Bill: Maybe I prematurely eliminated the possibility of excessive fertility as a causal agent for BOD-spikes, but I rarely encounter relatively "new" lakes (dammed in '99) that suffer from eutrophication symptoms.
I also assumed that the lake's max and avg depths would limit the likelihood that excessive weed-growth (and subsequent decomposition) was an issue.
I guess we should ask LMack how the lake receives its water: presumably an extensive water-shed; and if so, what occupies the watershed that might contribute to rapid nutrient-loading.
