how wide and deep are you making the swales?
i was able to use a rototiller to loosen up the dirt, then i went back and shoveled the loose dirt downhill.
took a few passes, but it was easier than just a shovel.
i only did 1
swale at ~125 ft. it took an afternoon.
i do plan to rent rent a digger next time, but that is mainly to dig a
pond, which isnt fun via shovel. i will also use it for swales.
good luck and post pictures
http://www.cloud9farms.com/ - Southern Colorado - Zone 5 (-19*f) - 5300ft elevation - 12in rainfall plus irrigation rights
Dairy cows, "hair" sheep, Kune Kune pigs, chickens, guineas and turkeys