sand (control), sand mixed with ground limestone, and sand mixed with ground olivine.
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