Leveling part of a hill iwith a 25% Slope- see atttachments

[Egon]

Best be getting it designed by an Engineer. The slope stability is critical, both on the cut side slope and the fill side slope.

Cuts of this type will usually be started from the very top with dozers. The dirt is pushed over the side as the side slope is cut And gradually forms a flat area that gets wider as the cut gets deeper.

Forget the D2 or D4. Start at a D9 or bigger. Well maybe smaller with an angle blade to initiate the cut. The dozer works on a flat area and pushes the dirt over the downhill side. The flat area will slowly get wider as the cut depth increases. If a dozer does go over the side drop the blade, try to get facing straight down hill and make sure your seat belt is fastened. A dozer with winch may pull you out and up if the dozer is just tilted over on a soft edge.

Also consider road access.

 

[LouNY]

How far down to bed rock,
is that hill a rock upthurst.
Depending on the soil conditions it might be decent to do with a grader,
or it could require drilling and blasting.
Too many unknowns to make a judgement call.
Also if you are in an area that is so regulated that an engineer and engineered plans are required your cost just went thru the roof.

 

[Egon]

Also if you are in an area that is so regulated that an engineer and engineered plans are required your cost just went thru the roof.

The costs may also be significant if all slides down into the river.

 

[CADplans]

That much dirt moving should easily cost over $100,000,, and is WAY more than a week,,

You will be using drills, and explosives,, just to loosen the material, even if you do not hit bedrock.

I removed 4 feet of dirt off 1.5 acres (about what area you are talking about) with a TD9 IH dozer,,
that took an entire summer,, (back in the 1970s)
We were moving only clay, no sand, no rock.

Yea, I used an old dozer,, but, you want to move an awful lot MORE material than 4 feet,,,

 

[Mat4644]

If you level a 500 foot section the transition section will be steeper than before and an erosion and slide risk. You need at least professional planning to determine what is safe and LEGAL.

 

[Diggin It]

is that hill a rock upthurst.

Somebody finally got there. OP might only find a few feet of dirt that can be moved.

 

[Ocean2026]

Thanks The Washington Department of Natural Resources has a small landowner program and they are supposed to provide assistance. The Alder Trees grow so fast up there and really can only be knocked off in July and August otherwise they grow back rapidly.

I dont think moving some earth down the hill a few hundred feet would cause a landslide and the vegetation cover is thick but will check. The earth is soft.

I still don't know whether a backhoe or a bulldozer would be best.

 

[Diggin It]

I still don't know whether a backhoe or a bulldozer would be best.

You don't seem to be understanding the scale and scope of this task. A fleet of specialized earth moving machinery with a skilled crew 'would be best'. You don't move mountains with a backhoe.

 

[Citydude]

The yardage you are contemplating moving and your question of how not to roll a dozer says hire a pro.

For reference, a D10r dozer will move 400 yards of loose material an hour by slot dozing. For further reference say the dozer cut a 20 foot deep slot the width of the dozer, and pushed it 160 feet. That’s only 2400 yards. I used to operate dozers in a mining environment.

Your going to need a bigger boat.....

 

[RickB]

You don't seem to be understanding the scale and scope of this task.

Exactly. Or the potential ramifications thereof.