498X (CTDT, Danbury, CT) - U.S. Benchmarks on Waymarking.com

This station is a standard CTGS disk, located in Danbury, CT. It is positioned west from the intersection of Mill Plain Road (U.S. Route 6) and Kenosia Avenue. Set in the easternmost end of a grass plot between a sidewalk and roadside curb, the mark is set in a concrete post and 2-3 inches below the ground surface.

Station #498X is an apparent reset (replacing station #498, see below), and is located east (about 10-ft) from power pole 77, rather than south from it, where the original was. It's position is clearly noted at the road curb ('498X' is painted on the asphalt). Having been exposed by recent surveyor activity, finding this mark has been easy.

The description below is an extract from NGS datasheet LX7359, for station #497. Note that the description calls out station #498 (A U.S. Coast & Geodetic Survey & State Survey disk), which was used as an azimuth mark for #497, and was apparently destroyed by road construction. This is the only information available for this station, which made this find possible (At this time, there is no easy access to CT datasheets on the Net, except through NGS datasheets, where applicable).

NGS extract:

MARK IS A STANDARD USC+GS DISK STAMPED---498---, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT 15 CM ON A SIDE RECESSED 30 CM BELOW THE GROUND. IT IS LOCATED 26.00 METERS (85.3 FT) SOUTHEAST FROM POWER POLE 78, 5.94 METERS (19.5 FT) NORTHEAST FROM THE CENTERLINE OF U.S. ROUTE 6 AND 202, 23.26 METERS (76.3 FT) WEST FROM A GRANITE AND MORTAR PILLAR AND 1.52 METERS (5.0 FT) SOUTH FROM POWER POLE 77.
TO REACH AZIMUTH MARK #498 FROM STATION #497 PROCEED NORTHWESTERLY
ALONG U.S. ROUTE 6 AND 202 FOR 0.6 KM (0.38 MI) TO THE STATION ON
THE RIGHT.

Note that I paraphrased the last sentence of the extract for clarification purposes.

Park vehicle in nearby parking lot behind the station. The mark may be visible, as there are frequent visits by surveyors here. This mark is not currently published with the NGS.

Condition: Mark found in good condition Designation: 498X Benchmark Agency: other (not included below) Benchmark Agency (if other): CT Geodetic Survey Monumentation type: Disk (unspecified type) County: Fairfield USGS 7.5' Topographic Quadrangle Name (optional): Danbury 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] Monumentation type (if other): Not listed Special category (optional): Not listed Special Category (if other): Not listed NGS PID: Not listed Local database's URL (optional): Not listed

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