Not sure why the NGS folks are fond of unmarked points as benchmarks, but this is one of two that we found in DC.
The benchmark is an unmarked point on the northeast corner of the Jphn paul Jones Memorial at West Potomac Park.
From the NGS Datasheet: (
visit link)
"HV1848 DESIGNATION - PAUL JONES
HV1848 PID - HV1848
HV1848 STATE/COUNTY- DC/DISTRICT OF COLUMBIA
HV1848 USGS QUAD - WASHINGTON WEST (1983)
HV1848
HV1848 *CURRENT SURVEY CONTROL
HV1848 __________________________________________________________________
HV1848* NAD 83(1986)- 38 53 18. (N) 077 02 21. (W) SCALED
HV1848* NAVD 88 - 3.060 (meters 10.04(feet) ADJUSTED
HV1848
HV1848_PROJECTION: FLUSH
HV1848_MAGNETIC: N = NO MAGNETIC MATERIAL
HV1848_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
HV1848_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR
HV1848+SATELLITE: SATELLITE OBSERVATIONS - May 13, 1992
HV1848
HV1848 HISTORY - Date Condition Recov. By
HV1848 HISTORY - UNK MONUMENTED CGS
HV1848 HISTORY - 1941 GOOD CGS
HV1848 HISTORY - 1956 GOOD CGS
HV1848 HISTORY - 19920513 GOOD NGS
HV1848 HISTORY - 19980928 GOOD NGS
HV1848
HV1848 STATION DESCRIPTION
HV1848
HV1848''DESCRIBED BY COAST AND GEODETIC SURVEY 1941
HV1848''AT WASHINGTON.
HV1848''AT WASHINGTON, IN WEST POTOMAC PARK, AT THE FOOT OF SEVENTEENTH
HV1848''STREET, AT THE JOHN PAUL JONES MONUMENT, ON THE NORTH SIDE OF
HV1848''THE MONUMENT, ON THE NORTHEAST CORNER OF THE PROJECTING WALL AT
HV1848''THE WEST END OF THE STEPS, AND ABOUT 2 FEET ABOVE THE SIDEWALK.
HV1848''AN UNMARKED POINT.
HV1848
HV1848 STATION RECOVERY (1956)
HV1848
HV1848''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956
HV1848''RECOVERED IN GOOD CONDITION.
HV1848
HV1848 STATION RECOVERY (1992)
HV1848
HV1848''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992
HV1848''IN WASHINGTON, D.C., AT THE INTERSECTION OF 17TH STREET AND
HV1848''INDEPENDENCE AVENUE, THE POINT LEVELED WAS THE NORTHEAST CORNER OF
HV1848''THE PROJECTING WALL AT THE WEST END OF THE STEPS ON THE NORTH SIDE OF
HV1848''THE JOHN PAUL JONES MONUMENT NEAR THE CENTER OF A TRIANGLE FORMED BY
HV1848''THE INTERSECTION, AND 0.3 M (1.0 FT) ABOVE THE LEVEL OF A SIDEWALK.
HV1848
HV1848 STATION RECOVERY (1998)
HV1848
HV1848''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1998 (RLA)
HV1848''RECOVERED AS DESCRIBED."