Contractor: Tierdael Construction Company
Contract Amount: $545,545.00
Notice to Proceed: July 22, 2002
Contract Date June 17, 2002.
Duration: 330 calender days
Completion Date: November 19, 2002
Construction of 700 linear feet of 72" diameter RCP pipe, and includes jacking 127 linear feet of 72" RCP. Project includes standard manholes, a special design manhole, and a concrete/riprap outfall structure to the South Platte River, located in Denver's Central Platte Valley.
This project is an example of the latest "trenchless" technologies being used for both storm and sanitary sewer construction and repairs. This particular project involved construction of a new storm sewer system that will eventually connect into an existing storm outfall system in the South Platte River basin. The project will be completed with both open cut construction and jacking technology, as detailed below.
The area near the construction is mostly vacated except for the railroad tracks servicing the area, where 2-30 foot deep pits are dug at ??. Later, equipment will be placed into the pits and the 72" pipe will be pushed through the earth underground, exiting into the receiving pit. Boring is particularly necessary for this section of pipe as it must be placed under the active railroad tracks.
The sending or "jacking" pit is dug just north of the railroad tracks. In it, hydraulic equipment will be placed and will slowly push the sections of pipe into place as the tunnel is hand dug by workers.
There is a tremendous amount of development being done in this often overlooked railroad transportation corridor.
DenverPitView
A combination of 10 and 20 foot steel plates are used to shore up the sides of the pit. The bottom of this pit is prepped by a layer of "rock" on which the equipment will rest. Notice the water accumulating here in the bottom of this pit as the depth of the pit nears the water table in this basin.
A city inspector ("LARS") gives perspective to the size of this section of concrete pipe
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Outfall
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