Complex sentence: Just below Devil's Gate Dam, the stream passes underneath the Foothill Freeway; at the north end of Brookside Golf Course the stream becomes channelized into a flood control channel and proceeds southward through the golf course.
Split into simpler sentences: Just below Devil's Gate Dam, the stream passes underneath the Foothill Freeway. At the north end of Brookside Golf Course the stream becomes channelized into a flood control channel and proceeds southward through the golf course.