To find the RV dump station, you can take I-55 and exit at Grenada. Then, drive on Highway 8 East through the City of Grenada for about three miles. After that, turn left on Scenic Loop 333. Keep following Scenic Loop 333 until you reach the dam. Once you're at the dam, take the second road to the right at the north end of the dam. There, you will find water available.