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RE: Building Settlement - Las Vegas

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There is actually recorded data regarding settlement throughout the Las
Vegas area as a result of ground water depletion.  This includes USGS
reports.

Over some areas the settlement over the past 20 years can be measured in
feet.

I would start there.

Paul Feather PE, SE
pfeather(--nospam--at)SE-Solutions.net
www.SE-Solutions.net
 
-----Original Message-----
From: Conley, Robert J SPL [mailto:Robert.J.Conley(--nospam--at)spl01.usace.army.mil]

Sent: Friday, October 06, 2006 4:27 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: Building Settlement - Las Vegas



-----Original Message-----
From: Polhemus, Bill [mailto:BPolhemus(--nospam--at)wje.com] 
Sent: Thursday, May 04, 2006 8:58 AM
To: Seaint(--nospam--at)seaint.org
Subject: Building Settlement - Las Vegas

Comments?

William L. Polhemus, Jr. P.E.
Wiss, Janney, Elstner Associates Inc.
Houston, Texas
P: 832.467.2177
M: 281.450.8426

-----Original Message-----

We are investigating settlement of a building in Las Vegas.  The
buildings
that have settled are on the order of 40 years old - the settlement is
reportedly a relatively recent phenomenon - starting within the last
five or
six years.  A new building was constructed adjacent to the older
buildings,
however, the construction was only a couple of years ago, after the
settlement had already started. 
  
The settlement is significant - in some locations on the order of 6 or
more
inches.   
  
Two recent geotech studies identify gypsum in the soils and note that
the
gypsum can go into suspension if water is present.   
  
Anyone have any experience with something similar? 

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