Sonora Municipal Code § 1.12 Bench Mark and Datum Plane

The official bench mark, or point determining elevations for the city is fixed and adopted as that certain bench mark of the U.S. Geological Survey: a copper disc bearing on its face the words, "U.S. Geological Survey B. M. Elev. 1825," located in the easterly retaining wall of the courthouse of Tuolumne County just south of the steps on Green Street.

(Ord. 78 § 1, 1919.)

The official datum plane of the city is fixed and adopted as a horizontal plane located one thousand eight hundred twenty-five feet below the U.S. Geological Survey bench mark referred to in Section 1.12.010.

(Ord. 78 § 2, 1919.)

The elevations of all walks, curbs, gutters, paving, sewers, storm drains, culverts, walls, or the grades thereof, or all other public structures constructed or erected, or to be constructed or erected in the city shall be referred to the datum plane.

(Ord. 78 § 3, 1919.)