Typereservoir Primary outflowsMarias River Area60.06 km² Outflow locationMarias River
Primary inflowsMarias River Basin countriesUnited States Surface elevation922 m Inflow sourceMarias River
Surface area14,842 acres (60.06 km)
Lake elwell critic
Lake Elwell (a.k.a. Tiber Reservoir) is a reservoir in north central Montana. The reservoir was created by the damming of the Marias River at the Tiber Dam. Lake Elwell was named for Judge Charles B. Ewell (1888–1974), former director of the Montana Reclamation Association.[1]