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Survey Information
Centerline Ties
Centerline Ties

Centerline ties are survey lines that connect a point to other surveyed lines to determine the center of an intersection.  Locations of City of Signal Hill centerline ties can be seen on the Centerline Tie Index.  Individual centerline ties can be seen or printed from the following links:

Centerline Ties 1-50
Centerline Ties 51-100
Centerline Ties 101-150
Centerline Ties 151-200
Centerline Ties 201-238

Note: Some centerline ties could not be scanned.  Please visit the Public Works Department to see those not listed here.


A benchmark is a survey mark made on a monument having a known location and elevation, serving as a reference point for surveying.  Locations of City of Signal Hill benchmarks can be seen on the Benchmark Index.

Individual Benchmarks can be seen or printed from the following links:

Benchmarks 001-050
Benchmarks 051-100
Benchmarks 101-150
Benchmarks 151-186

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