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Details for Benchmark: LZ1847

N 41° 35.475 W 076° 00.323 (NAD 83)

Altitude: 1486

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

Location:
In WYOMING county, PA View Original Datasheet
Designation:
LASCO
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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N 41° 35.476 W 076° 00.322

Stations LASCO and DIETRICH (LZ1848) looked to be two of the most interesting on our “tour” of Tunkhannock area tri-stations. We were curious about the fact that there were two triangulation stations, both apparently still viable, placed within a few hundred feet of each other.

One further curiosity was the mention in the description of the subsurface mark being stamped FLOREY while the surface marks are stamped LASCO. We later learned the reason from Mr. Steve Lasco himself (see [b][URL=http://www.geocaching.com/mark/details.asp?PID=lz1848]LZ1848[/URL][/b]) . The plan had been to name the station after the feature on which it's located—Florey Knob—and the first disk had been stamped so already, according to Mr. Lasco. However, at his request the remaining disks were stamped LASCO.

Arriving at the site of this mark, the more southerly of the two, we found an open field bordered on one side by brush and on the other by the road we'd come in on. The reference marks are located within the brushy area but were not difficult to find. Our attention was drawn to reference mark 1 by two thin metal stakes adjacent to the monument, possibly set to indicate its position. Grass had grown over and partially obscured the station mark, but it is now well exposed.

A search later in the afternoon for the azimuth mark was unsuccessful. A resident informed us of the recent roadwork that had widened the highway and altered the area along the fenceline. Several weeks later, Mr. and Mrs. Lasco drove to the bottom of the hill to search for the disk. They reported that unfortunately, the boulder and mark—which had been quite conspicuous, they said—are no longer visible.

[i]A report on the condition of these marks has been submitted to NGS, along with the following recovery note:[/i]

The station mark and reference marks 1 and 2 were recovered in good condition. Powerline pole 919 is also numbered SBFC 7. The azimuth mark was searched for but was not located. U.S. Route 6 has been widened to 5 lanes in the area of the culvert, and a local resident indicated that the field near the wire fence was recently excavated for a new sewer line running parallel to the highway. The 7 by 10 foot boulder and the witness post could not be found.

Zhanna

[I]Edit: corrected link after a change to the site.[/I]

[This entry was edited by Zhanna on Wednesday, October 27, 2004 at 7:33:47 PM.]

[Photos:]
photoLZ1847, Wyoming County, PA
photoEye-level view of the monument and mark.
photoLooking SW toward RM1 and powerline pole 919.
photoLooking NNW toward RM2; Rich stands at the reference mark.

photoLZ1847 RM1
photoEye-level view of the mark.
photoLooking SW toward the powerline pole.
photoLooking NNE toward toward the station; Rich kneels at the station mark.

photoLZ1847 RM2
photoEye-level view of the mark.
photoLooking SSW toward the powerline pole.

N 41° 35.474 W 076° 00.323

[B]Recovered in good condition.[/B]

This second order triangulation station is situated on the southerly end of the ridgeline of Florey Knob, in a grassy farm field roughly 4.8 airline miles northwest of Tunkhannock. The 1968 “to reach” directions are still applicable. A handheld GPS receiver made locating the station a relatively easy task.

The historical description leads reliably to the station and the two reference marks. The station is roughly in the center of a mowed field on the left (north) side of the farm lane, and the two reference marks are located along the brushy western edge. RM1 is 15 inches south of 2 thin metal rods. Powerpole number 919 is also numbered SBFC 7.

The azimuth mark was searched for but not found. The highway (Rt. 6) has been widened in the area of the concrete culvert to 5 lanes. In addition, a local resident indicated that the pasture near the wire fence was recently excavated for a sewer line which runs parallel to the highway. The metal witness post and the 7 by 10 foot by 18 inch boulder could not be located as described.

At the station a Garmin GPSmap76 receiver with active remote antenna was used to record WAAS-corrected coordinates which were 6.1 feet from the adjusted coordinates listed on the NGS datasheet. All three marks are well exposed, in good condition, and the stamped designations are legible. ~Rich in NEPA~

[last edit: 11/1/2003 3:45:00 PM PST]

[Photos:]
photoLZ1847, “LASCO 1968,” Wyoming County, PA.
photoGPSr and the station mark.
photoEyelevel view of station mark and setting.
photoOrientation view, facing southwest, RM1 and powerpole.
photoOrientation view, facing north-northwest, Zhanna at RM2.

photoLZ1847, “LASCO NO. 1 1968”
photoGPSr and the reference mark.
photoEyelevel view of reference mark and setting.
photoA pair of metal rods indicate the mark.
photoOrientation view, facing southwest and powerpole.
photoOrientation view, facing NNE, Zhanna at station.

photoLZ1847, “LASCO NO. 2 1968”
photoGPSr and the reference mark.
photoEyelevel view of reference mark and setting.
photoOrientation view to south-southwest and powerpole.

photoPowerpole ID tags.
photoAdditional powerpole ID numbers.

Documented History (by the NGS)

1/1/1968 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1968 (WMJ) THE STATION IS LOCATED ABOUT 3.5 MILES NORTHEAST OF MEHOOPANY, 2.5 MILES SOUTHEAST OF MESHOPPEN AND 1 MILE NORTHWEST OF RUSSELL HILL. IT IS ON A HIGH RIDGE ON PROPERTY OWNED BY MR. STEVE LASCO. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 6 AND STATE HIGHWAY 87, AT RUSSELL HILL, GO NORTHWEST ON U.S. HIGHWAY 6 FOR 0.05 MILE TO A FORK, TAKE THE RIGHT FORK, OLD HIGHWAY 6, AND GO NORTHWEST FOR 0.2 MILE TO A PRIVATE DRIVE ON THE RIGHT, (TO REACH THE AZIMUTH MARK FROM THIS POINT, CONTINUE AHEAD ON THE OLD HIGHWAY FOR 0.3 MILE TO THE JUNCTION OF U.S. HIGHWAY 6, GO WEST ON U.S. HIGHWAY 6 FOR 0.3 MILE TO THE MARK ON THE RIGHT, JUST BEOFRE REACHING A LARGE CONCRETE CULVERT), TURN RIGHT AND GO NORTH ON THE PRIVATE DRIVE FOR 0.5 MILE TO WHERE A POWERLINE CROSSES THE ROAD AND THE STATION ON THE LEFT. THE STATION MARK IS 68 FEET NORTHEAST OF POWERLINE POLE NO. 919 AND 41 FEET WEST OF THE APPROXIMATE CENTER OF THE ROAD. THE MARK IS A STANDARD DISK SET IN THE TOP OF A SQUARE CONCRETE POST SET FLUSH WITH THE GROUND AND IS STAMPED LASCO 1968. NOTE- THE UNDERGROUND DISK IS STAMPED FLOREY 1968. REFERENCE MARK NO. 1 IS 46 FEET WEST OF THE APPROXIMATE CENTER OF THE ROAD AND 41 FEET NORTHEAST OF POWERLINE POLE NO. 919. THE MARK IS A STANDARD DISK SET IN THE TOP OF A SQUARE CONCRETE POST PROJECTING 1-INCH AND IS STAMPED LASCO NO 1 1968. REFERENCE MARK NO. 2 IS 92 FEET NORTH-NORTHEAST OF POWERLINE POLE NO. 919 AND 70 FEET EAST OF THE APPROXIMATE CENTER OF THE ROAD. THE MARK IS A STANDARD DISK SET IN THE TOP OF A SQUARE CONCRETE POST SET FLUSH WITH THE GROUND AND IS STAMPED LASCO NO 2 1968. THE AZIMUTH MARK IS 48 FEET SOUTHEAST OF THE SOUTH END OF THE CONCRETE CULVERT, 47 FEET EAST OF THE CENTERLINE OF THE NORTH BOUND TRAFFIC LANE OF U.S. HIGHWAY 6 AND 4.8 FEET EAST OF A METAL WITNESS POST AND WIRE FENCE. THE MARK IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN A 7 BY 10 FOOT BOULDER PROJECTING 18 INCHES AND IS STAMPED LASCO 1968. NOTE- A GEODIMETER TIE WAS MADE TO STATION DIETRICH 1929, THE DISTANCE BEING 155.737 METERS. HEIGHT OF LIGHT ABOVE STATION MARK 1 METERS.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1999.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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