Table 9. Monthly and annual percentages of suspended-sediment loads originating upstream of the Gresham gaging station, Johnson Creek basin, Oregon, water years 2007–10.


[Station reference: Complete station names are shown in table 1 and locations are shown in figure 1. For reference, the drainage area of the Gresham gage is approximately 29 percent of Milwaukie. SSL, suspended-sediment load]


First posted October 3, 2012