2015 ORS § 549.710¹
Powers of counties with populations in excess of 50,000
In any county having a population in excess of 50,000, according to the latest federal decennial census, the county court or board of county commissioners may:
(1) Carry out surveys and plan and engage in projects relating to water conservation and flood control.
(2) Contract and cooperate with federal and state agencies, with other counties and with other public corporations in making surveys and planning and engaging in projects relating to water conservation and flood control.
(3) Provide lands and rights of way, operate and maintain flood control projects and do such other things as are necessary for county participation in federal flood control and water conservation projects.
(4) Remove or destroy drifts and drifting material in rivers and streams or on land that has been flooded. [1957 c.296 §1]