Complex sentence: Eleven tributaries of the creek are considered by the Pennsylvania Department of Environmental Protection to be Coldwater Fisheries and another is considered to be a Coldwater Fishery for part of its length and a High-Quality Coldwater Fishery for the other part of its length.
Split into simpler sentences: Eleven tributaries of the creek are considered by the Pennsylvania Department of Environmental Protection to be Coldwater Fisheries. Another is considered to be a Coldwater Fishery for part of its length and a High-Quality Coldwater Fishery for the other part of its length.