1. ERDC Knowledge Core
2. Pre - Engineer Research and Development Center (ERDC)
3. Geotechnical Laboratory - (4/16/1978 - 2/22/2001)
4. Technical Publication
5. Non-Series Report

Title:	Detection of shallow tunnels emplaced in unconsolidated sediments
Authors:	Rechtien, Richard D.
Keywords:	Tunnels Tunnel detection Arizona
Publisher:	Geotechnical Laboratory (U.S.) Engineer Research and Development Center (U.S.)
Description:	Report Introduction: In the summer of 1986 a serious effort to develop seismic instrumentation for the detection of clandestine underground tunnels was initiated by the U.S. Army Belvoir Research, Development and Engineering Center, Ft. Belvoir, VA, under the direction of Mr. Ray Dennis, and by USAE Waterways Experiment Station, Vicksburg, MS, under the direction of Mr. Bob Ballard. Following an extensive period of system development and proof of concept testing, the system was finally accepted by the U.S. Eighth Army and deployed in the Republic of Korea in the summer of 1990. During the testing stages of the instrument over known tunnels in the Republic of Korea considerable experience was acquired relative to the identification of the seismic signature of a tunnel. While tunnels in Korea are found in hard rock, the experience of discovering what can and cannot be seen by seismic energy probes, as viewed from the perspective of small tunnel targets, nevertheless can be readily applied to other types of host earth materials as well. Consequently, when a tunnel, reportedly used for the smuggling of drugs, was discovered under the U.S.-Mexico border in Douglas, AZ in the summer of 1989 by the U.S. Customs Service, an investigation was launched with the aim of adapting the tunnel experience of Korea to the problem of tunnel detection along the U.S.-Mexican border
Rights:	Approved for public release; distribution is unlimited.
URI:	http://hdl.handle.net/11681/3082
Appears in Collections:	Non-Series Report