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Elevation at BLM monument
Is there a way to find the elevation of the BLM monument in the attached photo? Or does BLM not track or provide that info? It does not appear to be at a section boundary.
Thanks!
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4 Replies
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That looks like a mineral survey corner.
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No, BLM doesn’t care about elevations, unless they are surveying a boundary that is dependent on elevation.
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That looks like a mineral survey corner.
I was thinking the same thing Dave.
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Yeah, it looks like a witness corner to a mill site. Survey number is 4?76B, with the ? being either a “3”, “8” or “9” (my guess is “3”).
If you are looking for a reliable elevation, you most likely need to look elsewhere. It may be that in 2017 the BLM conducted the survey with GPS and there is a geodetic position for this shiny new brass cap.
In Colorado, the BLM will sometimes prepare a GPS Corner RecoveryLocation Card for a found corner. The examples I’ve seen have lat/long/height. On one card the height was reported to the nearest 0.1 ft., but I have no idea if that is an ellipsoid height or an elevation. The card states it was an RTK observation and this is below the lat/long/height values, “NAD83 (2011)”, which indicates the horizontal datum was NAD83 (NSRS2011).
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