[Geysers] Name of this feature?

[DP]

Hi,
 
I probably should have sent this sooner, but can someone please identify this feature?  It was taken July 10 or 11, 2007.  It is located near/in a run off channel coming from Castle.  It is just over the bridge on the right if you were coming from Sawmill headed for Castle.  I only saw it erupt this once while I was in the park - the water was a bit muddy.
 
Thanks,
Dan Paris
Hudson, NH
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