Requesting Photos of Early USGS Bench Marks

Local benchmark in my hometown

> Specifically, I am looking for examples of the various datum codes. Many surveyors are oblivious to these, so if the USGS bench mark is dated after the 1920's or is a domed disk in concrete it is later than an example I am looking for.
>
> Typically these early bench marks do not have dates on them. Most of them are 3 1/2" iron posts with riveted bronze caps or flat bronze or aluminum tablets.
>

this may not be what you are looking for but here is a link to a reply I gave you a couple of years ago http://beerleg.com/index.php?mode=thread&id=19013
Since then I have more info on that plug as follows:

Set by A. F. Krause in 1896 on a level run between the Indian Lake Bridge and Aiden Lair. It was then recovered in 1942 by S.E. Mitchell running from the Minerva Lodge (near intersection of Northwood’s Club Rd. and Rt. 28) into the club and then on to the junction of the Indian River with the Hudson. The revised elevation in 1942 was 1,764.972'

Jim Vianna

sort of a bench mark

sorry, jerry. i had to...

sort of a bench mark

a "marked bench"?

Z-1 Ohio

A.K.A. LA0095

Pulpit Rock-PID OC0442
Monumented Unknown
First Documented Recovery 1912

Great photos, but please keep in mind, I am looking for USGS bench marks and not USC&GS.

> Great photos, but please keep in mind, I am looking for USGS bench marks and not USC&GS.

So the one I showed from 1896 in the Adirondacks is from the first year they started setting marks??

PID LL0163
NAD 83(1986) POSITION- 40 00 01. (N) 104 48 59. (W) SCALED

MARKER: DD = SURVEY DISK
LL0163_SETTING: 17 = SET INTO TOP OF METAL PIPE DRIVEN INTO GROUND
LL0163_SP_SET: METAL PIPE DRIVEN INTO GROUND
LL0163_STAMPING: 4969 DENVER
LL0163_MARK LOGO: USGS
LL0163_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
LL0163
LL0163 HISTORY - Date Condition Report By
LL0163 HISTORY - UNK MONUMENTED USGS
LL0163 HISTORY - 1956 GOOD CGS
LL0163 HISTORY - 1983 GOOD NGS

James - yes, the copper bolt is a great example if you don't mind if I use that one.

Perfect example of an early bench mark from the "DENVER" datum.

7150 EVAN SLAK

How bout this baby;

Set by L.C. Woodbury in 1899.

Exactly how the EVAN and S LAK datums actually fit together here (SW Corner of Wyoming), is somewhat intriguing to me.

Loyal

7150 EVAN SLAK

Looking North

East Face

North Face

West Face

South Face

Actually a reasonably logical spot to tie The Evanston (Wyoming) and Salt Lake (Utah) Datums together I suppose.

Loyal

7150 EVAN SLAK

Loyal - That is an excellent example of what I am looking for showing the codes for the Evanston and Salt Lake datums. Kurt Luebke has found a bench mark that combined both the MSLA and T (Missoula and Tacoma) datums. It is in one of the photos under the state of Montana.

7150 EVAN SLAK

I have 3 Email address's for you, but don't know which one (if any) are current. Drop me an Email (LDOGEO at AOL dot COM) and I'll send the 4 or 5 full resolution images (of the CAP) to you.

Loyal

7150 EVAN SLAK

I thought you were going to post a picture of a hog belly....

higher, higher, higher...;-)

Jerry, I don't know if this fits the criteria, but here's a thread from January 2012 for you [msg]117187[/msg]

Absolutely! That fits right in with the era I am researching and compiling the story on. They used the spikes and copper nail/washer around here, but I have never seen the aluminum ID tags.

C&GS T-14 = USGS 76 = Portland 4007

> I've started a website showing examples of early USGS bench marks. These began being placed in 1896 and continued until the 1920's.

THis reference is from C&GS Special Publication 177 (1932).

and this is from City of Portland's benchmark book.

So it still exists. I'll scare it up and get you a picture the next time I'm downtown Portland. Or maybe somebody else can beat me to it.

There are several other candidates in Portland as well.