Our Solution
WSSI provides environmental expertise and supports the County through an on-call contract for engineering services. Together we have accomplished a variety of tasks addressing:
- Stream nutrient assessments for improving water quality to meet state and federal mandates
- Water quality improvement project construction management
- Stormwater management improvements through pond and outfall modifications
- Invasive species management
- Wetland and other jurisdictional waters delineation, impact permitting, and impact monitoring
- Tree inventories and preservation plans
So far, our projects together include:
- Ballston Pond: construction management, plan revisions, site inspections
- Concord Mews Pond Retrofit: tree inventory and preservation planning, wetland and stream delineation and impact permitting, survey, feasibility analysis, project management, stormwater management retrofit design
- Donaldson Run Headwaters, Tributary A: outfall stabilization design, design of stream repairs, nutrient reduction calculations, construction management and inspections
- Donaldson Run Headwaters, Tributary B: stream survey, nutrient reduction calculations, permitting and regulatory coordination, construction inspections and monitoring, post-construction management
- Four Mile Run Trail Connection (Potomac Yard and West Glebe Road Bridge): tree inventory and preservation planning, invasive species management, wetland and stream delineation and impact permitting, Water Quality Impact Assessment
- Gulf Branch: survey, stream restoration design, public engagement, vegetation assessment, impact assessment, and permitting
- Gulf Branch Reach 4 & 5 Assessments: Protocol 5 nutrient analysis
- Rosslyn Area Potomac Interceptor & Columbia Pike/Sparrow Pond: sanitary sewer pipe stabilization, HUD categorical exclusion documentation
- Safe Routes to School Project, Glebe Road and 18th Street North: tree inventory and preservation planning
- Sparrow Pond: tree inventory and preservation planning, wetland and stream delineation and impact permitting, planting plan, construction management and inspections
- Spout Run Deep Sewer Relining: endangered and threatened species assistance (northern long-eared bat)
