The process in which the contractor uses
a type of 'rake" with teeth or springs on it to drag across the
surface to make minor grooves in the concrete. These grooves improve
traction of vehicles on the new concrete.
Retaining Wall: A retaining wall is usually poured solid
concrete. A gravity block retaining wall is made up of individual
blocks that are stacked upon each other. This is a pretty basic
The "chute" is an old river channel that has filled with
sediment over the years.
As part of our contract, the agencies
requested that this chute be excavated, so as to provide a backwater
situation. The purpose of the chute is to provide additional habitat
for fish and wildlife, while providing a close and easily accessible
place to get fill material. This material is being used to build
the approach to the bridge.
Future plans for the chute are to open
the upper (West) end. Which will create a flowing water situation.
The agencies believe that this may create a suitable spawning environment
for pallid sturgeon and other fish species.
The NPS plans on building a trail system
thru this newly acquired ROW, South of the chute.
Cell: The "O"
Cell is 3 separate hydraulic jacks for use in determining the final
elevation of the production shafts. They were placed 27 ft from
the bottom of the rebar cage. This distance can vary from shaft
NOTE: As the rebar
cage is lowered into the ground, the employees of Load Test and
Jensen Construction Co. check the load cell analyzers, wires, and
hydraulic lines on the way down, and remove bracing and install
Tremie: The tremie is a water tight funnel to get the concrete to the bottom
of the shaft without contamination. It stays a minimum of 5 ft into
the concrete at all times. As the shaft is filled with concrete
the water is forced up and pumped out of the shaft. The tremie is
approximately 120' long in a 112' shaft, and is guided into the
middle of the shaft with an extra steel "funnel", which
also helps support the two halves of the rebar cage.