OTTERTAIL — The Minnesota Department of Natural Resources will begin construction on Aug. 17 to upgrade the Riviera Public Water Access on the northern shoreline of Otter Tail Lake in Otter Tail County. The access will be closed during construction and is anticipated to reopen by late October. During the closure, boaters can launch at two additional state public accesses on the lake – Pelican Bay/Sportsmans on the east side and Riverside on the …