Water Tank design and fabrication has been our core business in one fashion or another since 1978. In 1998 Darco Incorporated began manufacturing our patented OcTank polyethylene water storage tank line and also distributing our proprietary fiberglass water storage tanks.

Individual underground tanks range in size from a 4,000 gallon polyethylene OcTank system to our largest standard individual fiberglass vessel at 75,000 gallons.

Multiple tanks can be installed to increase total water storage volume or to create a more desirable "footprint" if space is limited or terrain is difficult at the installation site.

The following list is a selection of projects, customers, engineers, and installation sites which best indicate the diversity and range of our underground water storage tank applications.

ARIZONA

• Imperial National Wildlife Refuge
  (Underground water storage tank for use as a fire cistern / 30,000 gallons)
• Yuma Proving Grounds
  (Recycled water storage and water treatment for base water park "Spray and Play" area)
• Pine / Strawberry Fire Department
  (Fire apparatus pump testing and fire cistern / 12,000 gallons)

BAHAMAS

• Chub Cay / Residential Rain Harvesting
  (Fresh water for individual homes / 8000 gallons)

CALIFORNIA

• Blue Beacon Truck Wash
  (Recycling gray water in an underground tank for reuse / 8000 gallons)
• East LA Civic Center - Water feature in front of Civic Center
  (Underground polyethylene tank used to recycle water for the fountain / 4,000 gallons)
• Controlled Environments Construction Company
  (Ammonia neutralization for refrigerated warehouse fires / 30,000 gallons)

COLORADO

• Ameristar Casino
  (Direct bury underground holding tank for fire protection)
• Larkspur Subdivision
  (Potable water for domestic use in new subdivision / 180,000 gallons)
• Payton High School
  (Underground fiberglass holding tank for potable water / 40,000 gallons)
• River Island Ranch - New Development
  (Four separate underground water tanks for fire protection / 120,000 gallons)
• Visintainer Sheep Ranch
  (Agricultural and livestock underground water supply fed by windmills / 12,000 gallons)
• Waste Management Corp.
  (Water supply for landfill compaction and road maintenance / 60,000 gallons)

FLORIDA

• El Dorado Subdivision
  (Fiberglass water tank used to create a fire cistern for the subdivision / 32,000 gallons)
• Florida Keys / Residential Rain Capture
  (Fresh water for individual homes / 4000 gallons)

GEORGIA

• Cooper Residence - Residential Rain Water Harvesting System
  (Underground polyethylene rain water tank for landscape irrigation / 16,000 gallons)

IDAHO

• Camp Camorah
  (Potable water for church camp / 24,000 gallons)
• Southfork Lodge / Snake River Environmental Impact
  (Constructed wetland pilot project - wastewater treatment tanks / 12,000 gallons)

ILLINOIS

• Valley High Nursing Home
  (Fire Sprinkler Reservoir to augment city water line supply / 30,000 gallons)

KANSAS

• Hong Cong Buffet
  (Storm water detention in large parking area / 70,000 gallons)

MARYLAND

• R.W.K.S. Engineering
  (Rural land development, fire cistern / 20,000 gallons)

MICHIGAN

• Big Fish Environmental Tipping Station
  (Sewage holding tank for wastewater treatment of septic effluent / 20,000 gallons)

MISSOURI

• Frontenack Engineering
  (Rural land development fire cistern / 60,000 gallons)

NEW HAMPSHIRE

• M.S.C. Engineering
  (Rural land development, fire cistern / 20,000 gallons)

NEW MEXICO

• Vermejo Park Ranch
  (Potable water storage for guest ranch / 80,000 gallons)
• Desert Rain Systems
  (Rain capture systems for landscape irrigation / sizes 4,000 to 10,000 gallons)

NEW YORK

• Millbrook High School
  (Underground water holding tank for fire sprinklers / 30,000 gallons)
• Wampanoag Indian Tribe – Martha’s Vineyard Island
  (Fire cistern for Tribal buildings / 15,000 gallons)

NORTH CAROLINA

• NC State-Dole Nutrition Center and UNC Laboratories
  (Gray water reuse - recycling restroom sink water for toilet flushing / 8,000 gallons)
• National Forests of North Carolina
  (Potable water supply in remote campgrounds / 2 sites at 2,000 gallons)

OHIO

• Grace Baptist Church
  (Direct bury water tank for the church fire sprinkler system / 20,000 gallons)
• Sammis Generating Station - Bechtel Power Group
  (Wastewater treatment tank used during power plant construction / 15,000 gallons)

PENNSYLVANIA

• UL Gordy Elementary School
  (Underground fiberglass tanks used for storm water management / 111,000 gallons)
• C.F.L. Mechanical Inc.
  (College pool backwash storage tank / 10,000 gallons)

SOUTH CAROLINA

• Furman University & Cliffs Community Homes - 3,000 sq.ft. "Green Built" model home
  (Underground tanks used for rain storage and organic garden irrigation / 12,000 gallons)

TENNESSEE

• Scarlett Residence
  (Residential underground rain water cistern for irrigation tank / 30,000 gallons)
• The Elephant Sanctuary
  (Rain water collection for elephant habitat / 40,000 gallons)

TEXAS

• Mission Pharmacol
  (Storage & treatment of washdown water in a pharmaceutical plant / 8,000 gallons)

UTAH

• Canyonlands National Park
  (Direct bury fiberglass tank for potable water / 30,000 gallons)
• Ken Dee Ranch - Horse barn, riding arena and guest house
  (Underground water storage for potable water and back-up fire protection / 60,000 gallons)
• Highland Construction
  (Domestic water storage for a rural subdivision / 100,000 gallons)
• Wilson Arch Resort
  (Fiberglass water tanks storing domestic water for resort / 60,000 gallons)
• San Juan County Emergency Services
  (Water supply for fire fighting and road construction / 6 sites, each 10,000 gallons)

VIRGINIA

• Ferring Residence
  (Residential rainwater capture system used for irrigation and fire protection / 8,000 gallons)

WYOMING

• Hat Butte Ranch
  (Residential underground cistern tank for potable water and back-up fire cistern / 20,000 gallons)
• Laramie County Community College
  (Rain capture for landscape irrigation on the campus grounds / 40,000 gallons)
• Wyoming Department of Transportation
  (Highway “Rest Stop” potable water supply / 8,000 gallons)

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