Details for Benchmark: MY0039

N 42° 25.205 W 070° 55.840 (NAD 83)

Altitude: 77.1

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

Location:
In ESSEX county, MA View Original Datasheet
Designation:
RUCKMAN RESET
Marker Type:
triangulation station disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

Reference Points

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This site gives up its marks only grudgingly.

Another visit was made the day after Pearl Harbor Day, 2010, and RM5 was successfully found. An extensive hunt for RM6, however, came up empty, and it was too cold (windchill about 15d) to hang around and search for the previously-overlooked RM2.

RM5 lies beneath about a 15 foot- long log that lines the eastern edge of the packed-rock trail which runs north on the east side of the station toward Gun 2 of Btty Gardner. It was found by first erecting a 20 ft. collapsible orange rod next to the station disk and then sighting on this for a back bearing of 232dT. [The impossibly thick thorns make taping from the station impossible.] A Bing Maps photo suggested that the disk was near the edge of the trail, and proved to be quite accurate. The found disk was within about 3d of the bearing obtained by sighting with a hand-held compass over the 81 foot distance--not bad (or just lucky!). The metal detector wasn't much help, since the log put about 10 in. of wood atop RM5, and I was lucky to see it hiding beneath the log. In the Area photo of RM5, if you kept heading north from RM5, you'd be on top of Gun 2's firing platform in about another 100 ft.

RM6 was another story. The Bing map and my backsight (of 308dT) suggested that the disk was about in the middle of the trail running NE down the slope toward Gun 2, about on the east edge of the trail that heads north past RM5. I also measured out the 25 ft. call from the iron post. But after perhaps an hour of metal detector scanning, probing, and digging, over a 5x5 ft. area, no luck. [I actually suspect that this second mark may also be beneath a large log--the one that marks the top of the trail heading E and NE, but I couldn't move the log to check.]

I now know that the concrete wall referred to in the original description for RUCKMAN as the site of RM1 and RM2 was a side of a trench running N/S along the top of Btty Gardner and connecting the Battery Commander's (BC) station to a central access portal. Since RM1 (set in one of these walls) is now at the surface, RM2 (which seems to have fallen out of the Description in 1958) which is set in the E or W sidewall of the trench, may also be accessible. Looks like I'll have to keep slogging away at this site....

This entry was edited by pgrig on Friday, 10 December 2010 at 10:18:35.

[Photos:]
photoMY0039-RM5-Detail
RM5, hiding beneath its log.
photoMY0039-RM5-Area
Rust-colored stuff sack atop boundary log on right side of trail in mid-distance marks the position of RM5, beneath the log. Photo looks north. Station disk is to left rear, through heavy thorns, and Gun 2 of Btty Gardner is about 100 ft. further north past RM5. The trail to Gun 2 curves off to the W and then to the N, but following the bearing of the trail shown would lead you (after some painful bushwacking) to the top of Gun 2.

The station was found good on Pearl Harbor Day, 2009, along with RM1 and the referenced “small chimney.” It is judged that RM5 and RM6 should also be findable, but the hunt is hampered by thick, high brush and thorns, making taping quite difficult.

Shorelander’s report was followed. The referenced “small chimney” is key. There are three of these structures on the site, but the referenced one is to the (E) of the roadway that climbs up from the (N)—see photo. It is also misleading to call these the “small” chimneys, since there are several smaller ones (about 1 ft. square and standing about 3 ft. above ground) nearby.

But once the correct chimney is located, RM1 is found as described, and the station found by measuring 25 ft. in azimuth 53dT from the (NE) corner of the chimney. The station was found about 4 in. below the surface, in a monument sprayed orange, likely in 1979.

Flagging was tied above the station and backsighted to establish (with the Google Maps photo) the rough locations of RM5 and RM6, which seem to be along the border of the roadway that swings (S) and (E) of the station. Taping these precisely from the station will be difficult and painful, since the intervening areas are covered with thick, tall brush and heavy thorns.

RM2 seems to have fallen out of the Description in 1943, but no explanation for this was given. It should be searched for in a re-visit, set about 30.8 ft. NW of the station. A metal detector will likely be needed. This site will still reward hard work.

As for Ft. Ruckman itself, the mound-like hill upon which the station is located was apparently man-made (or heavily excavated) and covers the casemates for a pair of 12" coastal artillery guns. See the attached photo of the southernmost one of these. These guns were part of the harbor defenses of Boston, and were manned up through WW2. I heard tell (unconfirmed) that one of these guns was fired once, to test it, and this caused such consternation among the citizens of Nahant that it was not fired again.

[Photos:]
photoMY0039-Detail
photoMY0039-RM1-Detail
photoMY0039-Chimneys and RM1
photoMY0039-Station-From-Chimney
photoMY0039-Chimney-From-Station
photo12-in-Emplacement-Battery-Gardner

Well, I didn't have any luck finding the station itself. I poked and prodded the ground with sticks to see if I could hit concrete, but I didn't have any real luck. Someone with a metal detector would do much better than I did.

I didn't find RM5 or RM6 - those areas are teeming with thorns. Bring a machete if you want to search for them. I did find RM1, however. It was under some dirt (about 4 to 6 inches, maybe?), but it was there. I re-covered it, as I think this area is frequented by kids and I didn't want them making off with it. But it's a pretty straightforward find.

[Photos:]
photoRUCKMAN RESET (MY0039) RM1 closeup
photoMY0039 RM1 and the chimney in the description

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 (FLP) STATION IS A SECOND-ORDER STATION IN THE S PART OF THE TOWN OF NAHANT, ON THE E SIDE OF TRIMOUNTAIN ROAD, OPPOSITE HOUSE NO. 27, AND ON A HILL ON PROPERTY OF THE U.S. GOVERNMENT KNOWN AS FORT RUCKMAN. AN OPEN PASSAGEWAY, 3 FT. WIDE AND 1-1/2 FT. DEEP, WITH SIDES AND BOTTOM OF CONCRETE, RUNS N AND S ACROSS THE HILL TO THE W OF THE STATION. THE ENDS OF THIS PASSAGEWAY TERMINATE IN DEPRESSED AREAS, 15- BY 22-FT. AND 7-1/2 FT. DEEP. IT IS A STANDARD STATION DISK, STAMPED RUCKMAN 1934 AND SET IN THE TOP OF A TRUNCATED SQUARE PYRAMIDAL CONCRETE MONUMENT, 6 IN. SQUARE AT THE TOP, 12 IN. AT THE BOTTOM, AND 3 FT. DEEP, BURIED VERTICALY IN THE GROUND WITH THE TOP PROJECTING ABOUT 4 IN. THE SUB-SURFACE MARK IS A STANDARD DISK, SIMILARLY STAMPED AND SET IN A ROCK BURIED 6 IN. BELOW THE BOTTOM OF THE SURFACE MONUMENT, AND CENTERED UNDER THE SURFACE MARK. TWO STANDARD REFERENCE-MARK DISKS, STAMPED RUCKMAN NO 1 AND RUCKMAN NO 2 RESPECTIVELY, ARE SET FLUSH IN THE TOP OF THE CONCRETE WALL ON THE E SIDE OF THE PASSAGEWAY MENTIONED ABOVE. REFERENCE MARK 1 IS TO THE W AND S, AND REFERENCE MARK 2 IS TO THE W AND N. ADDITIONAL REFERENCE MEASUREMENTS FROM THE STATION ARE-- TO THE NORMAL INSIDE FACE OF THE E WALL OF THE PASSAGEWAY - 6.79 M. TO INSIDE THE NE CORNER OF THE DEPRESSED AREA AT THE S END OF THE PASSAGEWAY - 19.16 M. TO INSIDE THE SE CORNER OF THE DEPRESSED AREA AT THE N END OF THE PASSAGEWAY - 22.61 M. TO THE NE CORNER OF THE CHIMNEY ON THE E SIDE OF THE PASSAGEWAY - 7.58 M. SETUP IS GOOD ON SANDY SOIL. VIEW IS CLEAR FROM THE N THROUGH THE E, AND S TO THE SW, BUT IS OBSTRUCTED BY HOUSES TO THE W AND NW, AND TO NAHANT TO THE N. IN 1934, OBSERVATIONS WERE TAKEN FROM A 30-FT. INSTRUMENT TRIPOD WITH CORRESPONDING OBSERVING PLATFORM, WHICH WAS NECESSARY TO SEE STATIONS BEACH AND POINT OF PINES WITH ADEQUATE CLEARANCE. HEIGHT OF TARGET ABOVE STATION MARK 10 METERS.
1/1/1939 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 (LWS) STATION WAS RECOVERED AS DESCRIBED. THE GENERAL DESCRIPTION OF THE STATION IS GOOD, EXCEPT THAT NOW THERE IS A ROOF OVER THE PASSAGEWAY, RISING ABOUT 2 FT. ABOVE THE GROUND, AND THE SIDE WALLS ARE FLUSH WITH THE OUTSIDE FACE OF THE WALL OF THE PASSAGEWAY. REFERENCE MARKS 1 AND 2 ARE IN THE TOP OF THE CONCRETE WALLS, BUT DISTANCES COULD NOT BE CHECKED BECAUSE OF THE WOODEN SIDE WALLS AND ROOF.
1/1/1940 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1940 (PLB) STATION IS LOCATED ON THE U.S. GOVERNMENT RESERVATION KNOWN AS FORT RUCKMAN, ABOUT 1/2 MI. SW OF THE CENTER OF THE TOWN OF NAHANT, E OF THE TRIMOUNTAIN ROAD, ON TOP OF THE N HILL OF THE RESERVATION, AND APPROXIMATELY HALFWAY BETWEEN THE TWO 12-IN. GUNS THAT COMPRISE BATTERY GARDNER. A PASSAGEWAY, WITH CONCRETE SIDES AND BOTTOM AND WITH A WOOD ROOF, RUNS N AND S ACROSS THE HILL W OF THE STATION. IT IS A STANDARD STATION DISK, STAMPED RUCKMAN 1934 AND SET IN A 6-IN. SQUARE CONCRETE POST PROJECTING 4 IN. ABOVE GROUND. REFERENCE MARK 1 IS A STANDARD REFERENCE-MARK DISK, STAMPED RUCKMAN NO 1 AND SET IN A DRILL HOLE FLUSH WITH THE SURFACE OF THE E WALL OF THE PASSAGEWAY SW OF THE STATION. REFERENCE MARK 2 IS A STANDARD REFERENCE-MARK DISK, STAMPED RUCKMAN NO 2 AND SET IN THE SAME WALL NW OF THE STATION. SEVERAL BOARDS IN THE ROOF OF THE PASSAGEWAY MUST BE REMOVED TO EXPOSE THE REFERENCE MARKS TO VIEW. NO AZIMUTH MARK WAS ESTABLISHED. OBSERVATIONS MADE FROM A 16-FT. STAND.
1/1/1943 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1943 (PLB) THE STATION WAS RECOVERED AS DESCRIBED, BUT DUE TO THE CONSTRUCTION OF THE BATTERY, THE MARK WAS ABOUT 4 FT. UNDER GROUND. IT WAS RESET AND IS NOW FLUSH WITH THE GROUND. THE ORIGINAL STATION MARK IS NOW THE UNDERGROUND MARK. IT IS STAMPED RUCKMAN 1934 1943. TWO NEW REFERENCE MARKS, REFERENCE MARK 3 AND REFERENCE MARK 4, WERE ESTABLISHED. FOLLOWING IS A NEW DESCRIPTION-- THE STATION IS LOCATED ABOUT 0.5 MI. SW OF THE CENTER OF NAHANT, ON THE U.S. GOVERNMENT MILITARY RESERVATION OF FORT RUCKMAN. IT IS ABOUT 0.5 MI. S OF THE MAIN ENTRANCE TO THE RESERVATION, ON THE TOP OF BATTERY GARDNER. IT IS ABOUT 200 FT. S-SW OF THE DIRECTING ROOM, 200 FT. N OF THE EXTREME POINT OF THE HILL, AND 40 FT. E OF THE ROAD OVER THE HILL. IT IS STAMPED RUCKMAN 1934 1943 AND IS FLUSH WITH THE GROUND. REFERENCE MARK 1 IS SW OF THE STATION, 2 FT. SW OF THE SW CORNER OF A SMALL CONCRETE CHIMNEY, AND 20 FT. E OF THE ROAD. THE DISK IS STAMPED RUCKMAN NO 1 1934 AND IS FLUSH WITH THE GROUND SURFACE. REFERENCE MARK 3 IS E-NE OF THE STATION, ON THE E SLOPE OF THE HILL, AND 50 FT. E OF THE SMALL SENTRY BOX. THE DISK IS STAMPED RUCKMAN NO 3 1943 AND PROJECTS 4 IN. REFERENCE MARK 4 IS SE OF THE STATION, ON THE E SLOPE OF THE HILL, AND 45 FT. E OF THE NE CORNER OF A SMALL LOW CAMOUFLAGED BUILDING. THE DISK IS STAMPED RUCKMAN NO 4 1943 AND PROJECTS 4 IN.
1/1/1943 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1943 1 MI SW FROM NAHANT. 1.0 MILE SOUTHWEST OF THE TOWN HALL AT NAHANT, ESSEX COUNTY, ON BASS POINT, AT FORT RUCKMAN, 48.5 FEET EAST OF THE CENTER LINE OF THE ROAD OVER BATTERY GARDENER, 9.3 FEET NORTH OF A NORTHEAST-AND-SOUTHWEST ROW OF SHRUBBERY OVER THE BATTERY, 25 FEET NORTHEAST OF THE NORTHEAST CORNER OF A CONCRETE VENTILATOR, AND ON THE TOP OF THE DIRT FILL OVER THE BATTERY. A STANDARD TRIANGULATION-STATION DISK, STAMPED RUCKMAN 1943 1934 AND SET IN THE TOP OF A LARGE BLOCK OF CONCRETE FLUSH WITH THE GROUND.
1/1/1953 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1953 RECOVERED IN GOOD CONDITION.
1/1/1958 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1958 (GWM) THE STATION, REFERENCE MARKS 1, 3 AND 4 WERE RECOVERED IN GOOD CONDITION.* THE DIRECTION TO THE MARKS DID NOT CHECK. THE DISTANCE TO REFERENCE MARKS 1 AND 3 CHECKED. THE DISTANCE TO REFERENCE MARK 4 WAS FOUND TO BE 0.1 FOOT SMALLER THAN PREVIOUSLY MEASURED. THE REFERENCE POINTS MEASURED TO ALL THE MARKS WERE FOUND TO BE ACCURATE. A COMPLETE NEW DESCRIPTION AND TO REACH FOLLOWS. THE STATION IS ON A HIGH KNOLL ABOUT 0.5 MILE SOUTHEAST OF THE CENTER OF NAHANT ON U.S. ARMY NIKE SITE (LOCATION OF OLD FORT RUCKMAN). IT IS ABOUT 200 FEET SOUTHWEST OF THE DIRECTING ROOM, 200 FEET NORTH OF THE EXTREME POINT OF THE HILL, AND 40 FEET EAST OF THE CENTERLINE OF THE SMALL ROAD OVER THE HILL. THE MONUMENT IS FLUSH AND THE DISK IS STAMPED RUCKMAN 1934 1943. NOTE 1A 7A REFERENCE MARK 1 IS 2 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF A SMALL CONCRETE CHIMNEY AND 20 FEET EAST OF THE CENTERLINE OF THE ROAD. THE MONUMENT IS FLUSH AND THE DISK IS STAMPED RUCKMAN NO 1 1934. NOTE 11A REFERENCE MARK 3 IS ON THE EAST SLOPE OF THE HILL AND 50 FEET EAST OF THE SMALL SENTRY BOX. THE MONUMENT PROJECTS 4 INCHES AND THE DISK IS STAMPED RUCKMAN NO 3 1943. NOTE 11A REFERENCE MARK 4 IS ON THE EAST SLOPE OF THE HILL AND 45 FEET EAST OF THE NORTHEAST CORNER OF A SMALL LOW CAMOUFLAGED BUILDING. THE MONUMENT PROJECTS 2 INCHES AND THE DISK IS STAMPED RUCKMAN NO 4 1943. NOTE 11A TO REACH THE STATION FROM THE JUNCTION OF STATE HIGHWAYS 129 AND 1A IN THE EAST EDGE OF LYNN, GO SOUTHEAST ON HIGHWAY 129 (NAHANT STREET) FOR 0.4 MILE TO A T-STREET WHERE HIGHWAY 129 TURNS LEFT. TURN RIGHT AND GO SOUTH ON NAHANT ROAD FOR 3.9 MILES TO A SIDE ROAD RIGHT. TURN RIGHT AND GO SOUTHWESTERLY FOR 0.2 MILE TO A Y-FORK. KEEP RIGHT AND GO SOUTHERLY FOR 0.3 MILE TO A SIDE ROAD LEFT. CONTINUE STRAIGHT AHEAD FOR 0.1 MILE TO A FORK. KEEP LEFT AND GO SOUTHEAST ON CASTLE ROAD FOR 0.15 MILE TO GARDNER ROAD (CROSS STREET). TURN LEFT AND GO EAST 0.05 MILE TO A POINT WHERE THE STREET TURNS RIGHT. TURN RIGHT AND GO SOUTH 0.1 MILE TO A T-STREET. TURN LEFT AND GO EAST FOR ABOUT 100 FEET TO A METAL GATE AT THE ENTRANCE TO THE NIKE SITE AREA. PASS THROUGH GATE THEN PACK NORTH FOR 0.15 MILE TO TOP OF KNOLL AND STATION. *THE STATION WAS FOUND TO BE 4 FEET UNDERGROUND DUE TO CONSTRUCTION IN 1943. A NEW SURFACE MARK WAS SET AT THIS TIME AND THE ORIGINAL SURFACE MARK IS NOW THE UNDERGROUND MARK. STATION BASS POINT (USE) 1933 CAN BE USED AS AN AZIMUTH.
1/1/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 (CLN) THE STATION MARK AND REFERENCE MARK 1 WAS RECOVERED IN GOOD CONDITION. THE DISK FOR REFERENCE MARKS 3 AND 4 HAD BEEN KNOCKED OUT. REFERENCE MARKS 5 AND 6 WERE SET IN THE CONCRETE POST. THE DISTANCE AND DIRECTION TO REFERENCE MARK 1 CHECKED. A NEW DESCRIPTION FOLLOWS. THE STATION IS LOCATED ABOUT 1 MILE SOUTHWEST OF NAHANT, ON THE TOP OF A ABANDONED GUN BATTERY AND ABOUT 200 FEET NORTH OF THE SOUTH END OF THE BATTERY. TO REACH THE STATION FROM THE POST OFFICE IN NAHANT, GO WEST ON NAHANT ROAD FOR 1.1 MILES TO A SIDE ROAD LEFT. TURN LEFT AND GO SOUTH ON CASTLE ROAD FOR 0.8 MILE TO A OFF-SET CROSSROAD. CONTINUE SOUTH ON COLBY WAY FOR 0.15 MILE TO A T-ROAD. TURN LEFT AND GO EAST ON A PAVED ROAD FOR 0.05 MILE TO A CHAIN GATE AND THE END OF TRUCK TRAVEL. PACK NORTH UP A VERY STEEP HILL FOR ABOUT 0.1 MILE TO THE STATION. THE STATION MARK STAMPED---RUCKMAN 1934 1943---IS A STANDARD DISK SET IN THE TOP OF A 16-INCH ROUND CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND. IT IS 47 FEET SOUTH OF A 12-INCH MAPLE TREE, 25 FEET NORTHEAST OF THE NORTHEAST CORNER OF A 4 FEET BY 5 FEET CONCRETE CHIMNEY THAT PROJECTS 4 FEET AND 10 FEET NORTH OF A HEDGE ROW. REFERENCE MARK 1 STAMPED---RUCKMAN NO. 1 1934---IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN A CONCRETE WALL THAT IS FLUSH WITH THE GROUND. IT IS 6 FEET SOUTHWEST OF THE SOUTHEAST CORNER OF THE CONCRETE CHIMNEY AND 2 FEET SOUTH OF THE SOUTHWEST CORNER OF THE CHIMNEY. REFERENCE MARK 5 STAMPED---RUCKMAN 1934 NO 5 1979---IS A STANDARD DISK SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT THAT PROJECTS 2 INCHES. IT IS 106 FEET NORTHEAST OF THE NORTHEAST CORNER OF THE CONCRETE CHIMNEY AND 77 FEET EAST OF THE 12-INCH MAPLE TREE. REFERENCE MARK 6 STAMPED---RUCKMAN 1934 NO 6 1979---IS A STANDARD DISK SET IN THE TOP OF A 12-INCH SQUARE CONCRETE MONUMENT THAT PROJECTS 2 INCHES. IT IS 80 FEET EAST-SOUTHEAST OF THE SOUTHEAST CORNER OF THE CONCRETE CHIMNEY AND 25 FEET NORTH OF A IRON POST THAT PROJECTS 4 FEET OUT OF THE GROUND.
1/1/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in June 1998.
  • 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 Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.
  • The modeled gravity was interpolated from observed gravity values.

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