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Making bumps with grooming machines?

post #1 of 11
Thread Starter 
I've read (not seen) that several larger areas are grooming round bumps into intermediate terrain where bumps wouldn't normally form. This would allow more timid skiers an introduction to mogul skiing without the steep. If nothing else, it would add variety to the skiing experience. I am hoping someone can tell me precisely how they do this- I have our "slope supervisor" and cat-operator's wanting to know.

I get the dig-lift-dig-lift part with the blade, but how do the bumps end up staggered, and if they are GROOMED with an offset, wouldn't each bump need to be a cat-track wide?

Anyone seen this or had experience?

post #2 of 11
Machine-made bumps have been around for several years. Used for setting up bumps in competitions and practice slopes. I've not heard of them being used to create bumps on an open run, but I suppose it's possible. The device that forms the bumps is not the standard tiller on a groomer, but rather is a task-specific piece of equipment like the pipe dragon used to make half/quarter pipes.
post #3 of 11
I can't comment on your machine bumps except to say it sounds ridiculous to me that the powers that be think that is the only way moguls would occur on moderate pitched slopes.

Long ago before the age of massive grooming we have today, there were often moderate pitched runs which had small bumps. Then gradually those runs ended up a victim of indiscriminate grooming on all runs that are not steep. For years I have been complaining about this. Why can't resorts just leave one or two moderate pitched runs alone and NEVER groom them. Typically they may groom some runs infrequently like say every week or two but even that is too much, particularly for these lower gradient slopes. I cannot speak for the way bumps might form in typical eastern conditions but in the more dry cold snow conditions in the west, nice little bumps can form perfect for novice bump skiers to practice on. Grooming occasionally in firmer bump runs tends to make low gradient bumps with long flat hard to edge slabs, ending with mounds of loose snow. They suck...never groom and they will turn out just fine given time. -dave
post #4 of 11
If you see the bumps at the Olympics, I'm almost positive they will have been 'man-made'. They've done it like that since Lillehammer for the Olympics (and some other, but not all, WC comps).
But, from the 'manufactured' courses that I've seen, I don't think it would be smart to use as a general rule (as a matter of fact, I question the need to do it at all). The bumps I've seen are at first nearly unskiable mounds of snow, that only start to resemble a bump course after several sets of competitors literally round the edges.
post #5 of 11
Making bumps (one zipperline) with machine:

Snow is piled up into piles of machine width with spacing of 8-12 meters (9-11 yards) (- is one bump),




then half of each pile is shifted into middle of two piles (starting from the bottom). Then the snow is spread with shovels more evenly to shape bumps and then skied for final shape.


I don't see much other way to do the wider fields but to make zipperlines one by one next to each other. Correct me if I'm wrong.


<FONT COLOR="#800080" SIZE="1">[ January 14, 2002 06:00 AM: Message edited 1 time, by JK ]</font>
post #6 of 11
Yup, we create man made bumps on blue terrain(by western standards) at our ski hill. At first they are hard to ski, as they are just piles of snow cookies but within a day, they are fine. Brandywine Ski Resort, Pennisula Ohio.
post #7 of 11
post #8 of 11
I agree with Dave SSSS.
post #9 of 11
Why has nobody brought up the use of snowboarders.
All you have to do is get them to sit down on the slopes, and let it snow.
Once enough snow has built up on the first row of seated boarders, the next ones will just scrape over the top of them and sit about 2 yards down the slope, due to the steepness of the drop from the first ones. After a couple of days, you end up with a bump run that has been made perfect by snowboarders. Who says they're useless?

Sarcasm over, one of the things I really enjoy about Winter Park is how they don't piste bash many runs, so after a good dump of snow, the people using the slopes make the moguls. The way nature intended.

post #10 of 11
Fox, that is great.
post #11 of 11
They make the bumbs at my local hill as there are not enough good skiers for them to form well naturally. Infact, they opened a new "double black" last year which was to remain ungroomed and the bumbs that formed were so irregular and spaced it was sad.

Anyway, from what I'v seen they make them with a small snowcat, pile them offset in small pyrimids, and them attempt to groom them flat. What happens it that they are smoothed into a lumpy pattern, and skiers them creat the zipper line through them. They are open to the public at our hill, but very few people can ski them well!
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