Frequent bench marks shall be established along the line, on permanent objects, and their elevation recorded in the field books.
Bench marks
Va. Code Ann. § 21-328, under Chapter 6. Drainage Projects..
Va. Code Ann. § 21-328
Va. Code Ann. § 21-328, under Chapter 6. Drainage Projects..
Va. Code Ann. § 21-328
Frequent bench marks shall be established along the line, on permanent objects, and their elevation recorded in the field books.
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