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Title:

Overcoming an Environmental Surprise with Innovative, Fast-Track Technology: Case History Along I-69 Through Tennessee

Accession Number:

01477680

Record Type:

Component

Availability:

Transportation Research Board Business Office

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Washington, DC 20001 USA
Order URL: http://www.trb.org/Main/Blurbs/169641.aspx

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Order URL: http://worldcat.org/isbn/9780309263443

Abstract:

As the Tennessee Department of Transportation (DOT) was finalizing the future route of I-69 through northwest Tennessee, a previously unknown, unregulated landfill was discovered directly beneath the proposed route near its juncture with a continuing segment into Kentucky. The Tennessee DOT, cooperating with the Tennessee Department of Environment and Conservation, implemented a rapid-response, technology-driven strategy to assess the potential costs and liabilities of crossing the landfill versus avoiding it. After a concerted site-history investigation, an electromagnetic geophysical survey mapped the landfill boundaries, established the area of fill, and identified areas of higher metal content within the fill. A concurrent soil–gas survey showed only isolated patterns of volatile organic compounds, often a driver for environmental mitigation costs. These results were used to optimize locations for subsurface drilling that employed the waste-minimizing sonic drilling technique. Depth of fill from exploratory drilling was combined with the geophysical delineation of landfill boundaries to yield an estimated waste volume of 65,000 m3 (85,000 yd3) within the proposed I-69 footprint. Chemical analyses were done for subsurface sonic rig soil cores, surface soil samples, the contents of drums scattered across the surface, and surface water. These analyses showed relatively modest environmental risk; it was suggested that if the landfill were excavated, most of the soil could be handled as nontoxic special waste. Nevertheless, considering both design–build factors and environmental issues, the cost of excavating and building through the landfill ($33.5 million) exceeded that of rerouting slightly east of the landfill ($29.5 million), and the route was diverted to avoid the landfill.

Monograph Accession #:

01495199

Report/Paper Numbers:

13-2182

Language:

English

Authors:

Hughes, Larry J
Epperson, Ann
Williams, Tammy Keim

Pagination:

pp 16-22

Publication Date:

2013

Serial:

Transportation Research Record: Journal of the Transportation Research Board

Issue Number: 2349
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

9780309263443

Media Type:

Print

Features:

Figures (6) ; Maps; Photos; References (5) ; Tables (2)

Geographic Terms:

Subject Areas:

Environment; Geotechnology; Highways; Materials; Pavements; Planning and Forecasting; I15: Environment; I21: Planning of Transport Infrastructure

Files:

PRP, TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:29PM

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