Site Selection - Inventory was performed along all county, state, and federal roads within the Lapwai and Big Canyon Creek watersheds. Each road was divided into sections and labeled with a unique number. Most segments followed road junctions.
Weed Groups - Weed species were organized into the following management groups established by the Clearwater Basin Weed Management Area (CBWMA): eradicate, control, contain, reduce, and custodial. Each of these management groups has a defined management or treatment objective (Table 1).
Table 1. Weed Groups Established by the CBWMA
Management
Group | Management Objective/Definition |
| Eradicate | Elimination of every individual weed and all viable seeds or propugules. |
| Control | Viable seeds and propagules are prevented to decrease the distribution overtime. |
| Contain | Weeds are geographically contained and are not increasing beyond the perimeter of infestation. |
| Reduce | The density or rate of spread of weeds is reduced across a geographic area. |
| Custodial | Infestations are treated in association with other weed activities. Either the weed is not invasive or infestation is beyond capabilities of groupings. |
Site inventory - Inventory data collected includes presence/absence of weed species and % cover of present species. The inventory collected was completed by road segment and weed locations were documented using the odometer of a vehicle.