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Sediment Sampling and Dam Removal Assessment

Braintree, Massachusetts

Services: Investigation, MCP Compliance, Wetland Protection Act, Regulatory Interpretation
Client Served: Real Estate Development

Loureiro’s client wanted to evaluate the implications of removing a dam associated with a mill pond. The real estate developer requested assistance in evaluating the conditions associated with the pond sediment and whether those sediments may have been impacted by upstream releases or historical mill activities. The client also wanted to understand permitting requirements associated with ongoing dam maintenance as well as dam removal.

Loureiro completed a phased investigation of the pond sediments. The investigation started with a literature search to understand the regional history of the watershed to better understand potential contaminants and contaminant sources (including an upstream Superfund site) which may have affected sediment quality. Loureiro then collected sediment samples for laboratory analysis. Sediment samples were chosen based on the historical stream morphology, existing pond conditions and the anticipated stream morphology upon dam removal. Based on the results of the investigation and sampling, Loureiro provided recommendations relative to the possible implications regarding downstream sediment load, need to excavate and remove contaminated sediment, permitting requirements and potential benefits associated with anticipated stream morphology. Loureiro evaluated site conditions and permitting requirements pursuant to the Massachusetts Contingency Plan, the Wetlands Protection Act as well as possible permitting and licensing with the Army Corps of Engineers, Department of Fisheries and other entities.

Highlights

  • Timely assessment and investigation tailored to site-specific and client-specific concerns
  • Stream and sediment sampling.
  • Predicting stream morphology.
  • Regulatory Interpretation of Wetlands Protection Act, Massachusetts Contingency Plan and other licensing and permitting requirements.