Shared Solution

PID: HV8122
Designation: HERO
Stamping: HERO 1987
Stability: Monument will probably hold position well
Setting: Stainless steel rod without sleeve (10FT+ or 3.048M+)
Mark Condition: G
Description: ON THE DAHLGREN,VA NAVY BASE,THE BENCH MARK IS LOCATED ABOUT 9.0 MI EAST-NORTHEAST OF KING GEORGE, 6.7 MI NORTHWEST OF COLONIAL BEACH AND 0.7 MI EAST OF DAHLGREN. THE BENCH MARK HERO IS LOCATED 29.0 M EAST FROM THE EAST EDGE OF THE ABANDONED TAXIWAY, 18.0 M WEST-SOUTHWEST FROM THE SOUTHWEST CORNER OF A 1.2 M SQUARE CONCRETE FOUNDATION FOR A METAL UTILITIES ACCESS DOOR, 17.6 M NORTHEAST FROM THE NORTHEAST CORNER OF A GREEN CONCRETE BUILDING, AND 0.8 M WEST FORM A FIBERGLASS WITNESS POST.
Observed: 2019-04-08T19:03:00Z more obs 2016-08-31
Source: OPUS - page5 1801.18
Close-up View
REF_FRAME:   NAD_83(2011) EPOCH:   2010.0000 SOURCE:   NAVD88 (Computed using GEOID18) UNITS:  m  SET PROFILE   DETAILS
LAT: 38° 19' 51.18132" ±  0.005   m
LON: -77° 2' 19.72280" ±   0.002   m
ELL HT: -28.624 ±   0.003   m
X: 1123633.032 ±   0.002  m
Y: -4882075.116 ±   0.001  m
Z: 3934302.791 ±   0.006  m
ORTHO HT: 4.709 ±  0.040   m
UTM  18 SPC  4501(VA N)
NORTHING: 4244495.169m 2074743.306m
EASTING: 321796.268m 3627750.557m
CONVERGENCE: -1.26480833° 0.91195278°
POINT SCALE: 0.99999111 0.99996083
COMBINED FACTOR: 0.99999560 0.99996532
CONTRIBUTED BY
richard.girard
Center for Operational Oceanographic Products and Services
Horizon View
The numerical values for this position solution have satisfied the quality control criteria of the National Geodetic Survey. The contributor has verified that the information submitted is accurate and complete.