Rapid City is postponing for a year a $3.7 million project to rebuild the Canyon Lake dam because of excessive runoff from an early October blizzard and other storms.
The amount of water that drained from the Black Hills into Pactola Reservoir in October and November is the second-highest since 1956. Pactola Reservoir drains into Canyon Lake via Rapid Creek.
The early October blizzard that dumped as much as 4 feet of snow in parts of the Black Hills was followed by a warm-up that melted much of it.
Delaying the rebuilding of the 40-year-old Canyon Lake dam will raise the price tag about $33,000.