Glen,
Here is what worked for me on my new dam that was just about to literally erode away...I unrolled a few round bales of hay on the exposed portions of the dam. Not only did it stop the erosion cold for the winter, but the next spring the bahia grass seeded and provided permanent control...no more erosion. If you can find last years hay, it is very inexpensive, but it does help to have a tractor to move the large round bales around where you need them.
