rusleepy, I sure am sleepy myself *LOL* Joke aside, how far are you planning to burn your debris, and how much in volume? A rule of thumb of ash is:

1 part ash to 1 part water = 0.7pH
* Heavily depending how much had been burn, and from which mixture of plants' species and where they grow. The pH can go either toward alkalinic or acidic. However, pH doesn't drop more than 5.5 or 10.5, no matter how much ash to shove it there after.

We heavily verified three water body due to the 2003-2004 Grand Prix fires. Man, that was a nightmare. Then fire starters try to mimic that again in 2006-2007. Failed to set things heavily ablaze, but still managed to get some major damages in.

That being said, LMB can be effected slightly due to the pH. Not sure other forage fish that you have. I'm more concern about the total suspended solids and total dissolved solids. That will destroy your existing dissolved oxygen and irritate the fish gills to the point of improper oxygen absorption. That will be their death if too much ash is introduced to the water as part of the new rain run-off. Suggestion for you would be mixing the dirt with the ash on the higher banks of the pond, away from the primary drainage areas that run into the pond. The ash will encourage microbial and plants' growth within 8 months before large amount of rain wash the water into the pond.


Leo

* Knowledge and experience yield wisdom. Sharing wisdom expand the generations with crucial knowledge. Unshared wisdom is worth nothing more than rotting manure.