Johnson Bros. has been involved with dewatering since 1956. We were one of the first contractors to utilize dewatering systems to dewater borrow pit excavations. One of our early dewatering projects employed the use of a three-stage wellpoint system to dewater 30' below the Mississippi River at Winona, Minnesota.

Prior to 1974, we worked primarily with wellpoint systems. However, after the addition of a full-time dewatering manager in 1974, we expanded our dewatering system to include deep wells and other special techniques.

Today, Johnson Bros. has a full-time dewatering staff which includes three specialists with over 20 years of experience, a graduate hydrogeologist, and an experienced well driller.

Johnson Bros. has dewatering equipment in excess of $1 million. Our inventory includes all necessary equipment for dewatering with wells, wellpoints and sumps. It also includes two drill rigs. Plus, our full-service dewatering shop maintains, as well as fabricates, special dewatering equipment. Recent dewatering projects include:

1) Disney World, Animal Kingdom, Hotel Site Development: 205 deep wells.

2) Universal Studios, “Islands of Adventure.” Well pointing, sump pumping and alum treatment of discharge water.

3) Polk Power Station, Tampa Electric. High-volume sump pumping and wellpointing for structures. Moved in excess of 12.5 billion gallons of water. At times, we used ten, 10" pumps to move 50,000 gallons per minute.

CASE STUDY

Polk Power Station
Mulberry, Florida

Johnson Bros. performed the site civil construction for a new state-of-the art, integrated coal gasification, combined cycle power plant. Johnson Bros. moved 12.6 million yards of earth at the rate of 40,000 yards per ten hour shift. We also moved 12.5 billion gallons of water -- at times using ten, 10" pumps to move 50,000 gallons per minute.

In addition, Johnson Bros. installed 32,000 cubic yards of foundation concrete, 62,400 lineal feet of piping -- ranging in size from 4" to 72" pipe -- and erected 1700 tons of steel for the primary building.