USGS Professonal Paper 1096 - IRIS

MONTANA
Libby, HT
GENERAL INFORMATION
Operated by:
Address:
Department of the Army
Libby Dam Resident Office
Resident Engineer
Star Route 2
Libby, HT 59923
Telephone: In Seattle: 206-764-3711
Address to obtain records:
SITE INFORMATION
Seattle District, Corps of Engineers
Department of the Army
P.O. Box C-3755
Seattle, WA 98124
Code
Station name
Latitude Longitude Elev Date Date
(deg N.) (deg W.) (meters) opened closed
Foundation; geologic age
LDH Libby Dam--------------- 48.45 115.32 838 2/22/70 Open-- Calcareous argillite; Precambrian.
RXF Rexford----------------- 48.86 115.12 1231 10/01/76 --do-- On.
YKH yaak-------------------- 48.86 115.71 1509 10/01/76 --do-- On.
INSTRUMENTATION
Seismometer Galvo Type Magnification
Code TYEe Com~onent T (sec) T (sec) recording ,t T
n g ,
Remarks
LDH: Benioff 4681A-------- Z 1 .0 --- Helicorder --- Telemetered to the powerhouse
at Libby Dam.
RXF • YKM, Ranger SS-I---------- Z 1.0 --- ---do----- --- On.
Timing system:
Kinemetrics DTS-l digital timing system.
System response curves:
Uncalibrated.
SHORT HISTORY
LDM was established to monitor the loca 1 seismicity around the Libby Dam before, during, and after the filling of the
reserVOir. Having supported several other stations run by the University of Montana, the U.S. Army Corps of Engineers decided
in 1976 to ol1erate its own additional stations ond thus oI!ened RXF and YKM.
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