Developing a spring with pigs?

So we've got an area on our property where it looks like someone went in with a backhoe and dug around trying to develop a weep into a watering area for livestock.  What we have now is a slight depression and a pugged up weep from cattle getting in there.  Enough moisture is retained in the area that frogs will come in a lay eggs in the hoof impressions and they'll continue on with their life cycle from there.  My idea/question is to pen pigs up in that area, let them root it up and wallow it out to make the area into more of a bowl that will seal up and hold the moisture in a pool.  The hope is that in the future I can then draw water from the pool into a trough for watering livestock and feeding into a creek further down the slope.  Do you guys think this will be a viable endeavor or am I just going to be wasting my time and making things worse?  

It seems to me that unless you know for certain they are trampling downstream of the weep, they may effectively seal it off so that it springs out some other place entirely.

On my farm I try to fence my animals out of watery locations so as to preserve the watershed and aquifer. That does not mean the water cannot be used for livestock, but rather just keep them from slogging through it.

Obviously I do not know much about your place, but a great way to "develop a spring", is to use cheap drain tile and try and capture the water upstream and channel it down to the lowest point in the weep spot where the old backhoe dug. Fan the drain tile out as much as possible so it gathers from as big a wet area as possible into one collection point. I'll call this a sump. You can buy concrete tiles 4 feet in diameter purpose made for this, use a plastic 55 gallon drum, or if plastic and concrete is not to your liking; a circle of stones to hold back the soil as you make your own sump. Dig it as deep as you want to go down, put a gravel base in and you should have clean water pulled from a broad area.

From that sump you can either install a hand pump, a solar pump, or if close enough to electricity, a electric pump and pump the collected water to stocktank to water livestock. This will keep the area from being contaminated by livestock manure, and keep it from going downstream to your neighbors.