Complex sentence: It originates in the Appalachian Mountains in North Carolina, where its upper course above the mouth of the Uwharrie River is known as the Yadkin River, and it is extensively dammed for flood control and hydroelectric power.
Split into simpler sentences: It originates in the Appalachian Mountains in North Carolina, where its upper course above the mouth of the Uwharrie River is known as the Yadkin River. It is extensively dammed for flood control and hydroelectric power.