Featured Marks
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...LY1116 is a 1932 USGS mark located in Tobyhanna, PA. It's adjacent to an abandoned railroad control tower directly across Route 423 from the Tobyhanna railroad station. |
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...LY0800 is a New Jersey Geodetic Survey mark first described by NGS in 1942. We were nearly attacked by a redneck wacko while searching for and trying to photograph this rivet! |
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...LY1238 is a 1919 USGS mark first described by NGS in 1934. This disk has a hole through its center, and the stamping was done with a set of number stamps only (mostly the number "1"). There's also a misspelling. |
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...LY1150 has moved from Pike County, PA to my computer desk. When we found it, the mark itself was in good condition, though it had obviously been displaced from its proper location. We were instructed by NGS to remove the disk. |
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...Set in the seawall at the southern tip of Ocean City, Maryland, LINDENSTRUTH is nearly worn smooth. |
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...Finally, one more USGS disk. These are tricky to find when you only have USGS datasheets to use. In this case, the mark was shown on my topo map and the coordinates I took from the map were very good. |
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...According to the descriptive text and the geodetic control diagram, this mark is stamped ET 6 WAC. Imagine our surprise when we arrived and found it stamped ET 5 WAC. |
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...Finding NA0423 was a great start to a day of adventures near Kaaterskill Falls. I had a small confrontation here. |
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...Benchmark disks are likely to snap in half if one tries to pry them out of their setting. NA0878 in Cooperstown, NY is a good example. |
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...Set in the foundation of an old railroad water tank along the Pennsylvania Railroad in Troy, PA, LZ0500 is one of my oldest finds. The disk is from 1899. |
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...This mark is set in a pedestrian bridge connecting Portland, PA and Columbia, NJ. The last covered bridge spanning the Delaware, the original 1869 walkway survived until 1955, when it was destroyed by flooding from Hurricane Diane. It was rebuilt on the old piers as an open walkway. |
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...This tower is one of eleven observation towers built along the Delaware coast during World War II. Triangulation was used to determine the positions of enemy vessels. |
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...This PennDOT mark in the Moosic Mountains above Dunmore, PA is the first of its kind I've encountered. It's a railroad spike set in the base of an oak tree. This type of mark seems primitive, but it's actually less than ten years old. |
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...While on a day trip to New York City, Aaron and I found this disk, one of many, embedded in the sidewalk near the World Trade Center site. These marks have been used in the efforts to reconstruct the PATH station. |
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...Why did the National Ocean Service set this disk, HAVENS, in a mountain ridge in upstate New York? Even the most knowledgeable people at NGS aren't sure. |
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...HOLE, supposedly a C&GS topographic station disk, is a mystery. Neither NGS nor USGS have any data for it. The mark is set into a rock formation above Thunder Hole in Acadia National Park, Maine. |
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...Can a survey mark ever be a disappointment? Possibly, when you're expecting 1889 to be the date of monumentation, only to arrive at the site and realize it's simply the elevation. |
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...As I prepare for my second annual trip to Maine, I thought it would be appropriate to feature PE0279. It was my "earliest" find, documented at 5:30 am after viewing a pretty sunrise from atop nearby Cadillac Mountain. View my Geocaching.com log ...Read the official NGS datasheet ... |