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Details for Benchmark: FV1654

N 35° 21.513 W 120° 49.900 (NAD 83)

Altitude: 663

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

Location:
In SAN LUIS OBISPO county, CA View Original Datasheet
Designation:
BLACK HILL RESET
Marker Type:
traverse station disk
Setting:
in rock outcrop
Stability:
Probably hold position/elevation well.

Reference Points

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Found this while hiking with my boys to the top. We just stumbled on it.

[Photos:]
photoclose up
photoview towards Morro Rock

Driving from Morro Bay to Orange County today and doing a few detours. On a trip with Irvine Valley College on a geology field study. We were camping at the park this weekend, and we hike up Black Hill just after sunrise. Found the cache and showed the group. Glad there was at least one on the way up. Great views.

[Photos:]
photoReset
photoArea

Found while searching for nearby geocache. Benchmark is in good shape.

Found while grabbing the Black Hill Twofer cache

Found this one while searching for a good spot for a cache. Eventually placed cache nearby:
https://www.geocaching.com/geocache/GC5J4Y0_black-hill-two-fer

Found this while placing--and replacing--the Black Hills Two-Fer geocache. Great views from up here and my first officially logged benchmark, yay!!!

Saw this and the nearby USGS reference mark while seeking the Geocache.

both USGS and county marks. Remembered to log this one

[Photos:]
photoBlack Hill-USGS
photoFV1654 reset

Got while getting a geocache nearby.

Discovered this benchmark while searching for GC5J4Y0 Black Hill Two-Fer.

[Photos:]
photoFV1654
photoFV1654 Reset

A look around accidentally found this mark. Interesting, as this is the first benchmark that I found. -Octo

This benchmark has a long and storied history. The present mark at the location is described thusly in an NGS 2007 recovery report: "'THE NEW SURFACE MARK IS A CONCRETE CYLINDER, 12 INCHES IN
DIAMETER AND ABOUT 20 INCHES TALL, INSTALLED OVER THE SLEEVE AND ANCHORED TO THE ROCK BELOW, PRESERVING THE SUBSURFACE BOTTLE IN PLACE. A 2" BRONZE DISK STAMPED "COUNTY OF SAN LUIS OBISPO SURVEY MONUMENT, BLACK HILL RESET 2006 CLSA" WITH A 'CHISELED "X" WAS EMBEDDED IN THE CONCRETE CYLINDER ABOVE THE CENTER OF THE BOTTLE'S NECK. THE SURFACE MARK WAS SET BY MEMBERS OF THE CENTRAL COAST CHAPTER OF THE CALIFORNIA LAND SURVEYORS ASSOCIATION IN APRIL, 2006." (see photo: 2006 CLSA).
I also recovered an intact reference mark stamped "BLACK HILL 1881" to the Southeast, described in the 2007 recovery and a reference mark to the west described in the 2006 recovery as " RM 3 WHERE ONLY THE MOUNTING TUBE, ROCK DISCOLORATION AND EPOXY REMNANTS REMAIN" And a fourth mark, to the north which matches the description of earlier reference marks in the 1883 recovery as a "COPPER NAIL IN LEAD BOLT... TO THE NORTH..." No distances or reference angles appear in any of the various descriptions od the mark.
edexter

[Photos:]
photo2006 CLSA Surface marked and observed coords
photo1881 Ref. Mark to the SE
photoBolt described in 1883 recovery found to North
photoRM3 with remains to west matches 2006 description

Just stumbled over it. Not really. Great little hike and view.

[Photos:]
photoBlack Hill survey marker Morro Bay

Nice little hike for my family.

found as described

Found as described, and in good condition.

[Photos:]
photoBlack Hill Reset
County of San Luis Obispo Survey Monument Marked: 2006 CLSA PID: FV1654

nice walk

Found the northern and southern Black Hill Reference Marks while here for Zaulyn's "Black Hill Stash" cache. Lovely day, even if it was foggy.

[Photos:]
photoBlack Hill - southern reference mark
photoBlack Hill - northern reference mark
photoBlack Hill - northern reference mark - year 1992

Found both the county as well as one of the USGS markers.

Saw this while looking for Black Hill Stash cache

[This entry was edited by ke6dkf on Tuesday, May 26, 2009 at 10:12:01 PM.]

[Photos:]
photoSLO County Reset
County reset.
photoUSCGS 1881 (Black Hill NW)

Still one of my favorite places.!!

[Photos:]
photoFV1654 - Morro Bay State Park, Ca
photoFV1654 - RM SE
photoFV1654 - RM North
photoFV1654 - RM 3?
photoFV1654 - View North from RM SE
photoFV1654 - RM N disk flatness
photoFV1654 - RM SE disk flatness

One of my favorite places. Only got the N reference mark today, the 'benchmark' is overgrown and didn't take the time to dig through it ... hope that counts.

[This entry was edited by billwallace on Wednesday, April 01, 2009 at 9:55:04 PM.]

[Photos:]
photoBlack Hill, Morro Bay, Ca.
Pik of North Reference Marker with a TB

Discovered this bm while caching with VtoPB. Awesome view!!! TFTF

At least I found something up here while looking for a cache

Still there! I climbed black mountain today to drop off a "traveling cache." This is my first (and maybe only) benchmark.

Found as described. With NamGuy today.

Great place to be on a good day, watch a sunset, etc. EZ to find. Nice walk!

[Photos:]
photoblack_hill_01.jpg
photoblack_hill_02.jpg
photoblack_hill_03.jpg

After finding a Geocache, found this...

[This entry was edited by GeoBigDawg on Wednesday, October 24, 2007 at 2:13:48 PM.]

Previous reports of recovery are likely in error. None of the photos posted in previous reports are of the mark, but rather are of RMs. Datasheet has a 1993 recovery, but the 2002 report did not find. Recovered RM North and RM SouthEast. Also located the probable former location of RM3. I was unable to locate the station mark. I did not have my metal detector and did not attempt to excavate the station location.

[Photos:]
photoFV1654 RM North
Close-up of the RV1654 RM N. N35 21.523 W120 49.904
photoFV1654 RM N Location
Location of the FV1654 RM N showing the 1992 date.
photoFV1654 RM SouthEast
Close-up of FV1654 RM SE. N35 21.511 W120 49.897
photoFV1654 RM 3?
Probable location where FV1654 RM 3 was located. N35 21.513 W120 49.906

There are two reference on boulders here. Both of them are U.S. Coast & Geodetic Survey reference marks stamped "Black Hill 1881" but have obviously been updated since 1881 since one hmark has "1992" written in the cement attaching it to boulder. Both reference marks have arrows pointing to what I assume is the main benchmark location. I looked at the intersection point a while but couldn't find a benchmark. Someone with a metal detector might have better luck.

But here's the odd thing: The datasheet doesn't mention the stamping I found on the reference marks, nor does it have a 1992 entry for when the one reference mark was obviously cemented in. So I'm not sure what I found, but whatever they are, they don't match the datasheet.

[Photos:]
photoFV1654 Maybe Black Hill Northern-most.jpg
photoFV1654 Maybe Black Hill Northern-most Location.jpg
photoFV1654 Maybe Black Hill Southern-most.jpg
photoFV1654 Maybe Black Hill Southern-most location.jpg

We look each time we hike Black Hill. This benchmark isn't going anywhere.

[Photos:]
photoBlack Hill benchmark
Great 360 degree view from this point.

Found this on one of my regular hikes up the hill. I did the cache long ago though, just got into benchmarks and this one was close. A great place to catch a sunset.

I'm not sure which of the two marks at the top is the more official one... But I saw 'em both. I also saw TeamFireball's log, but it kinda looked to me like the arrows on both discs simply pointed north. At least, that's what I assumed... (shrug)

Came across this while searching for "low flying golf carts" cache. Nice bonus!!

Found it. While looking for Low-Flying Golf Carts geocache, I was hopping around the rocks and came across this.

[Photos:]
photoFV1654 Benchmark
Hike to top of Black Hill is rewarding. FV1654 benchmark there shows abuse.

FOUND ON A CACHE OUTING TODAY. AS I WAS LOOKING FOR THE CACHE I THOUGHT THERE SHOULD BE A BENCHMARK HERE AND THERE IT WAS.

I assumed that I had found it but I'm not sure now after reading the team fireball log. Must have been the same thing. Still fun looking.

We looked for this one several years ago on a Boy Scout outing and couldn't find it. My husband, who is a surveyor, thought he remembered looking for it for work a bunch of years ago and also couldn't locate. I looked again today with a little more knowledge than the first time and still had no luck. The spot I think it should be is right out in the open where almost everyone would pass that takes this hike, which makes me believe it is gone. We did find (again) two reference marks (look like benchmark discs with arrows instead of a triangle) that point to the triangulation point.

[last edit: 9/7/2003 9:03:11 PM PST]

Documented History (by the NGS)

01/01/1956 by CASLC (MONUMENTED)
DESCRIBED BY CALIFORNIA STATE LANDS COMMISSION 1956 THE STATION, TWO REFERENCE MARKS, AND THREE OF THE FOUR COPPER TACKS IN LEAD BOLTS (SET IN 1881) WERE RECOVERED. THE LEAD BOLT AND TACK ON THE W SIDE HAS BEEN DESTROYED. THE SURFACE MARK OF THE STATION HAS BEEN REMOVED BUT THE UNDERGROUND MARK (A GLASS BOTTLE) WAS FOUND 24 IN. BELOW THE GROUND SURFACE. THE BOTTLE WAS NOT SET IN CONCRETE (AS DESCRIBED IN 1919) BUT WAS STANDING ON BEDROCK. MEASUREMENTS FROM THE CENTER OF THE BOTTLE TO THE LEAD BOLTS AND TACKS AGREED WITH THE PUBLISHED DATA. THIS INDICATES THAT THE BOTTLE HAS NOT BEEN DISTURBED. A NEW SURFACE MARK WAS SET OVER THE BOTTLE. THIS MARK CONSISTS OF A CYLINDRICAL CONCRETE POST 20 IN. IN LENGTH AND 9 IN. IN DIAMETER. THE TOP WAS SET 2 IN. BELOW GROUND SURFACE. A STANDARD C.S.L.C. BRASS CAP WAS SET IN THE TOP OF THE CONCRETE POST AND STAMPED BLACK HILL RESET 1956. REFERENCE MARKS 1 AND 2 ARE STANDARD U.S.C. AND G.S. BRASS CAPS, UNSTAMPED AND SET IN OUTCROPPING BEDROCK. THE LEAD BOLTS AND TACKS ARE ALL SET IN DRILL HOLES IN NEARBY ROCKS. ALSO RECOVERED WAS A DUPLEX HEAD NAIL WITH AN ALUMINUM SHINER, STAMPED BLACK HILL NORTH M AND T 1954.
01/01/1956 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (JCB) LOCATED ON A PROMINENT SYMMETRICAL HILL, ABOUT 1 MI. SE OF MORRO BAY, AND 3/4 MI. S OF STATE HIGHWAY 1. REACHED FROM THE TOWN OF MORRO BAY AS FOLLOWS-- FROM THE POST OFFICE, GO W ONE BLOCK, TURN LEFT (S), GO 1 MI. TO MORRO STATE PARK ENTRANCE. PASS THROUGH ENTRANCE AND TURN LEFT (E), GO 0.2 MI. (PASSING GOLF CLUBHOUSE), TAKE LEFT FORK GO 0.8 MI. UPGRADE TO PARKING AREA AND END OF ROAD. FOLLOW TRAIL E TO TOP OF HILL AND STATION. A 10-MINUTE PACK. ORIGINAL REFERENCE-MARKS DISKS RECOVERED IN GOOD CONDITION. STATION MARK HAS BEEN REPLACED BY A CALIFORNIA STATE LANDS COMMISSION DISK, SET IN A 9- BY 20-IN. CONCRETE POST CENTERED OVER THE ORIGINAL BURIED BOTTLE, AND STAMPED BLACK HILL RESET 1956. CALIFORNIA STATE LANDS REPORTS THE ORIGINAL BURIED BOTTLE-STATION MARK AND THREE LEAD-PLUG REFERENCE MARKS WERE RECOVERED AFTER CHECKING DISTANCES BETWEEN THESE MARKS, A CALIFORNIA STATE LAND COMMISSION DISK WAS CENTERED OVER THE BOTTLE. AT THE TIME OF RESETTING THE MARK, NO DISTANCE MEASUREMENTS WERE TAKEN TO THE 1919 REFERENCE-MARK DISKS. FOLLOWING IS A COMPARISON BETWEEN THE 1942 AND 1956 DISTANCE AND DIRECTIONS TO THE ORIGINAL (1919) REFERENCE-MARK DISKS--
01/01/1961 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (CTH) STATION RECOVERED AND ALL MARKS FOUND INTACT. THE STATION MARK HAS BEEN RESET BY THE CALIF. STATE LANDS COMMISSION AND NOW BEARS THEIR STANDARD DISK. THE STATION IS WITHIN THE CONFINES OF THE MORRO BAY STATE PARK AND CAN BE REACHED VIA POSTED PAVED ROAD TO A WATER ON THE WEST SIDE OF THE HILL, THENCE BY FOOT UP TRAIL TO TOP. THE FOLLOWING MEASUREMENTS AND DIRECTIONS WERE TAKEN AT THIS DATE.
01/01/1961 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (EBB) THE STATION WAS RECOVERED IN GOOD CONDITION AS DESCRIBED BY J.C.B. 1956. THE REFERENCE DISK TO THE SOUTHEAST WAS RECOVERED AS WAS ALL FOUR LEAD PLUG REFERENCE POINTS. THE REFERENCE DISK TO THE NORTH IS GONE. THE DESCRIPTION TO REACH THE STATION IS ADEQUATE.
01/01/1973 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1973 (LDK) ALL MARKS WERE RECOVERED IN GOOD CONDITION, AND AS DESCRIBED. THE DESCRIPTION TO REACH IS ADEQUATE. HEIGHT OF LIGHT ABOVE STATION MARK 3.95 FEET.
01/01/1976 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976 (RBM) THE STATION, BOTH REFERENCE MARKS AND THE FOUR WITNESS MARKS (LEAD PLUGS) WERE RECOVERED AS DESCRIBED. ALL ARE IN GOOD CONDITION. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--1/2 MILE EAST OF MORRO BAY
01/01/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 (BIW) THE STATION AND TWO RMS WERE RECOVERED AS DESCRIBED BY C.T.H. IN 1961. RM 3, A BRASS DISK STAMPED BLACK HILL RM 3 1975 CDM AND G, WAS ALSO RECOVERED AND IS DESCRIBED HEREIN. WITNESS PLUGS AND TACKS SET IN DRILL HOLES IN NEARBY ROCKS WERE ALSO RECOVERED. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN 1 MILE SE OF MORRO BAY, CALIF.
03/25/1993 by NOS (GOOD)
RECOVERY NOTE BY NATIONAL OCEAN SERVICE 1993 (RCA) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in June 1996. 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 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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