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Bridges & Structures

 

Interstate Technical Group on Abandoned Underground Mines
An Interactive Forum

Locating and Characterizing Abandoned Mines Using Microgravity: Figure 1


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Map of coal reserve area

Figure 1. Map of coal reserve area showing grid of 2-D seismic survey lines and location of 3-D survey conducted

Updated: 06/29/2015
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000