Dutchland, Inc. manufactures and constructs high quality precast concrete systems and products. Precast concrete, including post-tensioned concrete, is superior to structures such as poured-in-place concrete, shot-crete coated structures (ESPECIALLY AWWA D110 WATER TANKS), steel, and fiberglass. Precast concrete is fabricated in a temperature controlled environment. Reinforcing formations are set up in the molds and spaced precisely as required. Precast concrete walls are cast at "finished thickness" rather then having multiple layers applied to create a wall (called the onion skin effect). Other tank manufacturers (AWWA D110) build tanks in multiple layers and require a steel diaphragm between layers to prevent leaking! Precast concrete is not subject to rust associated with steel structures. High maintenance costs such as dewatering, sand blasting, coating, refilling, and downtime are generally not associated with precast concrete. Precast concrete is highly competitive and many times costs less than steel and cast-in-place concrete. This is especially true when compared to AWWA D110 tanks (the onion skin tanks). INFORMATION AND PHOTOS Click below for specific information and to view photo galleries for the products we manufacture and construct. WASTEWATER TREATMENT PLANTS CIRCULAR WATER TANKS (AWWA D115) PUMPING STATIONS BOX CULVERTS, VAULTS, AND MORE ADDITIONAL INFORMATION An open letter from an engineer involved with writing AWWA standards discusses the differences between AWWA D110 Tanks and AWWA D115 Tanks. Precast Concrete versus other types of structures, including life cycle analysis estimates of steel wastewater treatment plants and water tanks. Our Product List Post-Tesioning Defined, By the Post-Tensioning Institute (PDF)