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Details for Benchmark: JS4086

N 38° 46.336 W 121° 12.621 (NAD 83)

Altitude: 521

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

Location:
In PLACER county, CA View Original Datasheet
Designation:
ROCKLIN
Marker Type:
triangulation station disk
Setting:
in a boulder
Stability:
Probably hold position/elevation well.

Reference Points

Must Read!

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Out grabbing some benchmarks. Found at N38° 46.336 W121° 12.621

*´¨) Thanks for the cache
¸.•´¸.•*´¨) ¸.•*¨)
(¸.•´¸.•*(¸.•' garybech AKA Circled "GB"

[Photos:]
photoRocklin 1939

I was out for a HOT lunchtime cache outing with stinkycheeseman and we decided to visit a benchmark (first for both of us). The three stakes referenced in a previous log are long gone but there is a path that takes you straight to the right spot. We had a most enjoyable time speculating about 1939.

For something different, Niedziel and I ventured out into this still fairly remote and barren area and found this gem. As we quickly came upon it, we both stared first at the benchmark and then at each other with a puzzled look, followed by the somewhat sarcastic remark... "Well, there it is". However, the date of 1939 printed on the benchmark was something to ponder as we walked away and wondered how this spot was chosen, how they may have traveled to it and what this area must have looked like back then, considering in 1939...

Adolf Hitler has taken over the rest of Czechoslovakia, occupying Bohemia and Moravia, and has annexed Memel.

The first American-made helicopter capable of sustained flight is demonstrated at Bridgeport, Conn., September 14 by Igor Sikorsky.

The first Volkswagens roll off the assembly line at Wolfsburg and are offered under the name KdF Wagen.

Hewlett-Packard is founded January 1 by California engineers William R. (Redington) Hewlett, 26, and David Packard, 27, who set up shop in the garage behind Packard's Palo Alto house to develop an audio oscillator that the two have invented.

Bell Laboratories begins construction in April of a prototype computer using the telephone relays employed by mathematician George R. Stibitz in 1937.

E. I. du Pont introduces nylon on a commercial basis, but most of it goes into parachutes and tents.

Glamour magazine begins publication at New York in April.

FM radio receivers go on sale for the first time.

American Telephone & Telegraph Co. (AT&T) introduces credit cards for traveling salesmen to use when making phone calls on the road.

Football helmets become mandatory in U.S. college football competition. The leather helmets have no face masks.

Popular songs: "Three Little Fishes" by Saxie Dowell. "Moonlight Serenade" by Glenn Miller

This is my first [B]Benchmark[/B] and i found it with [I]Phil in Sac and the Gang[/I]. TFTBM

Our first [b]Benchmark[/b] since we have been Geocaching. I'd recommend the first gate to enter not the second. Turn right and follow the fence. It's easy from there. [i]The Gang[/i] and [i]Dman from Sac[/i] liked this one. We'll have to search out some more!

This benchmark was found in good condition and within 7’ of the coordinates given. It was pretty easy to spot with three wooden stakes around it.

Documented History (by the NGS)

01/01/1939 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (FGJ) STATION IS 3.5 MILES EAST-NORTHEAST (AIRLINE) OF ROSEVILLE, 7.5 MILES NORTH-NORTHWEST (AIRLINE) OF FOLSOM, ON THE SUMMIT, AND TO THE SOUTH SIDE OF A FLAT-TOPPED HILL, IN T. 11 N., R. 7 E. DRIVE STATION. TO REACH FROM ROSEVILLE AND THE INTERSECTION OF U.S. HIGHWAYS 40 AND 99E, AND DOUGLAS STREET, GO EAST ON DOUGLAS STREET FOR 1.0 MILE, CONTINUE STRAIGHT AHEAD (EAST) ON OILED ROAD AT T-INTERSECTION WITH OILED ROAD FROM THE RIGHT (SOUTH), GO 2.45 MILES, TURN LEFT (NORTH) AT T-ROAD INTERSECTION AND SIGN, LOOMIS 7, FOLSOM 8 AND PROCEED NORTH AND EAST ON MAIN OILED ROAD TOWARD LOOMIS, GO 1.7 MILES, TURN LEFT (NORTH) OFF HIGHWAY, PASS THROUGH WIRE GATE, AND DOWNHILL ALONG LANE WHICH HAS FENCE ON WEST SIDE, GO 0.1 MILE, CROSS BRIDGE, GO 0.05 MILE, CROSS ANOTHER SMALL BRIDGE AND TURN RIGHT (NORTHEAST) IMMEDIATELY ONTO A TRACK ROAD LEADING UP HILL, GO 0.20 MILE, PASS THROUGH WIRE GATE (SMALL SHACK ON LEFT CLOSE TO ROAD) AND CONTINUE ON TRACK ROAD, GO 0.15 MILE, TAKE LEFT FORK AND PROCEED NORTHWESTERLY THROUGH TREES AND UP SLOPE TO SUMMIT AND STATION, DISTANCE OF 0.3 MILE. STATION IS ABOUT 200 FEET FROM SOUTH SLOPE OF HILL, ABOUT 200 FEET FROM NEAREST TREES OR BRUSH, ABOUT 70 FEET EAST OF OLD NORTH-SOUTH ROCK FENCE, ABOUT 55 FEET EAST OF NORTH-SOUTH WIRE FENCE LINE, IN GRASSY AREA ABOUT 2 FEET BELOW HIGHEST PART OF HILL, IN TOP OF BOULDER 12 BY 16 INCHES, PROJECTING 2 INCHES, STAMPED ROCKLIN 1939. OBSERVED FROM A 37-1/2-FOOT TOWER. ALL MARKS ARE STANDARD BRONZE DISKS OF THE U.S. COAST AND GEODETIC SURVEY. REFERENCE MARK NO. 1 IS IN TOP OF BOULDER 18 BY 24 INCHES, PROJECTING 6 INCHES, COUNTERSUNK 1-1/2 INCHES ON NORTH SIDE, FLUSH ON SOUTH SIDE, SAME LEVEL AS STATION, STAMPED ROCKLIN NO. 1 1939. REFERENCE MARK NO. 2 IS 4 INCHES BELOW TOP OF PARTIALLY BURIED BOULDER 12 BY 14 INCHES, PROJECTING 8 INCHES, SAME LEVEL AS STATION, STAMPED ROCKLIN NO. 2 1939. AZIMUTH MARK IS ABOUT 100 FEET EAST OF NORTH-SOUTH WIRE FENCE LINE, ABOUT 12 FEET SOUTH OF EAST-WEST ROCK FENCE, IN TOP OF PARTIALLY BURIED BOULDER ABOUT 3 FEET IN DIAMETER, PROJECTING 3 FEET, ABOUT SAME LEVEL AS STATION, AND STAMPED ROCKLIN 1939. A 4- BY 4-INCH WHITE POST WAS PLACED AT STATION MARK. HEIGHT OF LIGHT ABOVE STATION MARK - 14-1/2 METERS.
01/01/1939 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1939 RECOVERED IN GOOD CONDITION.
01/01/1954 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1954 (LSB) THE STATION, REFERENCE, AND AZIMUTH MARKS WERE RECOVERED AS DESCRIBED AND IN GOOD CONDITION. THE DISTANCES AND DIRECTIONS WERE FOUND TO AGREE WITH THE 1939 DATA. THE TO REACH PARAGRAPH WAS FOUND TO BE INADAQUATE. A COMPLETE DESCRIPTION FOLLOWS. THE STATION IS LOCATED ON THE SUMMIT, AND TO THE SOUTH SIDE OF A FLAT-TOPPED HILL THAT IS VERY ROCKY AND HAS TREES GROWING ON THE SOUTH AND EAST SLOPES. IT IS ABOUT 3-1/2 MILES AIRLINE EAST-NORTHEAST OF ROSEVILLE, AND ABOUT 7-1/2 MILES AIRLINE NORTH-NORTHWEST OF FOLSOM. TO REACH THE STATION FROM THE INTERSECTION OF U.S. HIGHWAYS 40 AND 99E AND DOUGLAS STREET IN ROSEVILLE GO EAST ON DOUGLAS STREET FOR 3.6 MILES TO A T-ROAD. TURN LEFT, NORTH, AND GO 0.9 MILE TO A T-ROAD RIGHT. KEEP STRAIGHT AHEAD, NORTH, AND GO 1.0 MILE TO A HOUSE ON THE RIGHT AND A GATE ON THE LEFT, THE ROAD TURNS TO THE RIGHT, EAST, FOR THE LAST 0.4 MILE. TURN LEFT, NORTH, PASS THROUGH THE GATE AND GO ALONG THE EAST SIDE OF A FENCE FOR 0.35 MILE TO A GATE. PASS THROUGH THE GATE AND TURN RIGHT, EAST, AND FOLLOW THE TRACK ROAD EAST AND NORTH FOR 0.2 MILE TO A FORK. TAKE THE LEFT FORK, NORTHWEST, AND GO UP THE STEEP HILL FOR 0.3 MILE TO THE SUMMIT AND THE STATION. THE LAST 0.3 MILE WILL REQUIRE A 4-WHEEL DRIVE TRUCK. THE STATION, REFERENCE, AND AZIMUTH MARKS ARE STANDARD DISKS SET IN DRILL HOLES IN BOULDERS. THE STATION DISK, STAMPED ROCKLIN 1939, IS 56 FEET EAST OF A WIRE FENCE, AND PROJECTS 3 INCHES. REFERENCE MARK 1, STAMPED ROCKLIN NO 1 1939, IS 80 FEET EAST OF THE WIRE FENCE. IT IS ABOUT THE SAME ELEVATION AS THE STATION, AND PROJECTS 10 INCHES. REFERENCE MARK 2, STAMPED ROCKLIN NO 2 1939, IS ABOUT 1 FOOT LOWER THAN THE STATION, AND PROJECTS 10 INCHES. THE AZIMUTH MARK, STAMPED ROCKLIN 1939, IS 125 FEET EAST OF A WIRE FENCE, 12 FEET SOUTH OF A ROCK FENCE, AND PROJECTS 14 INCHES. TO REACH THE MARK FROM THE STATION GO NORTH FOR 0.15 MILE TO THE ROCK FENCE AND THE MARK AS DESCRIBED. RESERVOIR (USGS) IS A STANDARD USGS DISK, UNSTAMPED, SET IN A DRILL HOLE IN A SQUARE-TOPPED BOULDER THAT PROJECTS 3 INCHES. IT IS IN THE NORTH-SOUTH ROCK FENCE LINE, 25 FEET WEST OF THE WIRE FENCE, AND ABOUT 1 FOOT HIGHER THAN THE STATION. OBSERVATIONS TAKEN FROM A 37 FOOT STEEL TOWER. ALL MEASUREMENTS ARE HORIZONTAL DISTANCES.
01/01/1959 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 (JEG) THE STATION WAS RECOVERED AND THE MARKS FOUND IN GOOD CONDITION. STATION WAS VISITED ONLY BY A LIGHTKEEPER. THE 1954 DESCRIPTION TO REACH IS ADEQUATE.
01/01/1975 by CADH (GOOD)
RECOVERY NOTE BY CA DIV OF HIGHWAYS 1975 (FAM) ROCKLIN 1939-GOOD ROCKLIN NO. 1 1939-GOOD ROCKLIN NO. 2 1939-GOOD TO REACH STATION FROM THE INTERSTATE 80 - DOUGLAS BOULEVARD INTERCHANGE, GO EAST ON DOUGLAS BOULEVARD 2.3 MILES TO THE INTERSECTION WITH SIERRA COLLEGE BOULEVARD. TURN LEFT AND GO 2.45 MILES ALONG SIERRA COLLEGE BOULEVARD IN A NORTHERLY THEN EASTERLY DIRECTION TO A POINT WHERE THERE IS A GATE ON BOTH SIDES OF THE ROAD. PASS THROUGH THE GATE ON THE RIGHT (SOUTHERLY) GO ALONG DIRT ROAD, WHICH PARALLELS A WIRE FENCE ON THE WEST SIDE OF THE ROAD, FOR 0.15 MILES. THE STATION IS 56 FEET EAST OF AFOREMENTIONED WIRE FENCE AND 82 FEET EAST OF AN OLD NORTH-SOUTH ROCK FENCE. THE STATION AND REFERENCES ARE STANDARD DISKS SET IN DRILL HOLES IN BOULDERS. THE 1954 DESCRIPTIONS FOR LOCATING THE REFERENCES ARE ADEQUATE. THE AZIMUTH MARK WAS NOT SEARCHED FOR.
05/20/1991 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 THE STATION IS LOCATED ON THE SUMMIT AND TO THE SOUTH SIDE OF A FLAT-TOPPED HILL THAT IS VERY ROCKY AND HAS TREES GROWING ON THE SOUTH AND EAST SLOPES, ABOUT 7.5 MI (12.1 KM) NORTH-NORTHWEST OF FOLSOM AND 3.5 MI (5.6 KM) EAST-NORTHEAST OF ROSEVILLE. OWNERSHIP--CONTACT MR JERRY PETERSON, A-ALL MINI-STORAGE, 3050 TAYLOR ROAD, ROSEVILLE CA. TO REACH THE STATION FROM THE EUREKA ROAD/ATLANTIC AVENUE EXIT OF INTERSTATE HIGHWAY 80 IN ROSEVILLE, GO SOUTHEAST ON EUREKA ROAD FOR 1.3 MI (2.1 KM) TO DOUGLAS BOULEVARD. TURN LEFT AND GO EAST FOR 1.1 MI (1.8 KM) TO THE JUNCTION OF SIERRA COLLEGE BOULEVARD. TURN LEFT AND GO NORTH FOR 2.4 MI (3.9 KM) TO A SIGN ROCKLIN CITY LIMIT WHERE THE ROAD TURNS TO THE NORTHEAST. CONTINUE NORTHERLY FOR ABOUT 0.1 MI (0.2 KM) TO THE SECOND OF TWO GATES INTO A FIELD ON THE RIGHT. (THIS IS A LOCKED GATE AND THE PROPERTY IS PRESENTLY -1991- UP FOR SALE). TURN RIGHT AND GO THROUGH THE GATE. TURN RIGHT AND GO SOUTHEAST FOR ABOUT 0.1 MI (0.2 KM) TO THE INTERSECTION OF ANOTHER FENCE. TURN LEFT AND FOLLOW THE FENCE FOR ABOUT 0.05 MI (0.08 KM) TO THE STATION ON THE LEFT. THE STATION IS A STANDARD CGS HORIZONTAL DISK SET IN A DRILL HOLE IN A BOULDER, ABOUT 200 M (656.2 FT) PACK FROM THE LOCKED GATE. LOCATED 56 FT (17.1 M) EAST OF A WIRE FENCE.
08/06/1993 by CADT (GOOD)
RECOVERY NOTE BY CALTRANS 1993 THE STATION MARK AND REFERENCE MARKS NO. 1 AND NO. 2 WERE RECOVERED AS DESCRIBED. THE AZIMUTH MARK WAS NOT SEARCHED FOR. A NEW TO REACH FOLLOWS. $ TO REACH THE STATION FROM THE INTERSTATE HIGHWAY 80 - DOUGLAS BOULEVARD INTERCHANGE IN ROSEVILLE, GO EAST ON DOUGLAS BOULEVARD FOR 2.4 MI (3.9 KM) TO THE INTERSECTION OF SIERRA COLLEGE BOULEVARD. TURN LEFT AND GO NORTH AND NORTHEAST ON SIERRA COLLEGE BOULEVARD FOR 2.5 MI (4.0 KM) TO THE SECOND OF TWO GATES INTO A FIELD ON THE RIGHT. (SIERRA COLLEGE BOULEVARD BEGINS A DOWNGRADE AT THIS POINT). TURN RIGHT AND GO THROUGH THE GATE. TURN RIGHT AGAIN AND GO SOUTHWEST (PARALLEL WITH SIERRA COLLEGE BOULEVARD) FOR 0.1 MI (0.2 KM) TO A FIELD FENCE. TURN LEFT AND FOLLOW THE FENCE FOR ABOUT 0.05 MI (0.08 KM) TO THE STATION ON THE LEFT.
06/09/1994 by CADT (GOOD)
RECOVERY NOTE BY CALTRANS 1994 (JCB) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in May 1992. The horizontal coordinates are valid at the epoch date displayed above. The epoch date for horizontal control is a decimal equivalence of Year/Month/Day.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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