Open-Cut Streams For Pipeline Projects

Open-Cut Streams For Pipeline Projects

Pipeline projects are one of the most important construction projects in America, Oil and Gas pipelines fuel our economy and keep our country going. There are over 3.5 million miles of rivers and streams in the U.S., covering an enormous and diverse landscape. Rivers supply our drinking water; irrigate our crops; power our cities with hydroelectricity; support fish and other aquatic species; and provide countless recreational and commercial opportunities.

    During the construction of pipelines, many times the contractor is faced with a stream,river,wetland or lake and must come up with a solution to work with and around the existing water. There are a few methods when crossing water one known as Horizontal-Directional Drilling (HDD) Method. Installation of a pipeline by HDD is generally accomplished in
three stages:
• The first stage consists of directionally drilling a small
diameter pilot hole along a designed directional path. The
path of the drilling string is tracked and directed using
surface monitoring systems. The surface monitoring system
determines the location of the drill bit in the hole by taking
measurements from a grid or point on the surface. This

allows the operator to follow the designed directional path.

• The second stage involves enlarging the pilot hole to

a diameter that will accommodate the pipeline. The
enlargement process involves the use of hydraulic cutting
with drill bits and jet nozzles and hydraulic motors (also
called “mud motors”) used to cut harder soils. It can
take several passes to enlarge the hole to the required
diameter, which is typically 12 inches larger than the
pipeline being installed.
• The third stage begins once the pilot hole is enlarged to
the correct size. The section of pipe, prepared in advance,
is pulled back through the hole using the horizontal directional
drilling unit.

Detroit Tarp Inc has developed an environmentally friendly cofferdam to use on the open cut dry method and the Dam & Pump around method.

The open-cut dry-ditch method uses flume pipe(s) to
direct the stream through the disturbed area, which allows
trenching to be done in drier conditions. Detroit Tarp Water Filled
dams are constructed both upstream and downstream
around the work area across the stream channel. Stream
flow is then diverted through the flume pipe allowing the
excavation to occur in the dry, under the flume pipe.

Dam & Pump-Around Method
The pump-around method can act as a substitute to the
open-cut dry-ditch method of construction. It may be
employed on small, low-flow streams where the dry-ditch
method cannot be employed because of site-specific
conditions. In application,Detroit Tarp Water Filled dams are
constructed both upstream and downstream around the
work area across the stream channel. Stream flow is then
diverted around the work area using pumps and hoses.

If you are looking for a cost effective way to de-water a work site Dam Up with Detroit Tarp! 800-457-5054

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