The Santiam Water Control District maintains eight erosion control revetments in the North Santiam River located between river mile 7.5 and river mile 14.0. The revetments were designed and installed either by the Corps of Engineers or through the Soil Conservation Service. The majority of these revetments were installed in the early to mid sixties. 

For management, budgeting, and assessment purposes, the subdistrict shall be divided into zones, as described below, monies collected from landowners within each zone shall be used only on projects within or directly benefitting that zone:

Zone A: The original subdistrict as described in the Board order creating the McKinney Bottom Subdistrict on March 22, 1971. This zone contains and is benefitted by the existing U.S. Army Corps of Engineers structure at the Sidney location.

 Zone B: That part of the subdistrict, as expanded under the Board's order of march 13, 1978, lying on the north side of the N. Santiam River between Lafky Revetment on the east and Zone A on the west. This zone contains and is benefitted by the existing Corps structures at the Lafky, Pritchard, and Scofield locations.

The major purpose of the subdistrict is the routine annual maintenance of the Corps flood control structures at the Sidney location (Zone A) and at the Lafky, Pritchard, and Scofield locations (Zone B).  The subdistrict may, with the approval of the Board, engage in the removal of gravel bars and channel debris in the N. Santiam River when such removal will provide further protection for an existing structure or will prevent or reduce bank erosion within the subdistrict. The subdistrict may, with the approval of the Board, seek funding for additional flood control projects as needed. Separate budgets shall be prepared for each zone for operations, maintenance, and administrative expenses. Separate assessment rates may be established for each zone if necessary.