May have to trench a line, I know that there is a gas line for the grill, a
120v line and waterlines running to a pool house, sprinkler lines and maybe
some water lines going to the pool.
all of this is on the customer side of the utilities
What would you guys suggest to find these lines ?
I was thinking a metal detector but I don't know how accurate that would be.
Here we call it Blue stake. It is a free service for locating utilities
before you dig.
Here if you dig and hit something with out Blue Stake your liable for the
repair and any damages.
Look up locating services in the phone book
A metal detector would be the last thing I would try.
There is in most US states a service that comes in to locate and mark
buried utility lines. Not calling them first is a violation of the law here
in Massachusetts. Also go look for plans for the place. They often will
leave a plan with buried lines indicated on it. They also may have filed
the plan with the local building inspectors office.
Failing all of that, I'd suggest hiring a local contractor who has the
specialized gear to trace and locate buried lines. It's not all that hard,
if you have the right tools and the soil is not too conductive.
Not a metal detector. The usual way is to apply a radio frequency
signal to one end of the line you are looking for and then search
for it with a directional antenna, often in the form of a square
coil in the lid of the box containing the RF generator/Receiver. By
moving away from the line of the pipe and angling the antenna 45 deg
to vertical, you can also tell how deep the buried pipe is. Plastic
gas lines now always have a wire buried with them (spiraled around
the pipe) with one end exposed by the gas meter. Copper water lines
are easy if they appear up through the floor somewhere. Buried
power cables can also have the RF imposed on them if you can stand
the RF generator close to the cable above ground - even below ground
if you know where part of it is.
040817 0043 - Checkmate posted:
No, willow branches are for finding water. I use a couple of coat hangers
for finding buried lines. Cut a couple of coat hangers so that you have a
straight piece about 10 " long and bend a sharp 90 degree so that you have
another straight piece about 6". Hold one in each hand, with your hands
about 12" apart, with the 10" part straight forward, and so that each can
move easily one way or the other. Don't hold them tight. Now begin walking
forward slowly along the path that you are going to dig your trench. As you
move forward, and you cross a place where there is a buried line running
across where you are going to dig, the coat hangers will cross. Go back and
forth over this area a couple of times to determine where the crossing is
the strongest and then stick a screwdriver into the ground there, or bright
orange spray paint, or whatever, and then continue on until you have reached
the end of your dig. When you use your trencher, and reach a point that is
marked, stop the trencher about a foot either side of the mark and then
continue on with the trench. Then go back with a shovel and break out the
section that was left intact until you find what was indicated. If there is
nothing there, it is possible that what was indicated was deeper into the
earth than what you are digging.
Boy, could I tell you stories about this...
It would be best to try this method out first on a known underground, where
you know that there is something buried in the ground, and then cross it and
see if this method works for you. Some people can't make it work. Others
feel a very strong pull in the hangers. I am of the latter. I can find
empty plastic conduits, water lines, tree roots, metal conduit, and even
lines buried in a concrete floor.
I can verify that this works. Many years ago, I was working for
an irrigation company and we hired a backhoe to do a little
trenching in the same proximity of some Minute-Man Missle cables.
Cutting into one of those brings out the Air Force followed by a
stiff fine. I used the #6 copper wire method and located the
missle cable. But not being totally void of common sense, we
called the local phone co-op that was under contract to locate the
missle cables in cases like this. They located the cables right
where the #6 wire method said they were.
| I can verify that this works. Many years ago, I was working for
| an irrigation company and we hired a backhoe to do a little
| trenching in the same proximity of some Minute-Man Missle cables.
| Cutting into one of those brings out the Air Force followed by a
| stiff fine. I used the #6 copper wire method and located the
| missle cable. But not being totally void of common sense, we
| called the local phone co-op that was under contract to locate the
| missle cables in cases like this. They located the cables right
| where the #6 wire method said they were.
How about some pictures to get an accurate idea of how this is done.