I believe my grandfather would have been there around that time also. I know that when he turned 18 he shows up on the 1910 census listed as a "nephew" I believe it might have been a boarding house since there were several other "nephews" listed.
If I find any information concerning the orphanage I will let you know.
I have one aunt who is still able to discuss famiy history so I will ask her what she remembers.
regards and good luck with your research