<br><font size=2 face="sans-serif">Oh Nathan,</font>
<br>
<br><font size=2 face="sans-serif">When grounding instruments in the vault,
I have feed the ground wire all the way through the conduit to the electronic
shelter (usually 30-50' distant to try to escape noise contamination of
the 15-25' Rohn towers I have used ) and grounded to the same ground bus
on the shelter there.</font>
<br>
<br><font size=2 face="sans-serif">******************************************************************************<br>
Mark E. Meremonte Geophysicist
USGS/ANSS/NEIC<br>
<br>
U.S. Geological Survey Work: 303-273-8670 Cell:
303-478-5766<br>
MS 966, Box 25046 Email:
meremonte@usgs.gov<br>
Denver, CO 80225
Web: </font><a href=http://geohazards.cr.usgs.gov/><font size=2 face="sans-serif">http://geohazards.cr.usgs.gov</font></a><font size=2 face="sans-serif"><br>
<br>
Ship: U.S. Geological Survey, 1711 Illinois St., Golden, CO 80401<br>
******************************************************************************</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Mark E Meremonte <meremonte@usgs.gov></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">"David S. Croker" <croker@usgs.gov></font>
<tr>
<td valign=top><font size=1 color=#5f5f5f face="sans-serif">Cc:</font>
<td><font size=1 face="sans-serif">John R McMillan <mcmillan@usgs.gov>,
ANSS NetOps <anss-netops@geohazards.usgs.gov></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">04/14/2010 23:51</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [ANSS-netops] Vaults and ARRA upgrade
stations</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Sent by:</font>
<td><font size=1 face="sans-serif">anss-netops-bounces@geohazards.usgs.gov</font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=2 face="sans-serif"><br>
Hi Dave & Nathan,</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
John McMillan, Can you give them the type of epoxy we used?</font><font size=3>
<br>
</font><font size=2 face="sans-serif"><br>
The pressure gauge was used to verify the 2 psi the o-ring on the lid was
rated for and to test a seal John is working on for the cable entry.
John has a cool cable entry seal he is designing that has two plates which
sandwiches a sealant material (duct seal in our case for testing purposes;
hope to find a better material) and forces it around the cables and
up against the inside of the conduit to form a water/air tight seal.
In our test we did it without the cables, vault full of water, and pumping
2 psi into the system. Have not seen one leak yet, but
I have not been back to check since none of these 3 installations have
indicated problems to warrant a return. All have been in since mid-august
2009 and have over-wintered well thus far. Maybe the melting season
of Spring may tell differently but not yet. Keep track of the PDFs
at IRIS DMC. They will tell us if troubles crop up.</font><font size=3>
<br>
</font><font size=2 face="sans-serif"><br>
The glass base protrudes out beyond the base of the barrel and that protrusion
is utilized to help anchor/couple the vault to the concrete. So,
yes, I pour 2-4 inches above the lip on outside of the vault. Below
the vault the amount of concrete used depends o the hole. However,
we used 6 80-lbs bags of concrete: 4 in the hole, place
the vault, 2 above the lip & around the whole edge. I did not
use re-bar, if a larger diameter hole then I use re-bar.</font><font size=3>
<br>
</font><font size=2 face="sans-serif"><br>
Both this vault "remote style" (or other name which I have
not thought of yet) and the McMillan have their place. We did use
the remote style at our site at TPNV on top of the mountain at NTS where
difficult to get concrete truck up to for McMillan style.</font><font size=3>
<br>
</font><font size=2 face="sans-serif"><br>
Finally, you asked about weight of saturated soil and plus snow on top.
The Idaho sites averages 12-15 of snow according to forest service.
Because this salvage drum is smaller then the big ones for McMillan,
the sides are thinner and lid less strong even though it is ribbed as you
can see in photos. I am not worried at all about the sides because
I use sand to backfill around the vault. The sand acts as a nice
buffer between the vault and angular rocks that may be present around the
edge which may break off and eventually (or possibly) dig into the side
over time; and the sand distributes the forces around the vault evenly
giving the sides more strength; and the sand helps couple whole system
to Mother earth. Now the lid, it can depress with enough force.
So, I worried about that as well. So, I placed a strong 1 inch thick,
computer room false floor tile over it. I am still looking for something
other to replace the tile that will be strong, lightweight, and will not
deteriorate (or rot) over time. I have not found that yet and we
had lots of these unused floor tiles. </font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
Maybe I am too honest here but there you go. Welcome comments and
ideas for strengthening the lid. The salvage barrel worked out well
because it is lightweight and it comes with the o-ring. This is what
I was after in the prototype I showed at the last netops meeting. I
was against the salvage drum at first because of the thinner sidewall but
the sand has remedied that problem.</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
Hope this helps in deciding what to do on vaults. I know Memphis
has their design which I should take another look at as well. They
have all that saturated, thick Miss. muds. I think this system would
work well there too but I should would like to test it. However,
the Idaho site may do the testing for me as the snow melts and the water
has no where to go but stay on top because it does not absorb into the
granodiorite there this vault is embedded in.</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
Enough, good night!</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
Mark</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
******************************************************************************<br>
Mark E. Meremonte Geophysicist
USGS/ANSS/NEIC<br>
<br>
U.S. Geological Survey Work: 303-273-8670 Cell:
303-478-5766<br>
MS 966, Box 25046 Email:
meremonte@usgs.gov<br>
Denver, CO 80225
Web: </font><a href=http://geohazards.cr.usgs.gov/><font size=2 color=blue face="sans-serif"><u>http://geohazards.cr.usgs.gov</u></font></a><font size=2 face="sans-serif"><br>
<br>
Ship: U.S. Geological Survey, 1711 Illinois St., Golden, CO 80401<br>
******************************************************************************</font><font size=3>
<br>
<br>
</font>
<table width=100%>
<tr valign=top>
<td width=14%><font size=1 color=#5f5f5f face="sans-serif">From:</font><font size=3>
</font>
<td width=85%><font size=1 face="sans-serif">"David S. Croker"
<croker@usgs.gov></font><font size=3> </font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font><font size=3>
</font>
<td><font size=1 face="sans-serif">Mark E Meremonte <meremonte@usgs.gov></font><font size=3>
</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font><font size=3>
</font>
<td><font size=1 face="sans-serif">04/14/2010 00:03</font><font size=3>
</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font><font size=3>
</font>
<td><font size=1 face="sans-serif">Re: [ANSS-netops] Vaults and ARRA upgrade
stations</font></table>
<br><font size=3><br>
</font>
<hr noshade><font size=3><br>
<br>
<br>
Hey Mark,<br>
<br>
I'm glad you responded. You and John seem to be ahead of the curve
on vault design. I like the smaller overpack barrel size of that
version. Do you mind answering a couple of questions?<br>
<br>
1) what kind of epoxy do you use between the barrel and the glass?<br>
2) you have a picture of the pressure gauge...what sort of pressures does
it hold? Have you seen one leak yet? I would be worried about
what static pressures it could hold in the real world, like that Idaho
site. What happens when you get the weight of saturated soil and
8 feet of snow on top?<br>
3) from the one install picture, it looks like you submerge the outside
rim of the glass plate in concrete by a few inches. True? How
much concrete do you have below the glass plate?<br>
4) are you guys moving to that style only and away from the so-called McMillan
vault?<br>
<br>
Glad to hear you are on the warpath to cellular service. Let me know
if I can help further. Say hi to John for me if you see him.<br>
<br>
Cheers!<br>
Dave<br>
<br>
At 04:27 PM 4/13/2010, you wrote:<br>
</font><font size=2><br>
Nathan,</font><font size=3> </font><font size=2><br>
<br>
I cannot recall exactly what that *.ppt file showed but I think it showed
various vaults tested at ASL including a smaller style vault for, what
I called, "remote style". In any case, since then John
McMillan and I have designed a vault system with a glass base using an
off-the-shelf salvage drum that has a lid with an o-ring and using a PVC
bulkhead fitting for cable entry. This vault is similar to one I
showed at last NETOPS meeting where it was used as a table and/or chair.
See photos of our mockup at </font><a href="ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum"><font size=2 color=blue><u>ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum</u></font></a><font size=2>
and see an installation for the station PLID (Pearl Lake, ID) at </font><a href="ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum/Installed_PLID_Photos"><font size=2 color=blue><u>ftp://hazards.cr.usgs.gov/meremonte/Station-Vault/VaultDesign/Vault_SalvageDrum/Installed_PLID_Photos</u></font></a><font size=2>
.</font><font size=3> </font><font size=2><br>
<br>
As for response of the system see IRIS PDF plots for PLID at </font><a href="http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=PLID&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW"><font size=2 color=blue><u>http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=PLID&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW</u></font></a><font size=2>
. This vault is installed in the Idaho Batholith using a CMG3-ESP
and a MEMS.</font><font size=3> </font><font size=2><br>
<br>
Also, we installed the same vault and seismometers at stations FXWY and
REDW in IW network. FXWY is in an old limestone quarry and REDW is
on a couple meters of fine-grained clay soil mixed with boulders on a limestone
ridge. The PDF plots plotted for same period of time as for PLID
above are at:</font><font size=3> </font><font size=2><br>
<br>
FXWY: </font><a href="http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=FXWY&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW"><font size=2 color=blue><u>http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=FXWY&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW</u></font></a><font size=2>
<br>
REDW: </font><a href="http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=REDW&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW"><font size=2 color=blue><u>http://www.iris.washington.edu/servlet/quackquery/pdfDrill.do?station=REDW&yyyyDDD=2010.032&length=31&location=++&channel=BHZ&network=IW</u></font></a><font size=2>
<br>
<br>
Mark</font><font size=3> </font><font size=2><br>
******************************************************************************<br>
Mark E. Meremonte Geophysicist
USGS/ANSS/NEIC<br>
<br>
U.S. Geological Survey Work: 303-273-8670 Cell:
303-478-5766<br>
MS 966, Box 25046 Email:
meremonte@usgs.gov<br>
Denver, CO 80225
Web: </font><a href=http://geohazards.cr.usgs.gov/><font size=2 color=blue><u>http://geohazards.cr.usgs.gov</u></font></a><font size=2>
<br>
<br>
Ship: U.S. Geological Survey, 1711 Illinois St., Golden, CO 80401<br>
******************************************************************************</font><font size=3>
<br>
</font><font size=1 color=#5f5f5f><br>
<br>
From:</font><font size=3> </font><font size=1>Nathan L Edwards <nedwards@unr.edu></font><font size=3>
</font><font size=1 color=#5f5f5f><br>
To:</font><font size=3> </font><font size=1>"anss-netops@geohazards.usgs.gov"
<anss-netops@geohazards.usgs.gov></font><font size=3> </font><font size=1 color=#5f5f5f><br>
Date:</font><font size=3> </font><font size=1>04/13/2010 16:09</font><font size=3>
</font><font size=1 color=#5f5f5f><br>
Subject:</font><font size=3> </font><font size=1>[ANSS-netops] Vaults and
ARRA upgrade stations</font><font size=3> </font><font size=1 color=#5f5f5f><br>
Sent by:</font><font size=3> </font><font size=1>anss-netops-bounces@geohazards.usgs.gov</font><font size=3>
<br>
<br>
<br>
</font><font size=2 face="Courier New"><br>
<br>
We were wondering what other networks are doing in regards to the construction
of new vaults, broadband in particular. Maybe something along the
lines of one that Mark Meremonte covered in this presentation?</font><font size=2 color=blue face="Courier New"><u><br>
</u></font><font size=3 color=blue><u><br>
</u></font><a href=http://earthquake.usgs.gov/research/monitoring/anss/internal/ppt/vaultDesigns02.ppt><font size=2 color=blue face="Courier New"><u>http://earthquake.usgs.gov/research/monitoring/anss/internal/ppt/vaultDesigns02.ppt</u></font></a><font size=2 face="Courier New">
<br>
<br>
<br>
<br>
Nathan Edwards<br>
Development Technician<br>
Nevada Seismological Laboratory<br>
University of Nevada Reno<br>
Reno, NV 89557-0174<br>
o: 775-784-1106<br>
m: 775-303-5899<br>
f: 775-784-4165<br>
_______________________________________________<br>
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ANSS-netops@geohazards.usgs.gov</font><font size=3 color=blue><u><br>
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<br>
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ANSS-netops@geohazards.usgs.gov</font><font size=3 color=blue><u><br>
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</font></tt><a href="https://geohazards.usgs.gov/mailman/listinfo/anss-netops"><tt><font size=2>https://geohazards.usgs.gov/mailman/listinfo/anss-netops</font></tt></a><tt><font size=2><br>
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