[4] The project was the second-most-expensive hydro effort in the state at the time (only the Tongue River Dam, which cost $1.2 million, was larger).
[4] The dam was built on a natural ridge of rock which ran perpendicular to the Missouri River on a point about 0.75 miles (1.21 km) above Big Spring.
[4] About 3 miles (4.8 km) of Northern Pacific Railroad track was moved and raised to prevent it from being inundated by the Toston Reservoir.
[1] Toston Dam generates approximately $900,000 a year in net revenues for the DNRC, which it uses to maintain other state-owned recreation, irrigation, and flood-control projects.
[1] The rakes prevent damage to the dam, and helped to greatly reduce the number of times the power plant had to be shut down in order to clean the penstocks.
In 2009, the Montana Department of Fish, Wildlife and Parks (FWP) warned that the reservoir had been invaded by northern pike which had escaped from private ponds upstream.
[8] In April 2011, the pike problem became so severe that the FWP announced an even more aggressive plan to try to remove the predatory fish from Toston Reservoir and other upstream waters.