Explore projects identified as Design-Build work by Johnston or its project team. Each profile describes the work and location.
Explore Design-Build capabilities.
Water Treatment PlantsAberdeen Water Treatment Plant Design-Build UpgradeAberdeen, MarylandProvided complete design-build delivery for major upgrades to the City of Aberdeen Water Treatment Plant.
Pump StationsBeltsville Information Management CenterBeltsville, MarylandJohnston Construction Company served as the design-builder for the Beltsville Information Management Center Sanitary and Stormwater Pump Station Improvements project in Beltsville, Maryland.
Water Treatment PlantsBrown Manor Water Treatment Facility ImprovementsWest Wyoming / Wyoming, PennsylvaniaJohnston Construction Company performed design-build water treatment facility improvements for the Brown Manor WTF Improvements project in West Wyoming, Pennsylvania.
Industrial and EnvironmentalCharles County LandfillWaldorf, MarylandThe project included design, construction, startup, performance testing, and operation of a landfill leachate pretreatment facility at the Charles County Landfill in Waldorf, Maryland.
Water Treatment PlantsFort Detrick Water Treatment Plant Underdrain Filter ReplacementFort Detrick, Frederick, MarylandJohnston Construction Company performed design-build construction services for the replacement of five underdrain filter systems at the Fort Detrick Water Treatment Plant in Frederick…
Wastewater Treatment PlantsFort George G. Meade WWTP Post-Aeration & Effluent Structures 1 and 2 RehabilitationFort Meade / Laurel, MarylandProvided engineering, design and construction for rehabilitation of two existing post-aeration and effluent structures at the Fort Meade WWTP.
Wastewater Treatment PlantsFort Meade Wastewater Treatment Plant Grit Removal System RehabilitationFort Meade / Laurel, MarylandConcrete Services Division, LLC performed specialized concrete construction for rehabilitation of the grit removal system at the Fort George G. Meade Wastewater Treatment Plant.
Wastewater Treatment PlantsFort Meade Wastewater Treatment Plant Ultraviolet Redundant SystemFort Meade, MarylandJohnston Construction Company provided design-build services for a redundant ultraviolet disinfection system at the Fort Meade Wastewater Treatment Plant.
Water Treatment PlantsFort Meade Water Treatment Plant Flocculation and Sedimentation Basin CoversFort Meade, MarylandJohnston Construction Company provided design-build services for the installation of protective covers over the existing flocculation and sedimentation basins at the Fort Meade Water…
Wastewater Treatment PlantsFort Meade WWTP – Intermediate & Emergency Effluent Pump ReplacementsFort George G. Meade, MarylandJohnston Construction Company was selected by American Water Operations and Maintenance, Inc. to complete the design-build rehabilitation and replacement of the Intermediate and…
Wastewater Treatment PlantsFrederick Digester Mixing EquipmentFrederick, MarylandDelivered a design-build digester mixing equipment project for the City of Frederick Wastewater Treatment Plant.
Wastewater Treatment PlantsHagerstown WWTP – Sludge Storage & Digester Conversion ImprovementsHagerstown, Washington County, MarylandJohnston Construction Company served as the Design-Build Subcontractor for the conversion of existing Secondary Digester No. 2 into an additional sludge holding tank at the Hagerstown…
Water Treatment PlantsNaval Support Activity Annapolis Water Treatment Plant – Water Conservation ProjectAnnapolis, MarylandDelivered a turnkey design-build water treatment plant upgrade at the U.S. Naval Academy, including final design, engineering, permitting, construction, equipment installation…
Water Treatment PlantsSixth Street Water Treatment Plant Sodium Hypochlorite Generation System ReplacementHarrisburg, PennsylvaniaJohnston Construction Company performed design-build construction services for the VWPA Sixth St. WTP Hypo Generation Project in Susquehanna Township, Dauphin County, Pennsylvania.
Water Storage and TanksWaldorf Water Tower #6 – 2 MG Composite Elevated Water Storage TankWaldorf, Charles County, MarylandJohnston Construction Company served as the prime contractor for the design and construction of Waldorf Water Tower #6 for Charles County Government.