Riffle Summary - Proportion of riffle habitat comprised of gravel and fine silts/organic substrate
Basin Reach Total Riffle Area (m2) % Riffle Area Boulders (per 100-m2) % Gravel 1/ % Cobble % Fines 2/
Miller Creek Miller 1 203 45% 5 27% (M) 35% 33% (UD)
  Miller 2 319 14% 5 25% (M) 40% 16% (M/D)
  Miller 3 0 0% 0 NA NA NA
1/ Riffle Gravel Condition: % Gravel < 15% = Undesirable; % Gravel >= 15% & < 35% = Marginal; % Gravel > = 35% = Desirable
2/ Riffle Fine Condition: % Fines > 25% = Undesirable; % Fines <= 25% & >=12% = Marginal; % Fines < 12% = Desirable
Data Source: ODFW 2000