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 Plants6th Street Water Treatment PlantHarrisburg, PennsylvaniaDesign-Build 6th Street water treatment plant construction and upgrades.
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 StationsAmber Meadows Pump StationFrederick, MarylandDesign-Build Amber Meadows wastewater pump station construction.
Wastewater Treatment PlantsArmstrong Wastewater Reclamation Plant UpgradeMarietta, PennsylvaniaDesign-Build wastewater reclamation and recycling for a ceiling tile manufacturing plant.
Water Treatment PlantsBear Trap Water Treatment PlantFrankford, DelawareDesign-Build construction of the Bear Trap 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.
Wastewater Treatment PlantsElk Neck State Park Wastewater Treatment PlantCecil County, MarylandDesign-Build wastewater treatment plant upgrades at Elk Neck State Park.
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 PlantsFrederick Wastewater Treatment Plant Digester Mixing SystemFrederick, MarylandDesign-Build digester mixing system for the 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…
Wastewater Treatment PlantsLittle Patuxent Wastewater Treatment Plant ADI Demolition, Excavation and MechanicalSavage, MarylandDemolition, excavation and mechanical construction at Little Patuxent wastewater treatment plant.
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…
Wastewater Treatment PlantsNorthrop Grumman Systems Corporation AIMS WWTP Design-BuildLinthicum, MarylandDesign-Build industrial wastewater pretreatment for Northrop Grumman.
Water Treatment PlantsPotomac Water Filtration Plant Chemical Feed FacilitiesPotomac, MarylandDesign-Build chemical feed facilities for the Potomac Water Filtration Plant.
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.
Wastewater Treatment PlantsSolar Power Industries, Inc. WWT System Design-BuildBelle Vernon, PennsylvaniaDesign-Build installation of an industrial wastewater treatment system.
Water Treatment PlantsThe Trails at Beaver Creek Water Treatment Plant Upgrade Design-BuildHarbeson, DelawareDesign-Build water treatment plant upgrade for the Trails at Beaver Creek.
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.
Wastewater Treatment PlantsWSSC Energy Conservation Measures Design-BuildAccokeek, Upper Marlboro, and Laurel, MarylandDesign-Build energy conservation work at Washington Suburban Sanitary Commission facilities.