(T-31.) [Processed. The descriptions and elevations of tidal bench marks in this publication supersede those given in Special publication 119, Tidal bench marks, District of Columbia, published in 1925.]
Notes:
(T-31.) [Processed. The descriptions and elevations of tidal bench marks in this publication supersede those given in Special publication 119, Tidal bench marks, District of Columbia, published in 1925.] ‡ Official Use. Not Available.