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Details for Benchmark: KY3089

N 40° 21.216 W 080° 00.990 (NAD 83)

Altitude: 1295

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

Location:
In ALLEGHENY county, PA View Original Datasheet
Designation:
SHANNON
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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The Cool Springs Sports Complex has been built at the station site. Consider the station mark and all reference marks as lost. The azimuth mark was recovered in good condition at N 40 21.441 W 080 00.951. The monument projects 3 inches above the surface of the ground.

[Photos:]
photoKY3089 - AZ MK
photoKY3089 - AZ MK eye level
photoKY3089 - AZ MK looking N

Survey disc is gone.

[Photos:]
photoclose up
photoGEDC0009
photoGEDC0010
photoGEDC0011
photoGEDC0012

Looked for this one yesterday. It seems that the coordinates place the benchmark in the middle of a giant pile of garbage. Took readings from multiple angles, and GZ is located under a tall pile of junk.

Fellow Geocachers,
Please familiarize yourself with the accuracy of hand-held, recreation grade GPS Units before you search for bench marks. Especially if you decide to report your GPS POSITIONAL information about the bench mark to the NGS. Reporting the CONDITION of a station that you’ve found to NGS is very helpful, especially to surveyors and geodesists who may need to use the station. But to opine on the accuracy of the published values of the station is folly, unless you have a $20,000 GPS survey-grade GPS unit with centimeter accuracy and know how to use it. This “bench mark” (actually a first order triangulation station”) was bagged by a Geocacher who decided to submit a report to NGS about the positional differences the Geocacher discovered vs. the published values. Needless to say, this Geocacher was so wrong about what he was reporting that it has created a howl of laughter across the international surveying community.

The geocacher’s report submitted to NGS is as follows:

KY3089'RECOVERY NOTE BY INDIVIDUAL CONTRIBUTORS 2008 (DH)
NGS REPORTED COORDINATES N 40 DEG 21.216 W 080 DEG 00.990 (NAD 83) ARE INCORRECT.
[comment 1 – there is a lot of literature on the actual accuracy of hand-held GPS units. Do some research on this before making such a cavalier statement to an agency that helped invent GPS. We are riding tricycles. They are launching satellites. NGS is not beyond reproach, but get your ducks in a row before you hang it out there like this. Run some 4 hour static sessions with an L1/L2 receiver and submit it to OPUS before you report that the published values may be incorrect. And if you don’t know what that means, just smile and wave boys and go about having fun with geocaching.]

THE ACTUAL COORDINATES ARE N 40 DEG 21.219 W 080 DEG 00.994 (NAD 83) SEE TINYURL.COM/6KNOTQ FOR PHOTO SHOWING THE INACCURACY.
[ see comment 1 above]

THE BENCHMARK POSITION HAS CHANGED.
[ see comment 1 above]

IN THE DOCUMENTED HISTORY 25-JAN-1989, 'HIT BY MACHINERY AND PART OF THE DISC HAS BEEN SHEARED OFF. THE MARK MAY BE SLIGHTLY OUT OF POSITION'
[Comment 2 – The data sheet actually reports the above damage to “RM 2”. RM means “reference mark” which is a separate brass disk that is used as a reference to help find or reset the true “bench”. When this bench was set, they set a couple of other markers, or RMs, near it and measured the bearings and distances from the benchmark to the RMs to be able to recover or reset the bench. Learning how to read these station reports can help your geocaching skills when on the hunt.]
PLEASE EITHER UPDATE THE COORDINATES OR MOVE THE BENCHMARK BACK TO THE CORRECT LOCATION
[comment 3- this is just childish. You don’t know what you are saying and what you are saying is just foolish to all the adults in the room]

Have fun searching for benchmarks. It’s an exciting exercise in sleuthing. And if you find one that you truly think has been disturbed, contact a local land surveying company. They can help you find a local governmental agency that administrates these marks in your area.

Happy trails,
Rope Stretcher
Geocacher and Land Surveyor

I never knew there was a dump up there. Is it legal? Probably not. Serious need of cleaning up, broken glass everywhere. Depressing. Found the benchmark. Hated the area. Yuck.

[Photos:]
photobenchmark
photo100_1919

Found benchmark in middle of dump behind Cool Springs. Access via Abe Lincoln school then up hill to the left. This BM has moved several feet from its original location.

[Photos:]
photocloseup shot
photobackground shot
facing approx. 78 degrees (ENE)
photo100_6250
photo100_6252
photo100_6253
photo100_6254

Site is now protected by 3 posts. Marker has been "noticeably painted".
Area appears to have become somewhat of a local dumping site. I would recommend sturdy footwear due to debris and broken glass.

Elevation and Lat/Long measured well w/my GPS unit today.

[Photos:]
photoKY3089 1.jpg
photoKY3089 2.jpg
photoKY3089 3 POSTS AND PURPLE CEMENT.jpg

Documented History (by the NGS)

01/01/1927 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1927 (WM) STATION IS ABOUT 6 MILES S OF PITTSBURGH AND 1 MILE S OF CASTLE SHANNON. MARKS ARE STANDARD DISKS SET IN CONCRETE. STATION IS REACHED FROM CASTLE SHANNON BY ROAD LEADING S FROM MAIN HIGHWAY, NEAR N EDGE OF VILLAGE, PAST CONVENT AND CEMETERY. AFTER PASSING THE SMALL CEMETERY ON LEFT AND DESCENDING HILL, THE ROAD BEARS TO LEFT. STATION IS ABOUT 200 YARDS S OF THIS POINT AND 50 METERS W OF A LARGE DEAD CHESTNUT TREE. STATION IS ON HIGHEST POINT OF THE HILL, ABOUT 1/2 MILE SE OF THE U.S. GEODETIC SURVEY STATION, AND 1/2 MILE S OF A FARMHOUSE AND ORCHARD. HEIGHT OF SIGNAL ABOVE STATION MARK - 1.11 METERS.
01/01/1927 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1927 RECOVERED IN GOOD CONDITION.
01/01/1934 by PAGS (GOOD)
RECOVERY NOTE BY PENNSYLVANIA GEODETIC SURVEY 1934 THE BEARING TO STATION UNION IS N 48 DEG 38 MIN 08.5 SEC W. THIS STATION WAS FOUND AFTER SOME DIFFICULTY IN LOCATING THE ROAD LEADING S FROM MAIN HIGHWAY, NEAR N EDGE OF VILLAGE, BECAUSE THE LOCATION IS NOT THE N EDGE OF THE VILLAGE. THE ROAD MIGHT BETTER BE DESCRIBED AS HAMILTON ROAD AND IT LEAVES LIBRARY ROAD (THE MAIN HIGHWAY MENTIONED) AT A POINT OPPOSITE HAMILTON SCHOOL. THE STATION IS E NOT W OF A LARGE DEAD CHESTNUT TREE AND THE FOLLOWING DISCREPANCY IS NOTED- RECOPIED FROM STATION DESCRIPTION. I REPRODUCED ENOUGH OF THE TRIANGULATION NET IN THIS SECTION, ROUGHLY, TO SATISFY MYSELF THAT THE TRUE AZIMUTH SHANNON TO UNION WAS ALL RIGHT AND SINCE THE ANGLES BETWEEN THE REFERENCE MARKS CHECKED, APPARENTLY SOMETHING ELSE WAS IN ERROR. I HAVE MADE SUN OBSERVATIONS ON THIS STATION TO DETERMINE THE AZIMUTH TO REFERENCE MARK NO. 1 AND SINCE THE TWO AZIMUTHS, DIFFER BY 180 DEG IT INDICATES THAT THE VERNIERS MAY HAVE BEEN READ INCORRECTLY, OR IN REVERSED ORDER. THIS ADDITIONAL INFORMATION MAY BE ADDED- THE CONVENT MENTIONED IS ST. FRANCIS AND THE CEMETERY IS ST. CASIMIR. THE PROPERTY IS OWNED BY JOHN BANDI OF LIBRARY ROAD, HILLCREST, PENNSYLVANIA. ALSO TRUE AZIMUTH SHANNON TO UNION IS N 48 DEG 38 MIN 08.5 SEC W.
01/01/1956 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (HJB) STATION AND RMS RECOVERED IN GOOD CONDITION. FOR PRESENT DAY RECOVERY THE DESCRIPTION SHOULD READ AS FOLLOWS- LOCATED ABOUT 6 MILES SOUTH OF PITTSBURGH, ONE MILE SOUTH OF CASTLE SHANNON, 0.5 MILE SSE OF THE LARGE SILVER WATER TANK, AND 0.3 MILE NW OF THE HAMILTON PRESBYTERIAN CHURCH. IT IS ON TOP OF A GRASSY HILL, AT THE INTERSECTION OF TWO TRACK ROADS. MARKED BY A STANDARD DISK, STAMPED SHANNON 1927, SET IN THE TOP OF A 12 INCH SQUARE CONCRETE MONUMENT PROJECTING 2 INCHES ABOVE GROUND. R.M. 1 IS LOCATED 170.43 FEET NORTHWEST OF THE STATION, AND 60 FEET SOUTHWEST OF THE CENTERLINE OF THE NW-SE TRACK ROAD. MARKED BY A STANDARD DISK, STAMPED SHANNON RM 1, SET IN THE TOP OF A 12 INCH SQUARE CONCRETE MONUMENT PROJECTING 2 INCHES ABOVE GROUND. R.M. 2 IS LOCATED 66.36 FEET NORTHEAST OF THE STATION, AND 33 FEET NORTHWEST OF THE CENTERLINE OF THE NE-SW TRACK ROAD. MARKED BY A STANDARD DISK, STAMPED SHANNON RM 2, SET IN THE TOP OF A 12 INCH SQUARE CONCRETE MONUMENT PROJECTING 2 INCHES ABOVE GROUND. TO REACH FROM THE JUNCTION OF LIBRARY AND HAMILTON ROADS IN CASTLE SHANNON, GO SOUTHERLY ON HAMILTON ROAD FOR 1.0 MILE. THE MAIN ROAD BENDS LEFT HERE AND A TRACK ROAD BEARS RIGHT (SOUTH). TURN RIGHT ON TRACK ROAD AND GO SOUTH AND WEST UP HILL FOR 0.2 MILE TO SUMMIT AND STATION.
01/01/1958 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (WER) NOTE--RM 1 DISTANCE IS A 1927 MEASUREMENT. STATION MARK, REFERENCE MARK NO. 1, AND REFERENCE MARK NO. 2 WERE RECOVERED AND FOUND TO BE IN GOOD CONDITION. AN AZIMUTH MARK AND REFERENCE MARK NO. 3 WERE ESTABLISHED BY THIS PARTY. THE DISTANCE AND DIRECTION TO REFERENCE MARK NO. 2 WERE VERIFIED. THE DIRECTION TO REFERENCE MARK NO. 1 WAS VERIFIED BUT THE DISTANCE COULD NOT BE CHECKED BECAUSE THE LEG OF THE TOWER WAS SET DIRECTLY IN LINE. DUE TO THE CHANGE IN THE LOCALITY AND ERRORS IN THE 1927 DESCRIPTION, A NEW DESCRIPTION FOLLOWS- THE STATION IS LOCATED ON THE SUMMIT OF A BARE HILL ABOUT 1.0 MILE SOUTH OF CASTLE SHANNON, 4 MILES EAST OF BRIDGEVILLE, 6 MILES S OF THE INTERSECTION OF THE MONONGAHELA AND ALLEGHENY RIVERS AND 0.5 MILE NORTHWEST OF THE HAMILTON, FIRST PRESBYTERIAN CHURCH. THE PROPERTY IS OWNED BY THE GUNTMAN ESTATE. TO REACH THE STATION FROM THE SOUTH END OF THE LIBERTY TUBES AND STATE HIGHWAYS 88 AND 51, SOUTHWEST SIDE OF PITTSBURGH, GO SOUTHEASTERLY ON STATE HIGHWAYS 88 AND 51 FOR 2.45 MILE WHERE HIGHWAYS SEPARATE AND SIGN CASTLE SHANNON 1 MILE, TURN RIGHT AND FOLLOW STATE HIGHWAY 88 (LIBERTY ROAD) FOR 1.6 MILE TO HAMILTON ROAD ON THE LEFT, TURN LEFT UPHILL ON HAMILTON ROAD FOR 0.65 MILE TO THE TOP OF HILL AND THE AZIMUTH MARK ON THE LEFT, CONTINUE STRAIGHT AHEAD ON HAMILTON ROAD FOR 0.15 MILE TO THE SOUTHEAST END OF CURVE IN THE ROAD AND A DIM TRACK ROAD ON THE RIGHT, TURN RIGHT AND FOLLOW DIM TRACK ROAD WESTERLY FOR 0.2 MILE TO THE TOP OF HILL AND THE STATION IN THE CENTER OF THE INTERSECTION OF SEVERAL DIM TRACK ROADS. STATION MARKS ARE STANDARD DISKS STAMPED SHANNON 1927. THE SURFACE DISK IS SET IN A SQUARE CONCRETE POST WHICH PROJECTS 1 INCH. IT IS IN THE SOUTHWEST CORNER OF A TRIANGLE FORMED BY THE DIM TRACK ROADS. REFERENCE MARK NO. 1, A STANDARD DISK STAMPED SHANNON R.M. 1 1927, IS SET IN A SQUARE CONCRETE POST WHICH PROJECTS 3 INCHES. IT IS ON THE NORTHWEST SLOPE OF THE HILL ABOUT 42 FEET SOUTH OF THE CENTER OF TRACK ROAD AND 56.5 FEET WEST OF REFERENCE MARK NO. 3. REFERENCE MARK NO. 2, A STANDARD DISK STAMPED SHANNON R.M. 2 1927, IS SET IN A SQUARE CONCRETE POST WHICH PROJECTS 1 INCH. IT IS IN THE TRIANGLE FORMED BY THE DIM TRACK ROADS. REFERENCE MARK NO. 3, A STANDARD DISK STAMPED SHANNON NO 3 1927, IS SET IN A SQUARE CONCRETE POST WHICH PROJECTS 3 INCHES. IT IS 23 FEET SOUTH OF A FIVE TRUNK TREE AND 10 FEET WEST OF THE CENTER OF A DIM TRACK ROAD. AZIMUTH MARK, A STANDARD DISK STAMPED SHANNON 1927, IS SET IN A SQUARE CONCRETE POST WHICH PROJECTS 5 INCHES. IT IS 52.5 FEET NORTH-NORTHWEST OF THE CENTER OF THE METAL GATE LEADING TO THE CEMETERY, 35.5 FEET EAST OF THE CENTER OF HAMILTON ROAD, 2 FEET WEST OF CYCLONE FENCE AROUND CEMETERY AND ABOUT 100 FEET SOUTHEAST OF ANDREA DRIVE. A STANDARD WITNESS POST WAS SET 2 FEET SOUTHEAST OF THE MARK.
01/01/1959 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 (JCC) STATION WAS RECOVERED AND ALL MARKS WERE FOUND IN GOOD CONDITION. A LONGER MEASUREMENT OF 0.030 METERS WAS NOTED IN THE DISTANCE TO REFERENCE MARK NUMBER 1. THE PROPERTY ON WHICH THE STATION IS ESTABLISHED IS OWNED BY THE PITTSBURGH TERMINAL CORPORATION OF 3311 LIBRARY ROAD, CASTLE SHANNON, PITTSBURGH 34, PENNSYLVANIA.
01/01/1984 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1984 (DTM) SHANNON 1927 - STATION RECOVERED IN GOOD CONDITION WITNESS POSTS SET ALONGSIDE. RM NO. 1 - RECOVERED IN GOOD CONDITION. RM NO. 2 - RECOVERED - POINT HAS BEEN HIT BY HILIFT AND CONCRETE AND ONE HALF OF DISC HAS BEEN SHEARED OFF - POSITION APPEARS UNCHANGED.
01/25/1989 by HARTMN (GOOD)
RECOVERY NOTE BY HARTMANN ASSOCIATES INCORPORATED 1989 THE STATION, RM NO. 1, RM NO. 2 AND THE AZIMUTH MARK WERE RECOVERED AS DESCRIBED. RM NO. 2 HAS BEEN HIT BY MACHINERY AND PART OF THE DISC HAS BEEN SHEARED OFF. THE MARK MAY BE SLIGHTLY OUT OF POSITION. NO SEARCH WAS MADE FOR RM NO. 3. A CARSONITE POST WAS SET AT THE AZIMUTH MARK, AND THE STATION IS PROTECTED BY FOUR WOODEN POSTS. THE SITE IS NOW USED AS A GOLF DRIVING RANGE AND BASEBALL BATTING CAGES AND IS LEASED TO COOL SPRINGS INC. LESSEE - S. DUCKWORTH (412) 881-9877 LESSOR - MONROE GUTTMAN (412)-882-8500

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in April 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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