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We support Civil and Environmental Firms to deliver cost-effective designs and obtain permits more efficiently

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Some projects need expertise beyond that which traditional civil and environmental firms provide.

WEC delivers specialized services to help your team with:

  • NPDES discharge permitting and plume modeling
  • Numerical modeling of hydrodynamics, water quality, sediment transport, and wave transformation
  • Coastal engineering
  • Field monitoring (water levels, flows, currents, water quality)
  • FEMA flood hazard mapping and LOMR applications
  • Hurricane hazard modeling (extreme storm surge water levels, wind and waves) to support coastal resiliency planning
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Project Spotlights:

Navy Yard Dry Stack Marina-Water-Environment-Consultants-background
North Charleston, SC

Navy Yard Dry Stack Marina

• WEC was contracted by T.Y. Lin to evaluate design conditions for a proposed dry stack marina docking facility, complete with a floating wave attenuator, fixed pier, drop well and floating docks.

• The study incorporated extensive field measurements for tidal currents and vessel wave heights. WEC used the 2D SWAN model to establish extreme wave conditions at the site for a variety of storm scenarios and return periods. The project also included an assessment of sedimentation rates at the proposed dock facility to estimate future dredge maintenance needs.

Evonik Corporation, Bushy Park Facility-Water-Environment-Consultants-background
North Charleston, SC

Evonik Corporation, Bushy Park Facility

• Evonik Corporation was evaluating two potential sites for a new, precipitated silica plant, and obtaining a favorable NPDES permit was a primary deciding factor. WEC obtained the required NPDES and wastewater construction permits for the treatment and discharge of a highly salty wastewater into the Cooper River, South Carolina.

• WEC used the CORMIX model to design a single-port diffuser resulting in favorable whole effluent toxicity limits and the EFDC model to ensure the discharge would not affect the dissolved oxygen within the river.

Long-term Tidal Current Monitoring-Water-Environment-Consultants-background
Hilton Head Island, SC

Long-term Tidal Current Monitoring

• WEC was subcontracted by CDM Smith to conduct long-term tidal water level and current monitoring at Hilton Head Island to support their design options to widen a segment of US 278.
• The study included 6-month deployments of an Acoustic Doppler Current Profiler (ADCP) to measure tidal currents in the river and three water level gauges in the estuary. WEC also measured currents using a vessel-mounted ADCP to characterize the spatial distribution of currents beneath two bridges. The study provided high-quality, continuous current and water level measurements in the rivers over a 6-month period.
Lancaster County Water and Sewer District, Indian Land WWTP
Lancaster County, SC

Lancaster County Water and Sewer District, Indian Land WWTP

• Under contract with MBD Consulting Engineers, P.A., WEC provided NPDES permit and outfall design support for a proposed WWTP upgrade.

• Services included field measurements for bathymetry, current velocity, and temperature as well as multiple CORMIX modeling scenarios for various outfall configurations. The project resulted in whole effluent toxicity (WET) limitations with sufficient compliance margin for the plant expansion and addressed NPDES permit limits for future expansion plans.

Saluda County Water and Sewer Authority
Saluda County, SC

Saluda County Water and Sewer Authority

• Saluda County Water and Sewer Authority proposed a new, larger WWTP but was unable to acquire a new wasteload allocation at the existing site discharge due to existing dissolved oxygen impairments within the Little Saluda River.
• Under contract with MDB Consulting Engineers, P.A, WEC completed field measurements and water quality modeling of the proposed discharge to demonstrate the project’s compliance with state water standards, potentially saving millions in project capital costs.
Mossy Oaks Drainage Project Tide Monitoring-Water-Environment-Consultants
Port Royal Island, SC

Mossy Oaks Drainage Project Tide Monitoring

• Infrastructure Consulting & Engineering retained WEC to deploy six continuous water level gauges in two tidal creeks affected by culverts under roadways.
• The study included high-quality, water level measurements for a period of 2-weeks.
• The data was integrated into a hydraulic model to support the City of Beaufort’s ongoing drainage improvement efforts in the Mossy Oaks neighborhood.
San Sebastian River Drainage Study-Water-Environment-Consultants
St. Johns County, FL

San Sebastian River Drainage Study

• The County needed to incorporate future risk from sea level rise into stormwater infrastructure improvements for the San Sebastian River drainage basin. To support the County, Applied Technology and Management (ATM) subcontracted WEC to assist them with evaluating combinations of sea level rise and hurricane storm surge in the drainage basin.

• WEC developed a storm surge analysis methodology to include improving the FEMA ADCIRC model for the region. WEC worked with ATM to complete the hurricane modeling analysis.

• The study results provide a more robust assessment of the storm surge and sea level rise scenarios within the upper St. Johns River and tidal tributaries, which the County can incorporate into stormwater infrastructure design.

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