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Details for Benchmark: LC0763

N 40° 51.050 W 088° 39.333 (NAD 83)

Altitude: 659.08

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

Location:
In LIVINGSTON county, IL View Original Datasheet
Designation:
S 248
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

Must Read!

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Found this benchmark while grabbing a cache at this uniquely shaped old building. Noticed the chains attached to the bench while looking thru the window of the front door. Incredible image from the past.

[Photos:]
photo

Found with Rikjaxon while attending Red Carpet Days.

[Photos:]
photoClose
photoLooking south

Cruising, or caching, down the Route 66, headed towards St Louis... It makes sense that so many of the benchmarks along the old road here are still in place, as they haven't been progressed out of existence.

Quick find prior to finding the geocache nearby and cruising Route 66. Just look out for those police cruisers too.

[Photos:]
photoimage

Found this one while doing the nearby geocache.

Found while heading home from GWXII

cool first ever benchmark

Found this one today while out on Route 66 finding the District 6 cache!

[Photos:]
photoBenchmark at District 6
Benchmark with sunglasses in the picture

Found this one while out caching for District 6 cache.

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photo04212011_001

Found the nearby cache and grabbed this too. Cool benchmark, cool location RT66

Found this benchmark while caching down Route 66.

Found in good condition.

[Photos:]
photoSetting
photoLC0763

It's still here by the old Illinois State Police HQ.

[Photos:]
photoLC0763

Found this while checking out the old building. I had done the nearby geocache about a year ago and missed this then, but I found it today while checking out the flagpole. Wonderful history here! TFTC!

[Photos:]
photoNear Pontiac, Il

Benchmark #4. Found it while doing a nearby cache.

Found this one after doing Old District 6. Interesting building.

found it

lemon16 located this one quickly, after finding the "Old District 6" cache.

Nice quick find after finding the nearby cache

Found as and where described.

[Photos:]
photoLC0763
At former Lincoln, IL, state police HQ.
photoLC0763
Old, closed, Pontiac, IL, state police HQ

Super easy. 5:35pm

[Photos:]
photoLC0763

found

[Photos:]
photolc0763.jpg

found it in the condition & location described.

found it as described

Found in good condition. The State Police headquarters has just moved but all is still there.

[Photos:]
photoLCO0763 bench mark S248 designation

Documented History (by the NGS)

01/01/1961 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1961 1.8 MI SW FROM PONTIAC. ABOUT 1.75 MILES SOUTHWEST ALONG U.S. HIGHWAY 66 FROM ITS JUNCTION WITH STATE HIGHWAY 116 IN THE SOUTHWEST PART OF PONTIAC, SET IN THE TOP OF THE NORTHEAST CORNER OF A CONCRETE BASE OF A FLOOD LIGHT AT THE STATE POLICE HEADQUARTERS BUILDING, 8.5 FEET EAST-NORTHEAST OF THE FLAG POLE, 19 FEET NORTHWEST OF THE CENTER LINE OF THE DRIVE, 25 FEET SOUTHWEST OF THE SOUTHWEST EDGE OF THE SIDEWALK, 1.5 FEET NORTHWEST OF THE NORTHWEST EDGE OF THE SIDEWALK, 47 FEET SOUTH-SOUTHEAST OF THE CENTER OF THE ENTRANCE TO THE BUILDING, 0.5 FEET ABOVE THE LEVEL OF THE DRIVE.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • 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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