Shattuck Chemical Superfund Site

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Mining Modules, Conveyor and Loadout Structures

Denver, CO - April 10, 2004.
A creative approach to unique site requirements resulted in an integrated series of structures for the Army Corps of Engineers and the EPA at the Shattuck Chemical Superfund Site in Denver, CO.

The Shaw Group, of Centennial, CO tasked with removing approximately 310,000 cubic yards of highly toxic soil, under tight air quality requirements and a constrictive site turned to ASFI to develop a viable solution to fully enclose their remediation works.

ASFI developed a system incorporating a large mobile building integrated with an enclosed conveyer system that runs the length of the site to a load out structure for rail cars.

The remediation structure consists of five (5) 100'W by 460'L by 59'H metal clad modules joined together with four (4) fabric links to form a contiguous 100'W by 368'L enclosed work site. As each 80-foot swath of soil is remediated the structure moves down the 750 ft long site. The front of the structure traverses the site on a "railed relocation system." The system consists of two (2) track bearing wheels on the front of the modules that run on ten (10) L-crane rail tracks mounted on railroad type ties the length of the site and two (2) rubber tired, hydraulically controlled swivel wheels at the back. The rear wheels undulate over the uneven excavated surfaces while maintaining a level platform for the modules. The relocation of the modules is accomplished by use of a series of five electric powered winches mounted on pedestals at the end of the crane rails, which slowly pulls the mining modules forward to their next position. Because the site narrows from one end to the other the fabric links provide adjustment during each move until the structure hits its final position with an overall width of 234'.

A 700-foot long conveyor structure facilitates moving the excavated soil to the load out structure at the back end of the site for loading on to rail cars. The 8'W by 8'H metal clad structure is build in thirty five (35) 20' sections and passes though the end module of the remediation structure. Fabric socks at each pass though point provides an airtight seal. The conveyer structure terminates at a railcar load out structure that is 60'W by 120'L by 27'H, also metal clad.

The remediation structure includes high volume air-handling equipment capable of four air changes per hour with an extensive filtration system and provides negative internal air pressure. Windows, personell and equipment doors, electrical and lighting are fully integrated into all the structures.

ASFI was responsible for the design, fabrication, supply and installation of the structures and integrated components. ASFI has since assisted the client in the successful completion of the first two moves of the remediation structure.

Completion date: March 2003

Client:
The Shaw Group
9201 E. Dry Creek
Centennial, CO 80112