SEWAGE Level Line (Line 100)

Latitude: N 36°30'31.8"
Longitude: W 116°51'54.0"

Length: 431.1m
Number of Bench marks: 14

Number of Surveys to 2000: 6
Date of Initial Survey: 1 October 1971
Date of Latest Survey: 27 March 2000

Trespass Permission Required:
National Park Service
Death Valley National Park
Death Valley, CA 92328
(714) 786-2331

Directions: From Furnace Creek, proceed north about 2 miles to the entrance to the U.S. Park Service residential area. Turn right, proceed east to Old Ghost Road, turn left and proceed north and around curve to the intersection of Skyline Drive with Old Ghost Road. The center of line is about 50 m north of Old Ghost Road at this poin (Fig. 1).

This line is equally disposed across the geomorphic trace of the Furnace Creek fault on the east side of Death Valley near the old and now abandoned Park Service sewage treatment plant. All bench marks are 1m-long copper-jacketed steel weld rods driven nearly flush to the surface of the desert floor.

Four levelings from January 1971 to March 2000 show no height changes among the 14 bench marks that can be attributed to vertical displacement across the faul (Fig. 2).


Fig. 1. Schematic map of Sewage leveling array across the Furnace Creek fault zone, Death Valley.


Fig. 1. Height changes and topographic profile of bench marks in Sewage leveling array across the Furnace Creek fault zone in Death Valley, Error bars represent one standard deviation. Except for a couple unstable bench marks (106 and 113), the line has been very stable to plus/minus a couple millimeters in 29 years.

Sylvester, A. G., and S. W. Bie, 1986. Geodetic monitoring of fault movements in Death Valley, 1970-1985, pp. 41-44, in Troxel, B. W., editor , Quaternary Tectonics of Southern Death Valley. Field Guide, Pacific Cell, Friends of the Pleistocene, 44 p.



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