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dieselbur...@gmail.com  
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  More options Apr 6, 7:51 am
Newsgroups: sci.geo.hydrology
From: dieselbur...@gmail.com
Date: Sun, 6 Apr 2008 04:51:39 -0700 (PDT)
Local: Sun, Apr 6 2008 7:51 am
Subject: Well Development
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Hello, I have a residence with a deep water well. This well is exactly
200' deep and water is at around the 175' level. The pump is located
about 4' off of the bottom with approximately 20' of water above it.
The well is 12" inside diameter steel cased. I checked with the county
and they do not have any record of the well so it is probably 40 years
old or more. This well produces anywhere from 1 gpm to 7 gpm and the
rate does not seem to matter if we are having a wet or dry season. I
am curious if there is any consensus from people on this newsgroup if
I should try to improve this well or have another one put in.
Currently, the production is adequate, but just barely. The well is
located in the hills in central California. Thanks for suggestions.

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Jean  
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  More options Apr 5, 8:53 am
Newsgroups: sci.geo.hydrology
From: "Jean" <jean.len...@wanadoo.fr>
Date: Sat, 5 Apr 2008 14:53:35 +0200
Local: Sat, Apr 5 2008 8:53 am
Subject: Re: Well Development
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dieselbur...@gmail.com a écrit dans le message
<993ed9da-889e-41e4-aa15-e8f461f2b...@l28g2000prd.googlegroups.com>...

>Hello, I have a residence with a deep water well. This well is exactly
>200' deep and water is at around the 175' level. The pump is located
>about 4' off of the bottom with approximately 20' of water above it.
>The well is 12" inside diameter steel cased. I checked with the county
>and they do not have any record of the well so it is probably 40 years
>old or more. This well produces anywhere from 1 gpm to 7 gpm and the
>rate does not seem to matter if we are having a wet or dry season. I
>am curious if there is any consensus from people on this newsgroup if
>I should try to improve this well or have another one put in.
>Currently, the production is adequate, but just barely. The well is
>located in the hills in central California. Thanks for suggestions.

  In most cases it is better to maintain the existing well.  There is the
cost of a new well to consider and in California there may be a problem
getting a new well permit.  I don't know what you mean when you say
"well produces anywhere from 1 gpm to 7 gpm "!  Does that mean that
is all that the pump will put out or that the well pumps dry quickly?   If
it pumps dry quickly then that could mean either the well screen is clogged
or the aquifer is damaged.  More likely a clogged screen.

  JL


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Jo Schaper  
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  More options Apr 5, 1:54 pm
Newsgroups: sci.geo.hydrology
From: Jo Schaper <jo345sch765a...@s9ocket.net>
Date: Sat, 05 Apr 2008 11:54:13 -0600
Local: Sat, Apr 5 2008 1:54 pm
Subject: Re: Well Development
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dieselbur...@gmail.com wrote:
> Hello, I have a residence with a deep water well. This well is exactly
> 200' deep and water is at around the 175' level. The pump is located
> about 4' off of the bottom with approximately 20' of water above it.
> The well is 12" inside diameter steel cased. I checked with the county
> and they do not have any record of the well so it is probably 40 years
> old or more. This well produces anywhere from 1 gpm to 7 gpm and the
> rate does not seem to matter if we are having a wet or dry season. I
> am curious if there is any consensus from people on this newsgroup if
> I should try to improve this well or have another one put in.
> Currently, the production is adequate, but just barely. The well is
> located in the hills in central California. Thanks for suggestions.

200 ft isn't that deep for a residential water well these days, (in
terms of surface contamination) and that yield is rather low for modern
appliances -- even a low-flow toilet takes 1.6 gallons to flush.

Look at http://www.groundwater.water.ca.gov/technical_assistance/gw_wells/
and talk with someone from your local water district office -- they may
be able to assist you from a position of more knowledge about your
circumstances.

Beyond that, your best bet is leave your checkbook at home, but make
appointments to talk with a local well driller or two and ask for their
professional opinions based on your local geology, hydrology and cost
alternatives.


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