Client

An Energy Provider

Key Services

  • Wetland Delineation
  • Wetland Mitigation Planning and Design
  • Wetland Permitting Support
  • Vernal Pool Surveys
  • Biological Stream Monitoring
  • Tier II Waters Impact Analysis
  • TMDL Impact Assessment

Project Details

Coastal Resources, Inc. (CRI) identified and delineated wetlands and other Waters of the U.S. for the majority of the Maryland over-land portion (approx. 86 miles) of a proposed 152-mile electrical transmission line.  Hydric soils, wetland vegetative communities, and hydrologic parameters were identified for hundreds of wetlands along existing transmission corridors as well as newly proposed corridors using the Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Atlantic and Gulf Coastal Plain Region (USACE October 2008).  Within Charles County, Prince George’s County and portions of Calvert County, CRI was part of a team of scientists, providing primarily technical delineation leadership for the field effort.  For portions of Calvert County, and all of Dorchester and Wicomico Counties (>20 miles), CRI managed all aspects of the delineation, determining wetland boundaries, gathering field data, supervising GPS survey, preparing GIS mapping of all wetland resources and prepared detailed wetland delineation reports for each parcel crossed as well as the right-of-way as a whole.  CRI staff led regulatory agency field reviews of wetland boundaries within the proposed right-of-way and converter station sites in support of the jurisdictional determination (JD) and prepared Approved JD forms for all delineated resources.

While CRI was originally hired primarily as wetland delineators, the firm was soon integrated more thoroughly into the project team to provide broader expertise on the Maryland MDE/USACE permitting process for large linear projects.  CRI provided support and expertise on the wetland and waters permitting and mitigation process to the client and the prime environmental consulting firm on an as-needed basis.  CRI also provided technical expertise for addressing MDE comments related to Maryland Tier II watersheds and TMDLs.  CRI reviewed and worked with the project team to interpret the relatively new Tier II regulations as they related to the MAPP project, prepared a Tier II waters monitoring plan, a Tier II No Discharge/No Impact Analysis Report, and an Analysis of Potential Project Impacts to Total Maximum Daily Loads (TMDLs) for Mattawoman Creek and the Chesapeake Bay. CRI prepared responses to agency comments and participated in agency coordination and negotiations regarding Tier II regulatory authority, impacts to Tier II watersheds, proposed construction BMPs, and potential stewardship projects to reduce impacts to Tier II waters.  In response to agency concerns regarding impacts to vernal pools within the Southern Maryland portion of the project, CRI conducted a vernal pool survey within the Burches Hill to Chalk Point and Possum Point to Burches Hill segments of the project.  The location, size, and shape of potential vernal pool habitat were mapped along with observations of amphibian or reptile species present.  A detailed report and mapping of vernal pools within the right of way was provided to the client for submittal to MDE.

CRI also participated extensively in the mitigation planning process for the Southern Maryland portion of the project.  CRI conducted desktop suitability reviews on potential mitigation sites screened by the prime environmental consultant.  Sites that appeared suitable during the desktop review were then reviewed in more detail in the field to verify current land use and document potential sources of hydrology, on-site soil characteristics, access, initial property owner interest, and opportunities for wetland creation, restoration, or preservation.  Top-ranked sites were reviewed with MDE for approval, and Phase I conceptual plans were developed.  After property-owner negotiation, CRI developed groundwater monitoring plans to support Phase II mitigation planning and installed groundwater monitoring wells on 3 sites in Southern Maryland, and 2 sites in Dorchester County.  Groundwater was monitored for a year before the MAPP project was canceled by the client due to changes in regional power demand projections.  Groundwater data was compiled for inclusion in the project files should the project be re-started in the future.