heidi, i would think twice about what you are doing. i'm not so sure the mud would be a wise choice for the dam, unles you use it for the back side of the dam, and eventually it will dry out and you can "reshape it" or bull doze it. as far as "being sure not to seal off any springs", this has been a topic several times. if you have a weak spring in the deep part of the pond, you make create "reverse flow" and lose water rather than capture the spring water which i think you may be trying to accomplish. you might want to look up this topic. good luck. ilovefishingmark
