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A benchmark is a permanently affixed mark that establishes the exact elevation of a place. They are used by surveyors in measuring site elevations or as a starting point for surveys.

Benchmarks within the City of Folsom are divided between north and south of Highway 50. North of Highway 50 Benchmarks use the NGVD 29 datum, while those south of Highway 50 use the NAVD 88 datum.

 Benchmarks North of Highway 50
 Benchmark Descriptions - North of Highway 50
 Benchmark Map - North of Highway 50
 Benchmarks South of Highway 50
 Benchmark Descriptions - South of Highway 50
 Benchmark Map - South of Highway 50