Shamarie, you have a female adult Dobson fly, there - Corydalus cornutus. The Dobson fly is nearly totally aquatic, living most its life in riffles under large slab rocks as an efficient predator of mayflies and stoneflies, and best known as the prized smallmouth bait, or "helgramite." The winged version you see is short-lived, emerging from the water as a fully formed adult only to mate and return to a stream bank to lay its eggs on a tree trunk or branch where the young eventually hatch and drop off into the water. Dobson flies are indicator organisms. Their presence as larvae or "helgramites" indicates a health stream. They are completely harmless but those jaws on the adult female pictured can inflict some pain. --Alan