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08-01-2007, 06:10 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
USDA Zone 4
Posts: 7,448
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Grading on a septic mound
What's acceptable in terms of machinery size to put on a septic mound to do some grading? The client has 3' high weeds, so we need to use something, but I don't want to damage the mound.
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08-01-2007, 08:05 PM
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Gold Oak Member
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Join Date: Oct 2003
USDA Zone 6
Posts: 450
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We've run our mtl and skid steer over a few septics without problems. I wouldn't do it right after a rain though.
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08-01-2007, 09:10 PM
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Gold Oak Member
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Join Date: Feb 2003
Location: Cape Cod
USDA Zone 6
Posts: 1,280
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You really have to know how it is designed, but I don't know of any system that can not handle a ride on mower. The structural components are usually rated as "h10" for lighter loads or "h20" which can handle a big truck going over it.
Each state has diffeent rules, so you might do well to talk to an engineer or health inspector to find out about the general ways these are designed in your area.
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08-01-2007, 09:39 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
USDA Zone 4
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Yeah, we'll need more than a ride-on mower - we're renting a dozer for this grading job, followed by our skid steer for fine grading.
I'll see if I can get the name of the company that built the mound and give them a jingle.
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08-03-2007, 12:02 AM
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B&B Tree
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Join Date: Mar 2003
Location: LaGrangeville, N.Y.
USDA Zone 5
Posts: 856
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That's your best bet, to get the design of the system. You shouldn't have any problem with the dozer, but the skid steer could cause damage if the system is very shallow. I've broken a lid with mine on a tank that was just a few inches deep.
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08-03-2007, 07:13 AM
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Whip
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Join Date: Feb 2004
USDA
Posts: 302
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Man, I can see this thread going right in the crapper.  |
08-08-2007, 08:07 PM
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Seedling
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Join Date: May 2005
USDA Zone 5
Posts: 71
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I had a septic system put in a few years ago and the contractor was driving what I think was the biggest Bobcat track loader all over it right to the finish. Ground pressure per square inch is probably more of a factor than the overall weight of the machine.
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Nothing can ever be made foolproof, because fools are so ingenious.
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08-08-2007, 09:04 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
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The homeowner is tracking down the company that made this mound, so I should be able to find out in pretty short order.
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08-08-2007, 10:18 PM
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B&B Tree
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Join Date: Oct 2003
USDA
Posts: 805
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08-09-2007, 06:45 AM
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Whip
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Join Date: Feb 2004
USDA
Posts: 302
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Dale, SHUT UP! 
(In a nice, respectful of my elders tone)  |
08-26-2007, 04:38 PM
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Acorn
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Join Date: Oct 2006
USDA
Posts: 14
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How about a Bobcat T 190 or similar track machine?
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08-26-2007, 05:34 PM
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Administrator
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Join Date: Jan 2003
Location: Wisconsin
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Hmm.... I'm getting the impression you sell Bobcat T190's....
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08-26-2007, 06:55 PM
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Seedling
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Join Date: Jan 2006
USDA
Posts: 146
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Some time ago we operated our 3 tonne Yanmar mini-ex on a neighbours paving to build a wall (they consented) and the paving really broke up. I am back there now building granite and limestone walls, and also taking out the paving for a new install. Whilst the neighbour (now my client) understood the risk of letting us operate on the paving (and wanted it replaced anyway) it was difficult to understand why the paving sunk and broke up so bad.
Well all was revealed when we pulled out the paving.....a redundant septic field that had never been decommissioned properly after the house was connected to the sewer main. All the leach drain lids where cracked allowing the paving to sag. My Yanmar is specced at about 3.1 Psi ground pressure. I have run it over heaps of other septic systems and never had a problem. I have a feeling the septic cyctem may have been collapsing before we started.
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10-26-2007, 12:18 AM
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Acorn
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Join Date: Sep 2007
Location: Northeast PA
USDA Zone 6
Posts: 17
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Stonehenge, how'd this end up?
I'm curious - when I was studying up on them after becoming the proud owner of a brand new septic mound, I learned you're not even supposed to walk on them, if you can help it, and you should mow as infrequently as possible.
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10-27-2007, 01:09 PM
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Acorn
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Join Date: Oct 2006
USDA
Posts: 14
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Quote:
Originally posted by Stonehenge
Hmm.... I'm getting the impression you sell Bobcat T190's....
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No, I don't sell the machines....I have just used them many times and mentioned it thinking that the lower psi might be a better alternative....not trying to sell anything here....just a thought
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