This nearly 2 year old thread may be a good place for me to suggest that we could come up with ideas about picking up MEGA-loads of material for composting.
I do like many and visit places with fall leaves - in my case, pine needles. One is a hillside above one of my gardens. One is a city park - there, it is just hurry out there with a rake before the city gets there with it's sweeper. Might be illegal but no one has ever suggested that I shouldn't be doing it. The hillside, I have to send DW up there because of the steepness. The pine trees barely cling to it and it is almost nothing but basalt rocks. Still, the pine needles can pile up and just need a little raking to bring them down hill to the back of my truck.
Oh yeah, you need a truck - so, this is about getting a truckload of compostables.
I like pine needles, they make very good mulch and very good compost. Clean, too! Many gardeners want the "real deal" and another place where I've hauled off MEGA-loads was at a livestock feeding operation. It was about this time of year and the cattle were just about ready to be returned to pastures - leaving behind . . . well, a real mess.
If you do this, be polite. Show up when the workers are out there and ask - maybe not about going into the corrals but, that "pile of spoiled hay" . . . There's always feed that didn't get used or that was cleaned out of the way - often with a good load of manure in it. I mean, the stuff is on its way to composting. The operation may have little interest in the material and just see it as a burden to haul off. Manure spreaders don't work real well with hay.
How do you find these places? Use your nose. Okay, you can use your eyes also - lots of cattle, for example. I used to work for a farm that turned into something of a livestock operation. The guy used to be something of a friend but I'm embarrassed in how he has "disposed" of the material from his feed lots. Yeah sure, he has returned it to some of his fields -- problem is that he made no attempt to spread it, and no attempt to turn it! It has been out there for years in GREAT piles - and, I mean there are dozens of them - scattered about 15 or 20 acres!
His family also owns a grain elevator off a railroad siding. I have asked him about the spilled grain. It was spoiled from laying there over the winter and must have been several pickup loads. He said, "Sure, take it!" But, I didn't. I'm not quite sure about using grain for composting. If I wasn't concerned about embarrassing him, I would ask about the hills of hay and manure that he must be leaving for his kids to deal with - sometime later this century.
Steve