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Details for Benchmark: DN0684

N 33° 13.833 W 097° 10.733 (NAD 83)

Altitude: 690.6

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

Location:
In DENTON county, TX View Original Datasheet
Designation:
M 949 RESET 1971
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Kidwrangler and I looked for this one without success today. There is a lot of construction and some new concrete in this vicinity, plus a lot of soft mud. We fear it may be gone but couldn't say that definitively without a more thorough search in dryer weather.

Found this one as described.

[Photos:]
photoBenchmark M 949 RESET 1971 (DN0684)

I parked off the road into a very little used driveway at N33 13.819 W97 10.791 and walked East a little bit to the culvert and easily found the mark.

[Photos:]
photoDN0684 Disc
photoDN0684
BM, My foot, culvert and cattails
photoDN0684
BM post, culvert
photoDN0684
My car parked at the coords. I gave for parking, the post and BM culvert. Facing West. Showing the BM, culvert

We found the right culvert, but there was so much well-established grass growing on the N headwall, that we did not find the disk. We know it is there, just could not chop through the turf with the tools we had with us. We'll bring a hoe next time!

Right where they said it was!

[Photos:]
photoDNO684

Documented History (by the NGS)

01/01/1971 by TXHD (MONUMENTED)
01/01/1973 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1973 IN DENTON. 3.7 MILES NORTHWEST OF DENTON, DENTON COUNTY. THIS BENCH MARK MAY BE REACHED FROM THE POST OFFICE BY GOING 0.1 MILE WEST ALONG MCKINNEY STREET, THENCE 1.0 MILE NORTH ALONG U.S. HIGHWAY 77, AND THENCE 2.6 MILE WEST ALONG STATE HIGHWAY 380. IT IS AT A 1-7 X 3 X 87 FT. CONCRETE CULVERT, IN THE TOP OF THE CENTER NORTH HEADWALL, 43 FT. NORTH OF THE CENTERLINE OF THE HIGHWAY, AND 5 FEET LOWER THAN THE HIGHWAY. A STANDARD DISK, STAMPED M 949 RESET 1971.
01/01/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 RECOVERED IN GOOD CONDITION.
02/14/1998 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1998 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The geoid height was determined by GEOID99.

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