Benchmark Description question?

[Garminator]

I've seen this a hundred times........What does "recovery note" exactly mean? Does it mean that the mark was recovered and retired(meaning, no more!)or it it a way of saying that it was found in it's location? Sorry for the lame question! I've seen recovery notes by NGS and also by LOCENGFIRM (or something like that)

 

Reason I ask this is because I've also seen "Descrition by NGS" usually but not always followed up by a "Recovery note". 10 times out of 10 the structure that mark was originally set is non-existant.

 

TIA

 

Garminator

 

"I seen Elvis making crop circles"

[Z15]

Recoverey note means a report of someone searching for the mark and the condition it was found in, + any new information to help locate the mark in the furure. Everytime someone sends in a credible report it gets updated. Its the history of use etc. It speaks for itself.

 

If you are just looking at datasheets on this site, you will find they are an abbreviated form of the complete document.

 

LOCENGFIRM just means "local engineering firm" found or did not find the mark at that pariticular time. There are 1000's of codes in use describing various agencys, orgs, etc. When the person enters this code, the sybase program knows the tect to add to the database to agent the term "Recovery by Michgian Department of Transporation 2002 (MPR)"

 

see example below

 

 

 

The NGS Data SheetSee file dsdata.txt for more information about the datasheet.DATABASE = Sybase ,PROGRAM = datasheet, VERSION = 6.67

1 National Geodetic Survey, Retrieval Date = DECEMBER 7, 2002

SG0178 ***********************************************************************

SG0178 DESIGNATION - BUMBLETOWN MIGS 1934

SG0178 PID - SG0178

SG0178 STATE/COUNTY- MI/HOUGHTON

SG0178 USGS QUAD - AHMEEK (1980)

SG0178

SG0178 *CURRENT SURVEY CONTROL

SG0178 ___________________________________________________________________

SG0178* NAD 83(1994)- 47 16 48.14714(N) 088 25 41.44219(W) ADJUSTED

SG0178* NAVD 88 - 377. (meters) 1237. (feet) SCALED

SG0178 ___________________________________________________________________

SG0178 LAPLACE CORR- -14.05 (seconds) DEFLEC99

SG0178 GEOID HEIGHT- -34.19 (meters) GEOID99

SG0178

SG0178 HORZ ORDER - THIRD

SG0178

SG0178.The horizontal coordinates were established by classical geodetic methods

SG0178.and adjusted by the National Geodetic Survey in February 1997.

SG0178

SG0178.The orthometric height was scaled from a topographic map.

SG0178

SG0178.The Laplace correction was computed from DEFLEC99 derived deflections.

SG0178

SG0178.The geoid height was determined by GEOID99.

SG0178

SG0178; North East Units Scale Converg.

SG0178;SPC MI N - 278,484.790 7,891,947.327 MT 1.00005400 -1 01 56.2

SG0178;UTM 16 - 5,237,273.875 391,991.412 MT 0.99974337 -1 02 57.7

SG0178

SG0178: Primary Azimuth Mark Grid Az

SG0178:SPC MI N - CALUMET FIRE TOWER MIGS 1934 158 15 00.7

SG0178:UTM 16 - CALUMET FIRE TOWER MIGS 1934 158 16 02.2

SG0178

SG0178|---------------------------------------------------------------------|

SG0178| PID Reference Object Distance Geod. Az |

SG0178| dddmmss.s |

SG0178| SG0183 CALUMET FIRE TOWER MIGS 1934 APPROX. 3.5 KM 1571304.5 |

SG0178| SG0174 CALUMET C H COPPER CO SUPR STK APPROX. 4.2 KM 1991233.2 |

SG0178|---------------------------------------------------------------------|

SG0178

SG0178 SUPERSEDED SURVEY CONTROL

SG0178

SG0178 NAD 83(1986)- 47 16 48.14202(N) 088 25 41.41454(W) AD( ) 3

SG0178 NAD 27 - 47 16 48.40000(N) 088 25 40.98000(W) AD( ) 3

SG0178

SG0178.Superseded values are not recommended for survey control.

SG0178.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.

SG0178.See file dsdata.txt to determine how the superseded data were derived.

SG0178

SG0178_U.S. NATIONAL GRID SPATIAL ADDRESS: 16TCT9199137274(NAD 83)

SG0178_MARKER: DD = SURVEY DISK

SG0178_SETTING: 66 = SET IN ROCK OUTCROP

SG0178_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL

SG0178_SATELLITE: THE SITE LOCATION WAS REPORTED AS NOT SUITABLE FOR

SG0178+SATELLITE: SATELLITE OBSERVATIONS - August 23, 2001

SG0178

SG0178 HISTORY - Date Condition Report By

SG0178 HISTORY - 1934 MONUMENTED MIGS

SG0178 HISTORY - 20010823 GOOD MIDT

SG0178

SG0178 STATION DESCRIPTION

SG0178

SG0178'DESCRIBED BY MICHIGAN GEODETIC SURVEY 1934 (CMC)

SG0178'ON BUMBLETOWN HILL IN SEC. 1, T. 56 N., R. 33 W., ON THE

SG0178'HIGHEST POINT AT THE NORTHEAST END OF A PROMINENT RIDGE.

SG0178'

SG0178'TO REACH FROM CALUMET, DRIVE ON THE MAIN HIGHWAY TOWARD COPPER

SG0178'HARBOR TO ALLOUEZ LOCATION, TURN WEST AT ALLOUEZ AT THE

SG0178'HOUGHTON-KEWEENAW COUNTY LINE AND DRIVE 0.6 MILE TO WHERE A

SG0178'ROAD LEADING SOUTHWEST LEAVES THE MAIN ROAD, FOLLOW THIS

SG0178'BRANCH ROAD, KEEPING TO THE RIGHT, FOR 0.9 MILE TO A POINT

SG0178'ABREAST THE NORTHEAST END OF A PROMINENT RIDGE, WHICH EXTENDS

SG0178'SOUTHWEST-NORTHEAST ON THE WESTERLY SIDE OF THE ROAD. PARK

SG0178'CAR AND WALK 75 PACES NORTHWEST TO THE STATION.

SG0178'

SG0178'SURFACE MARK IS A STANDARD U.S.C. AND G.S. AND S.S. BRONZE

SG0178'DISK SET IN CONCRETE IN OUTCROPPING BEDROCK.

SG0178'

SG0178'EITHER THE CENTER OF THE CAB AT CALUMET FIRE TOWER OR THE

SG0178'LARGE STACK AT THE SUPERIOR BOILER HOUSE (C AND H CO.) IN

SG0178'CALUMET MAY BE USED AS AZIMUTH MARK FOR THIS STATION.

SG0178

SG0178 STATION RECOVERY (2001)

SG0178

SG0178'RECOVERY NOTE BY MICHIGAN DEPARTMENT OF TRANSPORTATION 2001 (MPR)

SG0178'NOTE--THE BRANCH ROAD IS BIRCH STREET, LAST 0.6 MI IS VERY ROUGH TWO

SG0178'TRACK RD. SOMEONE ATTEMPTED TO REMOVE THE DISK BY DRIVING A LARGE

SG0178'SPIKE UNDER IT, IT IS BENT UPWARDS BUT OTHERWISE SECURE. AT THE

SG0178'EXTREME NE EDGE OF THE ROCK OUTCROP, NO CLEAR VISION IN ANY DIRECTION

SG0178'DUE TO TREES.

 

*** retrieval complete.

Elapsed Time = 00:00:03

[survey tech]

The NGS uses the word recovered in the sense that any marker, having been put in place and left to the mercy of fate for some length of time, must be visited and seen to confirm that it has survived. It is not intended to imply that the marker has been removed, although it is understandable that people are often confused by this use of the word recovery. I have never heard of a marker being retired. If the information pertaining to a particular marker is determined to be inaccurate, the coordinates and/or elevation data is adjusted or revised, but the marker is left in place.

[Garminator]

Elcamino and Survey,

 

Thanks for the replies!

 

I used the word "retired" for lack of a better word.

 

Some of my benchmark hunting areas encompass abandoned railway beds, bridges, etc. When I read the description and go to the area, "no bridge" to be found.....and I know from when I was a kid that there used to be one there.

 

On these same "No find" benchmarks, some mention Recovered by NGS, etc. and figured it meant that it was given back, retired(for lack of better terms) to the Coastal and Geodetic dudes. Now, I see that it means that it was only "found" on that date.

 

Thanks,

 

Garminator

 

"I seen Elvis making crop circles"......................Are the Soprano's on yet?

 

Edit:typo

 

[This message was edited by Garminator on December 08, 2002 at 03:17 PM.]