I like all of these - but I wanted more of an abstract logo - not one that plays off of the letters H and A.
Regarding entry 8 - I like the tree concept, but I am not an environmental firm, so that is too much like a plant or shrub - However, Huron is a lake - so if there is someway to make the abstract image more of a body of water - that would be interesting.
Could you take the green ball out from entry #62, so there is only a blue ball? Also, after you do that, perhaps you could make the H part entirely blue and then work the green swoosh like #9 into it? don't know. Again, I really like your work!