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Details for Benchmark: ME1954

N 41° 35.016 W 087° 43.848 (NAD 83)

Altitude: 685.98

Coordinates may not be exact. Altitude is ADJUSTED and location is ADJUSTED. (more info)

Location:
In COOK county, IL View Original Datasheet
Designation:
TRYNER 2
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

Must Read!

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Found in good condition.

[Photos:]
photoME1954
photoSetting

My 200th benchmark find! That is, my 200th according to the geocaching website. I have already passed 200 by finding marks that aren’t in their database, but are reportable to the NGS. Sorry for the long log.

Background: I always assumed this area was a farm, and part of it still is. But after seeing some ‘land for sale’ type of signs in the past, I figured this land was pretty much going to be in abandoned condition. Today I parked by the Loew’s theater to the east and from the nearby dead-end road, I followed some tire tracks most of the way thru this field. Many plywood stakes with pink flagging tape adorn the field; clearly this area will soon be developed.

Upon nearing GZ, the weeds, wildflowers, and prairie grasses were waist-high or higher, but I made my way through. Right there amid a bunch of high prairie plants sits Tryner 2, complete with witness post and also a plywood stake with pink tape. The mark is in good shape.

To its south I found a reference mark; it is stamped TRYNER 2 NO 2 and has a witness post. Over the second “2” is stamped the number 5. So obviously this was the original reference mark #2 but had been re-used for Tryner 2. EDIT: per a recovery report in 1967, RM2 was re-stamped and re-designated RM5. I will still log RM2 as found.

I sought RM1 with no luck. I even checked out the coords provided for the RM’s per the NGS, but nothing was there & that’s no surprise. I also checked out some of the other plywood stakes to find nothing.

As I was heading out from the field, a fella in a combine was passing the edge of the field from south to north. As I was about to exit the area of the waist-high prairie plants, he happened to be right there with the combine. I waved at him, but then he stopped. Dang I thought he was gonna yell at me. Long story short, he is a nice fella named Jerry. He thought I was “working on Sunday” as a surveyor. I told him I was just a hobbyist and volunteer seeking the marks. He is aware of the marks in the area, and even told me that he thinks the other mark (RM1) may be gone. I apologized in case I was trespassing and he shook his head -- he didn’t mind and was absolutely cool about me being out there. He further told me about the history of the land and the previous owners (they were politically connected and thus avoided having their land taken over by an I-57 & I-80 interchange), and how the area around the benchmarks will soon be a neighborhood.

He also showed me what different plants were in the area, and he was mowing down the Ethiopian grass to bale it and feed it to some cattle. In chatting about many things, I also found out I know his sister from the place I used to work!

Jerry’s a nice fella. I wouldn’t say the land is open to all, but again he was cool about me being out there. I wish I could have found all the marks related to this one, but this milestone find is exactly why I like BM hunting: for the history and for chatting to people like Jerry who gave me more insight about the whole place. See pics.

[This entry was edited by CoyoteTrust on Monday, August 25, 2008 at 12:15:42 AM.]

[Photos:]
photoME1954
photoME1954 setting
photoME1954 overview - viewing NE toward mark
photoME1954 - viewing east from the mark

Documented History (by the NGS)

01/01/1959 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1959 (RWE) THE STATION IS LOCATED ABOUT 2 MILES SOUTHWEST OF MARKHAM, ABOUT 1-1/2 MILES SOUTH-SOUTHEAST OF OAK FOREST AND 0.2 MILE EAST OF STATE HIGHWAY 50. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 6 AND STATE HIGHWAY 50 (CICERO AVENUE), IN THE NORTHEAST EDGE OF OAK FOREST, GO SOUTH ON CICERO AVENUE FOR 1.0 MILE TO 167 TH STREET, TURN LEFT AND GO EASTERLY ON 167TH STREET FOR 0.55 MILE TO THE JUNCTION OF BRENNAN HIGHWAY, TURN RIGHT AND GO SOUTHWEST ON BRENNAN HIGHWAY FOR 0.25 MILE TO A DIM FIELD ROAD LEFT, TURN LEFT AND GO SOUTHERLY FOR 0.15 MILE TO THE STATION ON THE LEFT AS DESCRIBED. THE STATION IS A STANDARD MARK DISK SET IN THE TOP OF A 12 BY 12 INCH CONCRETE POST PROJECTING ABOUT 3 INCHES AND THE DISK IS STAMPED TRYNER 2 1959. IT IS 50 FEET SOUTHWEST OF A DOUBLE TRUNK TREE, 30 FEET NORTHEAST OF TREE AND 4.7 FEET NORTH-NORTHEAST OF WITNESS POST. REFERENCE MARK NO. 1 IS A STANDARD REFERENCE MARK DISK SET IN TOP OF A 12 BY 12 INCH CONCRETE POST PROJECTING ABOUT 4 INCHES AND THE DISK IS STAMPED TRYNER 2 NO 1 1959. IT IS 33.2 FEET NORTHEAST OF WITNESS POST AND 20 FEET SOUTHWEST OF DOUBLE TRUNK TREE. REFERENCE MARK NO. 2 IS A STANDARD REFERENCE MARK DISK SET IN TOP OF 12 BY 12 INCH CONCRETE POST PROJECTING ABOUT 4 INCHES AND THE DISK IS STAMPED TRYNER 2 NO 2 1959. IT IS 15.4 FEET SOUTHWEST OF WITNESS POST AND 10.5 FEET NORTHEAST OF TREE. AZIMUTH MARK IS A STANDARD AZIMUTH MARK DISK SET IN TOP OF A 12 BY 12 INCH CONCRETE POST PROJECTING ABOUT 3 INCHES AND THE DISK IS STAMPED TRYNER 2 1959. IT IS 48 FEET WEST OF APPROXIMATE CENTER OF STATE HIGHWAY 50, 85 FEET SOUTH OF POWER LINE POLE AND 1.8 FEET EAST OF WITNESS POST. NOTE- TRIANGULATION STATION TRYNER 1944 1956 WAS DESTROYED AFTER THE TRAVERSE CONNECTION WAS MADE. HEIGHT OF LIGHT ABOVE STATION MARK 30.10 METERS.
01/01/1959 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 1.9 MI S FROM OAK FOREST. ABOUT 1.45 MILES SOUTH ALONG STATE HIGHWAY 50 FROM ITS JUNCTION WITH U.S. HIGHWAY 6 IN OAK FOREST, THENCE 0.3 MILES NORTHEAST ALONG BRENNAN ROAD, THENCE 0.15 MILE SOUTH ALONG A ROW OF TRES SEPARATING TWO FIELDS, AT THE CENTER OF A GAP IN THE LINE OF TREES WHICH IS THE HIGHEST PART OF THE HILL AT THE TREE LINE, 565 FEET SOUTH ALONG THE ROW OF TREES FROM THE CENTER LINE OF BRENNAN ROAD, 30 1/2 FEET NORTH OF A CHERRY TREE WITH LOW SPREADING BRANCHES, 49 FEET SOUTH OF A TWIN TRUNK CHERRY TREE, 4.7 FEET NORTH OF A METAL WITNESS POST AND SET IN THE TOP OF A CONCRETE POST PROJECTING 3 INCHES.
01/01/1966 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1966 (EBB) THE STATION MARK, REFERENCE MARK NO. 1, AND REFERENCE MARK NO. 2 WERE RECOVERED AS DESCRIBED AND FOUND IN GOOD CONDITION. THE TO REACH THE STATION WAS FOUND ADEQUATE. DUE TO THE WIDENING OF STATE HIGHWAY 50 (CICERO AVENUE) THE AZIMUTH MARK WAS DESTROYED. A NEW AZIMUTH MARK WAS NOT SET AT THIS TIME, SEVERAL INTERSECTION STATIONS WERE OBSERVED ON AND AFTER THE ROAD CONSTRUCTION IN THE AREA IS COMPLETED BENCH MARK W 207 RESET 1966 CAN BE CUT IN AND USED AS THE AZIMUTH MARK. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN- 1.5 MILES SOUTH-SOUTHEAST OF OAK FOREST
01/01/1966 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1966 RECOVERED IN GOOD CONDITION.
01/01/1967 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1967 (EBB) THE STATION MARK, REFERENCE MARKS WERE FOUND AS DESCRIBED AND IN GOOD CONDITION. BENCH MARK W 207 RESET 1966 WAS CUT IN OFF OF A WATER TANK TAKEN EARLIER BY ANOTHER UNIT. THE OTHER OBJECTS WERE BLOCKED BY HAZE AND COULD NOT BE TAKEN. THE PREVIOUS DESCRIPTION IS ADEQUATE WITH THE BELOW CHANGES. BENCH MARK W 207 RESET 1966 IS A STANDARD BENCH MARK DISK STAMPED W 207 RESET 1966 SET IN THE TOP OF A ROUND CONCRETE MONUMENT WHICH PROJECTS 3 INCHES. IT IS ABOUT 600 FEET NORTHWEST OF THE INTERSECTION OF STATE HIGHWAY 50 AND 171ST STREET, 49 FEET NORTH OF THE CENTERLINE OF 171ST STREET, 3 FEET EAST OF A POWER POLE AND 1-1/2 FEET WEST OF A METAL WITNESS POST. NOTE- THE DISTANCE AND DIRECTION TO THE REFERENCE MARKS CHECKED. REFERENCE MARKS 1 AND 2 WERE RESTAMPED 4 AND 5 RESPECTIVELY. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN- 1-1/2 MILES SOUTH-SOUTHEAST OF OAK PARK
01/01/1974 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 REFERENCES RM 1 - USCGS CONC MON AND DISK 28.55 RM 2 - USCGS CONC MON AND DISK 19.86 GR AZ ST JOHN CHURCH SPIRE SSE A2 MI 3445055 TO REACH FROM--THE INTERCHANGE OF HWY. I 57 AND HWY. I 80 WEST OF COUNTRY CLUB HILLS, GO NE ON HWY. I 57 APPROX. 1 MILE TO THE CICERO AVE. (HWY. 50) BRIDGE OVER I 57, THEN CONTINUE NE APPROX. 1/4 MILE ALONG THE EXIT RAMP TO E. BOUND 167TH ST. TYPE OF MARKER AND HOW SET-- STATION IS A USCGS CONCRETE MONUMENT AND DISK SET FLUSH IN A TREE LINE ON THE S. SIDE OF HWY. I 57, APPROX. 565 FEET S. OF THE CENTER OF THE HIGHWAY. NEAREST TOWN--COUNTRY CLUB HILLS.
01/01/1976 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1976 (ARS) TRYNER 2 RECOVERED IN GOOD CONDITION - DESCRIPTION IS OBSOLETE. BRENNAN HWY. HAS BEEN REPLACED BY INTERSTATE HWY. 57. RM 1 RECOVERED IN GOOD CONDITION - DESCRIPTION IS OBSOLETE. BRENNAN HWY. HAS BEEN REPLACED BY INTERSTATE HWY. 57. RM 2 RECOVERED IN GOOD CONDITION - DESCRIPTION IS OBSOLETE. BRENNAN HWY. HAS BEEN REPLACED BY INTERSTATE HWY. 57. AZIMUTH MARK NOT FOUND - PROBABLY DESTROYED BY ROAD CONSTRUCTION. DISTANCE AND DIRECTION FROM NEAREST TOWN--1-1/2 MI. SE OF OAK FOREST.
01/01/1977 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (JLO) THE STATION MARK, REFERENCE MARKS 4 AND 5 AND BM W 207 RESET WERE RECOVERED AS DESCRIBED IN 1967. BM W 207 CAN SERVE AS AN AZIMUTH MARK, HOWEVER, IT WILL REQUIRE SOME CLEARING TO TRYNER 2 TO BE USED. THE ANGLE BETWEEN THE REFERENCE MARKS CHECKED FAVORABLE, HOWEVER, THE DIRECTION FROM THE SPHERICAL SHAPED WATER TANK TO REFERENCE MARK 4 WAS LESSER BY 4 MINUTES 44.9 SECONDS, ALSO REFERENCE MARK 5 WAS GREATER BY 5 MINUTES 32.17 SECONDS AND BM W 207 RESET WAS GREATER BY 6.5 SECONDS. THE DISTANCE TO REFERENCE MARK 4 WAS GREATER BY 0.004 METERS AND REFERENCE MARK 5 WAS LESSER BY 0.005 METERS. BM W 207 RESET CAN SERVE AS AN AZIMUTH MARK, BUT IT REQUIRE ABOUT 1/2 MAN DAYS OF CLEARING. FOLLOWING IS A NEW AND COMPLETE DESCRIPTION. THE STATION IS LOCATED ON PROPERTY OWNED BY MILLER BUILDER INCORPERATED. TO REACH THE STATION FROM THE CENTER OF THE OVERPASS ON 167TH STREET EXIT OF INTERSTATE 57 ABOUT 1 MILE WEST OF MARKHAM GO WEST ON 167TH STREET FOR 0.45 MILE TO THE JUNCTION OF STATE ROUTE 50, TURN LEFT AND GO SOUTH ON STATE ROUTE 50 FOR 0.6 MILE TO THE SOUTH END OF OVERPASS OVER INTERSTATE 57. TURN LEFT AND GO NORTHERLY ON A SHORT PAVED STRIP OF ROAD FOR 0.05 MILE. HERE TURN RIGHT AND GO EAST ALONG THE SOUTH EDGE OF A CULTIVATED FIELD FOR 0.1 MILE TO A SMALL NORTH-SOUTH TREE LINE. TURN LEFT AND GO NORTH ALONG WEST SIDE OF TREE LINE FOR 0.15 MILE TO HIGHEST GROUND AND THE STATION ON THE RIGHT IN THE TREE LINE. TO REACH BM W 207 RESET FOR THE SHORT PAVED STRIP OF ROAD AT THE SOUTH END OF OVERPASS OVER INTERSTATE 57 CONTINUE SOUTH ON STATE ROUTE 50 FOR 0.1 MILE 171ST STREET ON THE RIGHT, TURN RIGHT AND GO WEST FOR 0.1 MILE TO THE BM W 207 RESET AS DESCRIBED THE STATION MARKS ARE, STANDARD DISK STAMPED---TRYNER 2 1959---. IT IS 29.8 FEET EAST OF A METAL WITNESS POST, 14 FEET SOUTH OF THE SOUTH EDGE OF A CULTIVATED FIELD, 14 FEET NORTH OF THE NORTH EDGE OF A CULTIVATED FIELD, AND 4.4 FEET WEST OF A METAL WITNESS POST. ACCORDING TO THE OLD DESCRIPTION THE UNDERGROUND DISK IS SET IN AN AN IRREGULAR MASS OF CONCRETE. REFERENCE MARK 4, A STANDARD DISK STAMPED---TRYNER 2 NO 4 1959---, IS SET IN TOP OF A 12-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS 6 INCHES ABOVE THE GROUND SURFACE. IT IS 33 FEET WEST OF A METAL WITNESS POST, 14 FEET SOUTH OF THE SOUTH EDGE OF A CULTIVATED FIELD, 14 FEET NORTH OF THE NORTH EDGE OF A CULTIVATED FIELD AND 1.1 FEET EAST OF A METAL WITNESS POST. REFERENCE MARK 5, A STANDARD DISK STAMPED---TRYNER 2 NO 5 1959---, IS SET IN TOP OF A 12-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS 6 INCHES ABOVE GROUND SURFACE. IT IS 15 FEET EAST OF A METAL WITNESS POST, 14 FEET SOUTH OF THE SOUTH EDGE OF A CULTIVATED FIELD AND 14 FEET NORTH OF THE NORTH EDGE OF A CULTIVATED FIELD. BM W 207 RESET, A STANDARD BENCH MARK DISK STAMPED---W 207 RESET 1966---, IS SET IN THE TOP OF A 12-INCH CYCLINDRICAL CONCRETE MONUMENT WHICH IS FLUSH WITH THE GROUND SURFACE. IT IS 48.5 FEET NORTH OF THE CENTER OF 171ST STREET, 19 FEET SOUTH-SOUTHEAST OF A 20-INCH MAPLE TREE, 3.5 FEET EAST OF A UTILITY POLE, AND 2.5 FEET WEST OF A METAL WITNESS POST. NO MEASUREMENT WAS MADE BETWEEN REFERENCE MARKS, DUE TO THE ANGLE BEING NEAR 180 DEGREES. THE HEIGHT OF LIGHT ABOVE THE STATION WAS 25.9 METERS.
01/01/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 (ARB) RECOVERED AS DESCRIBED. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--STATION IS ABOUT 2 MILES SW OF MARKHAM.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in October 1999.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.
  • 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.

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