Barker Reservoir spill expected this week, Boulder Creek levels to rise
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Each spring as temperatures warm, stream flows increase due to runoff from melting mountain snow. Before peak stream flows occur at lower elevations, like in Boulder, mountain reservoirs must first fill and start spilling. Barker Reservoir’s spill typically occurs between mid-May to late June, with the exact date dependent on weather, snowpack, and early spring reservoir levels.

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