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Best Machine For This?

 
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Old 03-02-2019, 02:14 PM   #1
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Best Machine For This?


This isnt exactly my question. My kids school is doing a playground with volunteer help etc. we have to excavate around 100 yards of material (clean fill with grass on top) down about 16. I have someone with a Kubota mini ex (kx121) who is willing to do it. Im just wondering if it is feasible to try and do this with a machine that size. Its supposed to happen near them end of March. We havent had a lot of frost so Im not worried about that. But is a machine with a 2 bucket going to be able to load that out in 2 days? Thanks, Nick.
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Old 03-02-2019, 02:32 PM   #2
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Re: Best Machine For This?


Do you have access for bigger equipment? If you do I would go larger. I did an addition with a similar size machine(just walls 4ft down 24wide) approximately 15 yards and it was a day digging with a skid loading it out.

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Old 03-02-2019, 02:48 PM   #3
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Re: Best Machine For This?


I have almost no excavation experience, but I like to puzzle out the math on stuff like this.

How many full loads is that? 16 or so?
Will dump trucks be constantly available?
How many minutes to load one of them?

That sounds like a tall order for two days by any stretch.

Ok pros..am I figuring this right?
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Old 03-02-2019, 03:35 PM   #4
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Re: Best Machine For This?


Were hoping to load directly into dump trucks. And yeah, were shooting to have a couple dumps (6 wheelers) and maybe a dump trailer.
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Old 03-02-2019, 03:40 PM   #5
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Re: Best Machine For This?


I'd get a bigger machine, at least a full size backhoe or equivalent size track hoe / mini.
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Old 03-02-2019, 04:20 PM   #6
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Re: Best Machine For This?


in a similar situation, it took a 580 hoe & a front end loader to excavate that size area and haul spoils. took more digging with the hoe than we hoped for.

machine operators were pros.
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Old 03-02-2019, 04:39 PM   #7
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Re: Best Machine For This?


I would agree that a larger machine would be helpful, but not mandatory. You can get by with what you have, but will be tough to get done in 2 days.

I would tag team that with a decent skid loader and mini ex.

Unless the trucks have a very short haul your issue will be waiting for the trucks to get back.

I am assuming these 6 wheelers are contractor dump sized trucks, and not big body 8/9 yard dump trucks.
If you were running big tri axle dumps you'd be looking at about 10 loads. A big 6 wheel dump 20+ loads, contractor dump probably 40+ loads.
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Old 03-02-2019, 10:01 PM   #8
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Re: Best Machine For This?


I believe the trucks will have sides that are on the high end. Maybe even a tri-axle thrown in the mix. I talked to my BIL whos a machine operator. He said loading high sides with a machine that size would be tough. Wed be better off stockpiling the fill and then putting the machine on top of it to load trucks. If we do that I think we are looking at more like 3-4 days easy. Im going to talk to my excavation guys and see what they can come up with for a price. $$$ is always an issue with volunteer projects. But Id rather have someone who can get it done and do it right regardless of conditions.
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Old 03-02-2019, 10:28 PM   #9
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Re: Best Machine For This?


100 yards, 16 inches deep? Get a tracked skiddy

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Old 03-03-2019, 08:56 AM   #10
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Re: Best Machine For This?


Don't have access to one of these? You'd be done by lunch on day 1

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Old 03-03-2019, 09:03 AM   #11
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Re: Best Machine For This?


Your BIL is right as far as loading tri axle dumps with that size mini ex.
A ramp/dirt platform to load from would make it faster, combine that with cutting a ramp to back the trucks down into and it can make it better to load. But at some point you have to load out the stockpile you're working from.
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Old 03-03-2019, 08:11 PM   #12
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Re: Best Machine For This?


Depending on weather this could be a wet site. Thats why Im leaning away from a skid loader or even track loader. Theyd have to be down in it to make the cut and the ex could stay up on top.
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Old 03-04-2019, 01:20 AM   #13
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Re: Best Machine For This?


what are you installing?

substrate for rubber tile fall zone?
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Old 03-04-2019, 05:53 AM   #14
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Re: Best Machine For This?


Playground. Fabric, stone, fabric, wood fiber. Cant afford the good stuff
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Old 03-05-2019, 08:16 AM   #15
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Re: Best Machine For This?


Since it's a volunteer job, the free machine is the best machine. Let the guy do the digging. It will be a little slow loading, but it's a charity job, so sometimes you have to go with the crowd.
A good operator makes a difference.

If you are using true 6x6 trucks, it might be hard to get over the sides. When you said a dump trailer and a couple 6x6, I assumed you meant a basic dump trailer that alot of construction guys have and 2 - side by sides with 6 tires and a dump bed. Since it's a volunteer project, I thought you might be getting some homeowners with that, and they think their dump beds are really handy.
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Old 03-05-2019, 07:40 PM   #16
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Re: Best Machine For This?


I’ve got a CAT 303.5e cr mini ex, a CAT 289D, and a 25,950 GVW freightliner dump. Even with a man in each piece of equipment, I can’t see it happening in two days. I agree with tgeb in that it depends how long it takes for the truck to dump and return. Filling the truck should be relatively quick.
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Old 03-05-2019, 08:22 PM   #17
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Re: Best Machine For This?


Dig with skiddy, haul away spoils as dug. Have truck bring back aggregate back on return trip.

While waiting for truck, lay some fabric down, only a buck a square yard. Knock down and compact material if you gotta wait for trucks.

Two trucks, one skiddy. ...10 hours tops. Only talking 100 yards.

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Old 03-05-2019, 08:29 PM   #18
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Re: Best Machine For This?


Quote:
Originally Posted by Morning Wood View Post
Playground. Fabric, stone, fabric, wood fiber. Cant afford the good stuff
i used to have to put 12" of engineered wood fiber in playgrounds.

trucking cost as much as the chips....
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Old 03-06-2019, 07:11 AM   #19
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Re: Best Machine For This?


Do what they did where I live, they went to a local rental place and asked if they would like to donate the rental of a machine and they would put the business banner on the site for 3 months. They got 2 machines.
Luckily there are many Union machine operators to run them almost nonstop until they were done
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Old 03-06-2019, 05:51 PM   #20
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Re: Best Machine For This?


100 yards with a 4-5 ton mini and a tracked skid steer is quite doable. We use that exact setup and pretty routinely do 80-100 yards in a day provided access for trucks is good.

Mini ex will sit and dig, and then we'll use our tracked skid steer with a high dump bucket to load trucks. Loads about 1 yard at a time. Like others have said, trucking will be your biggest bottleneck. It usually is for us. I'm lucky to get 5 trips out of a single tri-axle in a day just due to traffic and dump site locations.

Should be able to do it in 2 days pretty easy with a pair of decent operators.

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Last edited by NGCExcavation; 03-06-2019 at 06:06 PM.
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