dirtworksequip said:
swines, I take it that an arroyo is a rocky or sandy wash that has no water in it until it rains? What is the reason that you need to rework this wash? What is the approximate size and depth of the arroyo? What slope will you end up from the top to the bottom after you cut and fill?
It seems to me that the main purpose of the 3 foot bucket is to move the Yuccas and maybe place some rip rap. A 3 foot bucket is not always going to be faster. Yes, it will hold more material but it will also lift,swing and dig slower. What you are gaining in volume you may be loosing in speed. Also take into consideration if you are wanting to place rip rap with the hoe.......how will the hoe handle a full bucket of rip rap if you are sitting on a slope. You may only be able to safely load the bucket half way as to not cause a tipping condition. You just lost all what you thought you were gaining with the 3 foot bucket, because now you can only effectively use half its volume. You may actually be able to get more stone in a 2 foot bucket because of difference in the weight of the 2 for verses the 3 foot bucket. A 3 foot bucket is a lot of bucket hanging out on the end of a CUT's backhoe attachment.
Again, just my thoughts on bucket choice. You have to make final choice of what you think will best serve your needs.
Sincerely, Dirt
The wash is dry until it rains, and pure sandy/loam - no rocks. It's at the bottom of a long hill (800 feet) with about a 70 foot elevation change from the top of the hill to the bottom in a north to south direction. The land contours also feed additional water into the arroyo from east and west - it's basically the low drainage point from a ridge line into a larger wash.
Left in its current condition, the arroyo will continue to cut it's way back up the hill with large rains unless it's contained. It's currently about 120-feet long, by 15-feet wide, by about 5-feet in depth.
I plan on cutting the banks back at about a 4:1 slope and filling the arroyo with the material, ending up with a depth of about 3.5 - 4 feet. The banks will be covered with about 1-foot of rip rap (2x the largest size rock) and the bottom with about 2 feet of rip rap (4x the largest size rock) - making a final depth of about 2-3 feet. The rip rap will be extended past the bank edges by 3-4 feet and tapered from the 1-foot depth to ground level to slow the water as it enters the arroyo.
As you've pointed out (and that's what I'm trying to figure out) is what is the optimum bucket size for the job? Yes, I will have to place the rip rap into the center of the arroyo - but, I will probably have to do that with the loader using a rock bucket as I don't think the backhoe can reach to the center - even working from both sides.
I think in placing the rip rap, the backhoe will be most useful in filling in from the bottom of the slope to the middle of the slope - using the loader/rock bucket to fill the remainder from the middle to the top of the slope. This will negate the need to drive on top of the geotextile material that will be placed on the slopes, as I don't want to damage it.
I also think the backhoe will need to be used to do the preliminary bank profiling before working them with the bucket for the final slope - and, as you've pointed out - "A 3 foot bucket is a lot of bucket hanging out on the end of a CUT's backhoe attachment."
And exactly why I've asked the question - to gain some insight from people who have used the equipment.