NH0892 - "T 17 RESET" vertical control mark - Algonquin, IL
Posted by: Groundspeak Premium Member Raven
N 42° 09.931 W 088° 17.624
16T E 393133 N 4668963
Quick Description: This benchmark is embedded in the SW corner of the Algonquin State Bank's building located on 221 S Main St, Algonquin, IL.
Location: Illinois, United States
Date Posted: 10/2/2019 7:20:10 AM
Waymark Code: WM11DEM
Published By: Groundspeak Premium Member Ernmark
Views: 1

Long Description:
As described by the NGS in 1975 (although originally monumented back in 1934):

"ABOUT 0.1 MILE NORTHEAST ALONG STATE HIGHWAY 31 (MAIN STREET) FROM THE CROSSING OF THE CHICAGO AND NORTH WESTERN RAILWAY, AT THE INTERSECTION OF MAIN AND WASHINGTON STREETS, IN THE NORTHWEST FACE OF THE WEST CORNER OF THE BRICK PORTION OF THE ALGONQUIN STATE BANK, 13 FEET SOUTHEAST OF THE SOUTHEAST CURBING OF WASHINGTON STREET. THE MARK IS 4 FT ABOVE SIDEWALK."

Save for the reference to the "Chicago & North Western" railway (which is no longer there), the NGS description is still very accurate. The station is embedded in the Algonquin State Bank building's brick wall, at its West corner (and yes, NW facing side), above 4 ft off the ground.

The NGS' currently posted coordinates ("N 42 09 55.9 W 088 17 37.4", or "N 42° 09.931 W 088° 17.624") were spot on: my measurements were the same based on 10+ readings within 10' accuracy. I believe the NGS recently updated the coords in their database, as well as as posted new photographs of the station based on the pictures I took that day. :) :) :)

The station was recovered in good condition.

---

Below are some basic additional facts, per the NGS database (with some editing for length): (visit link)

NH0892 ***********************************************************************
NH0892 DESIGNATION - T 17 RESET
NH0892 PID - NH0892
NH0892 STATE/COUNTY- IL/MCHENRY
NH0892 COUNTRY - US
NH0892 USGS QUAD - CRYSTAL LAKE (1992)
NH0892
NH0892 *CURRENT SURVEY CONTROL
NH0892 ______________________________________________________________________
NH0892* NAD 83(1986) POSITION- 42 09 55.9 (N) 088 17 37.4 (W) HD_HELD2
NH0892* NAVD 88 ORTHO HEIGHT - 226.95 (+/-2cm) 744.6 (feet) VERTCON
NH0892 ______________________________________________________________________
NH0892 GEOID HEIGHT - -33.723 (meters) GEOID18
NH0892 VERT ORDER - THIRD (See Below)
NH0892
NH0892_MARKER: DV = VERTICAL CONTROL DISK
NH0892_SETTING: 34 = SET IN THE FOOTINGS OF SMALL/MEDIUM STRUCTURES
NH0892_SP_SET: BRICK WALL
NH0892_STAMPING: T 17 1934 RESET 1960 RESET 1975
NH0892_MARK LOGO: NGS
NH0892_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
NH0892+STABILITY: SURFACE MOTION
NH0892_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR
NH0892+SATELLITE: SATELLITE OBSERVATIONS - January 10, 2001
NH0892
NH0892 HISTORY - Date Condition Report By
NH0892 HISTORY - 1975 MONUMENTED NGS
NH0892 HISTORY - 1987 GOOD USPSQD
NH0892 HISTORY - 20010110 GOOD PATRIC
Condition: Mark found in good condition

Designation: T 17 RESET (actual stamping is "T 17 1934 -- RESET 1960 -- RESET 1975")

Benchmark Agency: National Geodetic Survey

Monumentation type: Vertical Control Mark

County: McHenry County

USGS 7.5' Topographic Quadrangle Name (optional): Crystal Lake

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

Web address of this benchmark's datasheet (optional): [Web Link]

NGS PID: NH0892

Benchmark Agency (if other): Not listed

Monumentation type (if other): Not listed

Special category (optional): Not listed

Special Category (if other): 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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Raven visited NH0892 - "T 17 RESET" vertical control mark - Algonquin, IL 5/11/2019 Raven visited it