Water bureau to blend sources during maintenance operation

The dam in the Bull Run Watershed.

Beginning on March 12, the Portland Water Bureau will begin blending a small portion of water from its Columbia South Shore Well Field with water from the Bull Run Watershed as part of its annual well field mainteance operation.

The blending will continue until March 21, when the bureau anticipates a return to 100 percent Bull Run water until this summer, when well field water is traditionally added as water below the Bull Run Dam falls low to prevent tubidity.