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Michigan DOT Height Modernization Mark 82635
Posted by: Groundspeak Premium Member DougPeterson
N 42° 19.664 W 083° 18.700
17T E 309533 N 4688753
Quick Description: This Michigan DOT Height Modernization Mark 82365 is located on the west side of Inkster Road and a block north of Ford Road. The witness post is missing. The mark was placed in 2006.
Location: Michigan, United States
Date Posted: 7/17/2012 6:51:07 PM
Waymark Code: WMEXD4
Published By: Groundspeak Premium Member Ernmark
Views: 12

Long Description:
This mark is not included with benchmarks in Geocaching.com but does have an NGS data sheet. The data sheet is included below.

PID DI6434
STATE/COUNTY MI/WAYNE
USGS QUAD INKSTER (1983)

Current Survey Control

--------------------------------------------------------------------------------
NAD 83(2007) 42 19 39.83232(N) 083 18 41.99759(W) ADJUSTED
NAVD 88 192.050 (meters) 630.08 (feet) ADJUSTED

--------------------------------------------------------------------------------
EPOCH DATE 2002.00
X 550,043.513 (meters) COMP
Y -4,690,539.133 (meters) COMP
Z 4,272,693.145 (meters) COMP
LAPLACE CORR -2.77 (seconds) DEFLEC09
ELLIP HEIGHT 157.795 (meters) (06/10/07) ADJUSTED
GEOID HEIGHT -34.27 (meters) GEOID09
DYNAMIC HT 191.994 (meters) 629.90 (feet) COMP
MODELED GRAV 980,324.3 (mgal) NAVD 88

HORZ ORDER FIRST
VERT ORDER SECOND CLASS I
ELLP ORDER FOURTH CLASS I

The horizontal coordinates were established by GPS observations and adjusted by the PATRICK ENG INC in June 2007.

The datum tag of NAD 83(2007) is equivalent to NAD 83(NSRS2007). See www.ngs.noaa.gov/NationalReadjustment for more information.

The horizontal coordinates are valid at the epoch date displayed above which is a decimal equivalence of Year/Month/Day.

The orthometric height was determined by differential leveling and adjusted in July 2007.

The X, Y, and Z were computed from the position and the ellipsoidal ht.

The Laplace correction was computed from DEFLEC09 derived deflections.

The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.

The geoid height was determined by GEOID09.

The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).

The modeled gravity was interpolated from observed gravity values.

North East Units Scale Fact r Converg.
SPC MI S 92,487.543 4 086,951.380 MT 0.99995386 +0 ' 43 04.7"
SPC MI S 303,436.82 13 408,633.14 iFT 0.99995386 +0 ' 43 04.7"
UTM 17 4,688,752.911 309,533.911 MT 1.00004637 -1 ' 33 25.5"

Elev Factor x Scale Factor = Combined Factor
SPC MI S 0.99997525 x 0.99995386 = 0.99992911
UTM 17 0.99997525 x 1.00004637 = 1.00002162



Superseded Survey Control
NAVD 88 (06/10/07) 192.05 (m) 630.1 (f) LEVELING 3


Superseded values are not recommended for survey control. NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums. See file dsdata.txt to determine how the superseded data were derived.


Marker Information
U.S. NATIONAL GRID SPATIAL ADDRESS: 17TLG0953388752(NAD 83)

Marker Information
MARKER: DD = SURVEY DISK
SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
STAMPING: 82635 2006
MARK LOGO: MIDT
PROJECTION: FLUSH
MAGNETIC: N = NO MAGNETIC MATERIAL
STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
SATELLITE: SATELLITE OBSERVATIONS - May 24, 2006

History
Date Condition Report By
20060524 MONUMENTED MIDT

STATION DESCRIPTION
DESCRIBED BY MICHIGAN DEPARTMENT OF TRANSPORTATION 2006 (JDB) THE STATION IS LOCATED 2.1 MILES (3.38 KILOMETERS) SOUTHWEST OF DEARBORN HEIGHTS, 1.0 MILE (1.61 KILOMETERS) EAST OF GARDEN CITY, AND 6.4 MILES (10.3 KILOMETERS) NORTHWEST OF TAYLOR, LOCATED WEST OF INKSTER ROAD AND BETWEEN BEECHWOOD STREET AND STATE HIGHWAY M-153 (FORD ROAD). TO REACH THE STATION FROM THE JUNCTION OF STATE HIGHWAY M-153 (FORD ROAD) WITH INKSTER ROAD, GO NORTH ON INKSTER ROAD FOR 0.1 MILES (0.16 KILOMETERS) TO THE STATION ON THE LEFT. THE STATION IS A 4 INCH (10 CENTIMETER) HEIGHT MODERNIZATION STATION DISK STAMPED 82635 2006 SET IN A 16 INCH (41 CENTIMETER) DIAMETER CONCRETE POST FLUSH WITH THE GROUND. THE STATION IS 26.5 METERS (86.9 FEET) SOUTH OF THE CENTERLINE OF BEECHWOOD STREET, 14.7 METERS (48.2 FEET) SOUTH-SOUTHWEST OF THE CENTER OF A CATCH BASIN, 11.4 METERS (37.5 FEET) NORTHEAST OF THE SOUTHEAST CORNER OF BEECHWOOD CLINIC ADDRESS--5755--, 1.6 METERS (5.1 FEET) WEST OF THE BACK OF A CURB, AND 0.99 METERS (3.2 FEET) EAST OF A CARSONITE WITNESS POST
Condition: Mark found in good condition

Designation: 82365

Benchmark Agency: other (not included below)

Benchmark Agency (if other): Michigan Department of Transportation

Monumentation type: Disk (unspecified type)

County: Wayne County

USGS 7.5' Topographic Quadrangle Name (optional): Inkster

Find type: Coordinates and/or to-reach information from the NGS database (or Geocaching's copy of it) were used

NGS PID: DI6434

Monumentation type (if other): Not listed

Special category (optional): Not listed

Special Category (if other): Not listed

Web address of this benchmark's datasheet (optional): Not listed

Local database's URL (optional): Not listed

Visit Instructions:
  1. A closeup photo of the mark taken by you is required.
  2. A 'distant' photo including the mark in the view is highly recommended. Include the compass direction you faced when you took the picture.
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