Latitude: N 34°48'46"
Longitude: W 118°54'20"
Length: 410m
Number of Bench marks: 24
Number of Surveys to 2000: 23
Date of Initial Survey: 18 February 1977
Date of Latest Survey: 27 June 1995
Trespass Permission : The level line was established on Mesa Valley
Farm property with permission of the owner at the time, but the farm has
not been inhabited for several years.
Directions:
From the intersection of Interstate 5 and the Frazier Park Road between Gorman
and Lebec, proceed west on the Frazier Park Road about 2 miles to a gate
and an unmarked, unsigned dirt road on the south side of the road. The gate
is locked. The road, which proceeds south about a mile to some power line
stanchions, is impassable. The north-south leg of the level line is along
the east side of the fence that is nearly parallel and about 50 m west of
the power line.
Comments:
This irregular array crosses a wide zone of fault strands in the San Andreas
fault zone northwest of Gorman. Bench marks MV07 through MV24 are on property
belonging to Mesa Valley Farm. Bench marks MV10 through MV18 constitute an
alignment array.
Several bench marks have been added at various times to extend the length
of the line, the most recent being MV01, 02, and 03.
Results:
One of the first surveys of the elongated array is compared with the latest
survey in an accompanying figure. Most of the bench marks are quite stable,
on e to another. Near the fault, bench marks MV11 and MV13 have subsided
up to 10 mm relative to the remainder of the line. MV13 has had a tendency
to rise and fall throughout the history of the line, yet field inspection
reveals no reason to suspect it is loose or periodically disturbed. With
the exception of these unstable bench marks in the middle of the line, no
signficant height change has occurred from one end of the line to the other.
Up one level
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