Design and Construction of Support Infrastructure for a New Quarry in Lee County, Alabama Download

Description:

By W. Robert Thompson, III, P.E. – Dan Brown and Associates, LLC; Sheryle G. Reeves, P.E. – TTL, Inc. and John W. Grabar – Florida Rock Industries, Inc.

Abstract

Florida Rock Industries, Inc. (FRI) began investigating the development of an aggregate quarry in Lee County in eastern Alabama in 2000.  Planning for the site required locating storm water detention ponds, a processing plant, the plant rail trackage, truck scales and planned limits of the quarry pit without infringing on the required undisturbed property perimeter buffer areas.  The quarry and processing facilities were designed to accommodate local aggregate sales by truck and railcar shipments of up to 90-railcar unit trains.  The two major issues for the planned rail facilities were: 1) the site grading required to optimally fit the required trackage onto the available quarry site area; and 2) the required grade crossing of a state highway to connect the plant trackage to the CSX mainline.  The selected two-track loop configuration for the plant trackage required cuts of up to 30 feet and fills of up to 60 feet.  Because of the relatively confined site area and the nearby retention ponds, slopes as steep as 2.5:1 (H:V) were required for the greater fill sections to fit the trackage in the available footprint.  The construction of the lead track required the use of soil nails to stabilize the existing rail bed, compaction grouting to stabilize the subgrade, and a heavy duty MSE wall system for the lead track transition embankment.  The design team worked closely with FRI throughout the development, design and construction process.  Open communication between the various design consultants was critical to developing a workable design that overcame the challenges at the site.   FRI's careful selection of qualified, experienced engineers, consultants, and contractors was the significant contribution to the success of the project. 

Submitted On:

22 Apr 2009

Submitted By:

Randy Post (rockman)

File Date:

22 Apr 2009

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836.58 Kb

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pdf

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