Wellpoints

The wellpoint system is the oldest method of predrainage. In fact, the first practical wellpoint was developed by Moretrench founder Thomas Moore in the early 1920s. Over the last 90 years, Moretrench has successfully completed numerous wellpoint dewatering projects and is recognized as North America's leading wellpoint contractor.

The basic wellpoint system consists of the wellpoints themselves, header piping, and a centrally located pumping station serving the whole system. Wellpoint systems are very cost-effective where close spacing is required. However, as a vacuum-type system, their effectiveness is limited by depth and available suction lift to 15-20 ft. Wellpoint systems are very cost effective where close spacing is required.

Applications

Wellpoints can be installed in a wide range of soils including sands, gravels, silts, soft clays and stratified soils. The most common application is for relatively shallow excavations for new construction or expansion of existing structures, but wellpoints are also proving to be successful in stabilizing wet fly ash and bottom ash ponds at existing or former coal-fired generating stations for fast, safe and effective clean closure in compliance with EPA regulations. See more about Moretrench’s ash pond services here.

Installations

Wellpoints are typically installed around the perimeter of the excavation by self-jetting methods, with a holepuncher used to penetrate coarse gravels and cobbles, and boulders. In difficult ground, penetration can be facilitated by various drilling methods.

From ash pond dewatering at Seward Generating Station to expansion of Colgate University’s Case Library to wellpoint dewatering to aid installation of a Port Authority of New York and New Jersey below-grade Wheel Truing Facility to house high-precision machinery, Moretrench’s project experience as a wellpoint contractor is unparalleled in the industry.

Contact us today to learn of all the dewatering services Moretrench has to offer.