Complex sentence: After the Mountain Home State Demonstration Forest was set up in 1946, there was an attempt to transfer the park to State control, but this was prevented by the terms of the original donation, and Balch Park today remains under control of Tulare County.
Split into simpler sentences: After the Mountain Home State Demonstration Forest was set up in 1946, there was an attempt to transfer the park to State control. However, this was prevented by the terms of the original donation, and Balch Park today remains under control of Tulare County.