our services

Collection & Injection Trenches

Contaminated Groundwater Recovery, Leachate Collection, Slope Stability Interceptor Trenches, Etc...

DeWind’s flagship service “The One-Pass Groundwater Recovery System” (also known as Groundwater Collection Trench or Seepage Trench). This complex multi-tasked One-Pass operation was developed by DeWind exclusively for installing DEEP groundwater and product recovery systems in a single pass. DeWind One-Pass Trenchers are designed to set a large diameter stainless steel sump casing, pre-connected to a horizontal slotted HDPE SDR 11 collection pipe. The sump is set, and the horizontal collection pipe is installed on a precise grade at the bottom of the trench while being backfilled with a wall of stone to the surface. The entire process is performed in a SINGLE simultaneous operation.

One-Pass Trenching Technology avoids the need for DEWATERING, PUMPING AND TREATING OF CONTAMINATED WATER, TRENCH SHORING, SHEETING, DANGEROUS OPEN EXCAVATIONS  and management of large volumes of CONTAMINATED SPOILS! One-Pass installations are fast and safe.

Details:

  • Trench Depths: up to 60′ deep (deeper with benching)
  • Trench Width: ranges 12″- 48″ wide 
  • Installation Speed: 250-500 linear feet per day
  • Benefits: No open excavation, no dewatering, no trench shoring, no mass excavations.

    Can keep backfill down an average of 5 ft from surface if needed. In some cases dual backfill is possible

  •  Typical Smooth & Corrugated HDPE Pipe Diameters: 4”, 5″, 6”, & 8”.  Custom options available up to 24″ (inquire for more details).

Large Diameter HDPE Pipe Installations

DeWind has developed a direct bury attachment that allows precise laser guided installation of large diameter HDPE single wall pipe up to 40 feet below grade in highly fluids soils directly under the water table.

Poly force main pipe and gravity drainpipe up to 24”  diameter can be installed in a single pass without the need for construction dewatering or excavation support . Thousands of feet of pipe can be installed in a single day with this automatic cut and bury trenching method.