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Details for Benchmark: AC4061

N 25° 57.422 W 080° 25.832 (NAD 83)

Altitude: 4.89

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

Location:
In BROWARD county, FL View Original Datasheet
Designation:
SNAKE
Marker Type:
triangulation station disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

Reference Points

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Found this easy just follow the arrow and behind sticks.

[Photos:]
photoA few feet away
photoClose up

Now that I know what I'm doing, I finally found it.

[Photos:]
photoSNAKE
photoSNAKE - Embedded in bedrock
photoSNAKE - Looking at RM 3
photoSNAKE - Looking at RM 1

Found this one with Gungadoy after about an hour of searching and a lot of digging.

Found this one with Dockdog after an hour of searching. We also recovered RM1 & RM3.
Found the Azimuth mark, east down the canal a couple of days later.
This is a standard USC&GS Triangulation Station mark.

This entry was edited by Gungadoy on Saturday, 04 October 2014 at 13:37:30 UTC.

[Photos:]
photoAC4061-GPS-20140930
photoAC4061-SNAKE-2-20140930
photoAC4061-SNAKE-3E-20140930

Found monument visually undisturbed.

[Photos:]
photoSNAKE 1971 (AC4061)

Also found it while looking for AB7722

While looking for AB7722.

Found with loving exoticdvm. This one had us fooled!!! TFTBM!! >^..^<

Found this while looking for multi-cache M9A8. Not the right benchmark for the cache though! This one fooled us!!

Found this one while out searching for another one.

Found this one while searching for GCM9A8

[Photos:]
photoSnake BM

Found this benchmark while working on geocache GCM9A8.

found cause of cache

Documented History (by the NGS)

1/1/1971 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1971 (NCA) STATION IS ABOUT 13-1/4 MILES SOUTH OF ANDYTOWN, 10 MILES WEST OF CAROL CITY, 3 MILES SOUTH OF THE JUNCTION OF U.S. HIGHWAY 27 AND STATE S-820 (HOLLYWOOD BOULEVARD), ON THE EAST SIDE OF U.S. HIGHWAY 27, ON THE NORTH SIDE OF SNAKE CREEK CANAL ALONG THE BROWARD AND DADE COUNTY LINE AND ON PROPERTY OWNED BY THE STATE. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 27 AND STATE HIGHWAY S-820 (HOLLYWOOD BOULEVARD) ABOUT 18 MILES WEST OF HOLLYWOOD, GO SOUTH ON HIGHWAY 27 FOR 3.6 MILES TO A BRIDGE OVER THE SNAKE CREEK CANAL AT THE BROWARD AND DADE COUNTY LINE. TURN LEFT AND GO EAST ALONG THE NORTH SIDE OF THE CANAL FOR 0.05 MILE TO A GATE AND STATION JUST EAST OF GATE AS DESCRIBED. STATION MARK, STAMPED SNAKE 1971, IS A STANDARD DISK CEMENTED IN A DRILL HOLE IN BEDROCK WHICH IS ABOUT 12 INCHES BELOW THE GROUND SURFACE. IT IS 84 FEET EAST-NORTHEAST OF CENTER OF THE GATE, 44 FEET NORTH OF THE NORTH EDGE OF THE CANAL, 26 FEET NORTH OF CENTER OF THE ROAD AND 13.2 FEET SOUTH-SOUTHWEST OF A METAL WITNESS POST. REFERENCE MARK 1, STAMPED SNAKE NO 1 1971, IS A STANDARD DISK SET IN A ROUND CONCRETE POST FLUSH WITH THE GROUND. IT IS 160 FEET EAST OF CENTER OF THE GATE, 13 FEET SOUTH OF CENTER OF THE ROAD, 3 FEET NORTH OF THE NORTH EDGE OF THE CANAL AND 1.3 FEET NORTH OF A METAL WITNESS POST. REFERENCE MARK 2, STAMPED SNAKE NO 2 1971, IS A STANDARD DISK SET IN A ROUND CONCRETE POST FLUSH WITH THE GROUND. IT IS 24.5 FEET NORTH OF THE EAST END OF THE NORTH 1 OF 4 METAL CULVERTS, 9.5 FEET SOUTH OF CENTER OF THE GATE AND ROAD AND 2 FEET SOUTH OF THE SOUTH GATE POST. AZIMUTH MARK, STAMPED SNAKE 1971, IS A STANDARD DISK SET IN A ROUND CONCRETE POST FLUSH WITH THE GROUND. IT IS 13 FEET SOUTH OF CENTER OF THE ROAD, 4 FEET NORTH OF THE NORTH EDGE OF THE CANAL AND 2.7 FEET NORTH OF A METAL WITNESS POST. TO REACH THE AZIMUTH MARK FROM THE STATION, GO EAST ON THE GRAVELED ROAD FOR 0.25 MILE TO THE MARK ON THE RIGHT AS DESCRIBED. HEIGHT OF LIGHT ABOVE STATION MARK 30 METERS.
1/1/1981 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1981 (LPW) SNAKE STATION MARK 1971 RECOVERED GOOD. SNAKE NO. 1 1971 RECOVERED GOOD. REFERENCE MARK NO. 2 FOUND TO BE DESTROYED BY GUNFIRE, BRASS CAP IS RUINED, CONCRETE POST REMAINS. DISTANCE AND DIRECTION FROM NEAREST TOWN--3 MILES SOUTH OF JUNCT. US 27 AND SR820, .05 MILE EAST OF U.S. 27.
2/6/1984 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 (CLN) STATION MARK, REFERENCE MARK 1, AND AZIMUTH MARK WERE RECOVERED IN GOOD CONDITION. THE ENTIRE AREA HAS CHANGED AND THE GATE WAS GONE AND ALL WITNESS POSTS WERE GONE. REFERENCE MARK 2 WAS FOUND DESTROYED. THE DISTANCE TO REFERENCE MARK 1 CHECKED. A DIFFERENCE OF 02 MINUTES 20.7 SECONDS WAS OBSERVED TO REFERENCE MARK 1. REFERENCE MARK 3 WAS ESTABLISHED AT THIS TIME. THE DISTANCE WAS MEASURED TO THE AZIMUTH MARK AND IT WAS POSITIONED. DUE TO CHANGES, A COMPLETE NEW DESCRIPTION FOLLOWS. THE STATION IS LOCATED ABOUT 30.40 KM (18.89 MI) WEST-SOUTHWEST OF HOLLYWOOD, 16.00 KM (9.94 MI) WEST OF CAROL CITY, 5.76 KM (3.58 MI) SOUTH OF THE JUNCTION OF US HIGHWAY 27 AND STATE HIGHWAY 820 (HOLLYWOOD BOULEVARD) THAT IS ABOUT 28.80 KM (17.90 MI) WEST OF HOLLYWOOD, ON THE NORTH SIDE OF SNAKE CREEK CANAL ALONG THE BROWARD AND DADE COUNTY LINE AND ON PROPERTY OWNED BY THE STATE. TO REACH THE STATION FROM THE JUNCTION OF US HIGHWAY 27 AND STATE ROUTE 820 (HOLLYWOOD BOULEVARD) THAT IS ABOUT 28.80 KM (17.90 MI) WEST OF HOLLYWOOD, GO SOUTH ON US HIGHWAY 27 FOR 5.76 KM (3.58 MI) TO SNAKE CREEK CANAL AND STATION ON LEFT. THE STATION IS A STANDARD CGS DISK STAMPED SNAKE 1971, CEMENTED IN A DRILL HOLE IN BEDROCK THAT IS FLUSH WITH THE GROUND LEVEL LOCATED 109.5 FT (33.38 M) E OF THE CENTER OF THE NORTH BOUNDLANE OF US HIGHWAY 27, 46.0 FT (14.02 M) N OF THE NORTH EDGE OF CANAL, 43.3 FT (13.20 M) NE OF THE NORTH CORNER OF A NORTHEAST WING WALL OF CANAL CULVERT, 42.5 FT (12.95 M) SSW OF A FENCE CORNER, AND 4.2 FT (1.28 M) E OF A WITNESS POST. THE UNDERGROUND MARK IS A STANDARD CGS DISK STAMPED SNAKE 1971. REFERENCE MARK NO 1 IS A STANDARD CGS DISK STAMPED SNAKE NO 1 1971, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 12 INCHES OR .30 CM IN DIAMETER FLUSH WITH GROUND LOCATED 188.0 FT (57.30 M) E OF THE CENTER OF THE NORTHBOUND LANE OF US HIGHWAY 27, 100.0 FT (30.48 M) E OF THE NORTH CORNER OF THE NORTHEAST WINGWALL OF CANAL, 106.0 FT (32.31 M) SE OF THE FENCE CORNER ON NORTH SIDE OF CANAL ROAD, AND 2.0 FT (0.61 M) N OF THE NORTH EMBANKMENT OF CANAL. REFERENCE MARK 3 IS A STANDARD NGS DISK STAMPED SNAKE 1971 NO 3 1984, SET IN THE NORTH CORNER OF A HEADWALL FOR CULVERTS UNDER HIGHWAY FOR SNAKE RIVER LOCATED 66.0 FT (20.12 M) E OF THE CENTER OF THE NORTHBOUND LANE OF AS HIGHWAY 27, 30.0 FT (9.14 M) S OF CENTER OF ROAD ON NORTH SIDE OF CANAL, 17.5 FT (5.33 M) N OF THE CENTER OF THE EAST HEADWALL, 1.0 FT (0.30 M) E OF A WITNESS POST, AND 1.5 FT (0.46 M) HIGHER THAN THE STATION. AZIMUTH IS A STANDARD CGS DISK STAMPED SNAKE 1971, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 12 INCHES OR .30 CM IN DIAMETER FLUSH WITH GROUND LOCATED 79.0 FT (24.08 M) S OF A WIRE FENCE, 78.0 FT (23.77 M) SW OF AN 8-INCH AUSTRALIAN PINE TREE, 18.0 FT (5.49 M) S OF THE CENTER OF THE CANAL ROAD, 2.0 FT (0.61 M) N OF THE NORTH EDGE OF CANAL EMBANKMENT, AND 1.5 FT (0.46 M) NE OF A WITNESS POST. TO REACH THE AZIMUTH MARK FROM STATION, GO EAST ON THE NORTH SIDE OF SNAKE CANAL FOR 0.40 KM (0.25 MI) TO MARK ON RIGHT.
8/3/1993 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1993 (RLT) THE STATION IS ABOUT 14.5 MI (23.3 KM) SOUTHWEST OF COOPER CITY, 26.0 MI (41.8 KM) NORTH-NORTHWEST OF MIAMI, AT THE DADE-BROWARD COUNTY LINE IN SECTION 34, TOWNSHIP 51 SOUTH, RANGE 39 EAST. TO REACH THE STATION FROM THE INTERSECTION OF U.S. HIGHWAY 27 AND THE EASTBOUND LANES OF INTERSTATE 75 (ALLIGATOR ALLEY), GO SOUTH ON U.S. HIGHWAY 27 FOR 5.90 MI (9.49 KM) TO THE INTERSECTION OF STATE HIGHWAY 818 (GRIFFIN ROAD), CONTINUE SOUTH ON U.S. HIGHWAY 27 FOR 3.55 MI (5.71 KM) TO THE INTERSECTION OF PINES BOULEVARD, CONTINUE SOUTH ON U.S. HIGHWAY 27 FOR 7.75 MI (12.47 KM) TO THE DADE-BROWARD COUNTY LINE AND THE STATION ON THE LEFT, SET IN THE TOP OF A ROCK OUTCROP 2.0 FT (0.6 M) BELOW THE LEVEL OF U.S. HIGHWAY 27 AND RECESSED 0.1 FT (3.0 CM) BELOW THE LEVEL OF THE GROUND. LOCATED 110.0 FT (33.5 M) EAST OF THE CENTERLINE OF THE NORTHBOUND LANES OF U.S. HIGHWAY 27, 88.5 FT (27.0 M) WEST-NORTHWEST OF SNAKE NO 1 1971, 85.7 FT (26.1 M) EAST OF THE EDGE OF THE ASPHALT OF THE NORTHBOUND LANES OF U.S. HIGHWAY 27, 67.5 FT (20.6 M) NORTHEAST OF SNAKE NO 3 1971 1984, 41.5 FT (12.6 M) NORTHWEST OF THE CENTER OF THE YELLOW LOCKED GATE AND 26.0 FT (7.9 M) NORTH OF THE APPROXIMATE CENTERLINE OF THE DIRT ROAD ON THE NORTH SIDE OF THE CANAL.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in May 1991.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in March 1997.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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