Client

Baltimore County Department of Environmental Protection and Sustainability (EPS)

Key Services

  • Wetland Delineation and Permitting
  • Geomorphic Stream Assessments
  • Aquatic Habitat Assessments
  • Design Support
  • Landscape Design
  • Permitting Support
  • Construction Inspection

Project Details

Coastal Resources, Inc. (CRI) was a subconsultant under a prime contract with Baltimore County EPS for the assessment and restoration design of approximately two miles of White Marsh Run from White Marsh Road to Perry Hall Boulevard.  CRI conducted delineations for wetland and waters of the U.S. throughout the project area.  CRI identified 16 wetlands and 15 waterways associated with White Marsh Run and adjacent floodplain areas, and performed functional assessment of wetlands greater than one-half acres using the USACE New England Method.  CRI developed a detailed report of the delineations that included methods, results and mapping of the natural resources including significant tree survey. CRI assisted the team with agency field review of jurisdictional wetlands and waters of the U.S. and supported the joint application process to obtain the 404/401 permit.

CRI also assisted with the design process through both geomorphic and aquatic habitat assessments. CRI worked with the prime consultant to conduct geomorphic assessments of existing stream conditions that helped form the basis of the restoration design.  Assessments included stream cross-sections, longitudinal profiles, installation of sediment buckets for sediment transport analyses, pebble counts, facies mapping and bulk sampling collection and analysis of sediments.  For assessment of aquatic habitat conditions, CRI reviewed and compiled existing biological, aquatic habitat, and water quality data for the White Marsh Run area from government agencies and non-profit monitoring groups.  This was used to identify possible stressors or limitations that should be considered during design of the restoration project.  The data was also used along with geomorphic assessment data to identify habitat deficiencies that potentially limit aquatic communities and guide potential instream treatments that could remediate habitat deficiencies and enhance aquatic communities.

CRI was also responsible for evaluating approximately 20 tributaries draining to the mainstem of White Marsh Run and determining which of the tributaries needed stabilization or treatment measures.  CRI supported design for 17 of the tributaries with stabilization measures and treatments that addressed further channel degradation, and in many cases, targeted protection and enhancement of adjacent floodplain wetlands.  CRI also coordinated with Baltimore County DPW staff members to review sanitary sewer alignments for recommendations of sewer protection and approval of tributary treatments that presented constraints with sewer infrastructure.  Assisted with stream details and specifications, and landscape design and planting schedules.  CRI also provided construction inspection and designated specialist services to assist the contractor with maintaining design goals and objectives during construction of the project.