The refocused sediment management approach extends beyond sediment management within the four lower Snake River reservoirs. The PSMP/EIS will identify and evaluate ways that USACE can manage sediment within these reservoirs, but will also examine the sediment input (sources) from upstream watersheds in the near-term, mid-term, and long-term (20 years). The plan will include watershed-scale analyses of all tributaries that could or do contribute significant sediment to the four reservoirs. The intent of the plan is to identify ways to reduce the amount of sediment entering the reservoirs, identify how to manage the sediment once it enters the reservoirs, and identify possible changes to structures or operations to reduce maintenance and associated impacts, while still providing for authorized project purposes, including navigation.

1. Does your agency/organization manage, fund, or otherwise participate in programs, projects, or other activities to gather data related to erosion, sedimentation, or water quality? If yes, please describe your activities.

2. Please describe, in detail, the type of sediment data that is available through your agency. The following are very specific data questions:
   • Do you measure total suspended sediment in creeks or river channels? Where? What is the sampling method (i.e., grab sample, spatially-averaged sampling, etc.)? What is the sampling frequency? Is this sampling associated with a measurement of flow?

   • Do you measure sediment bedload in creeks or river channels? Where? What is the sampling method (i.e., fixed bedload sampler, point-bar sampling, etc.)? What is the sampling frequency? Is this sampling associated with a measurement of flow?

   • Have you prepared sediment budgets or calculated the rate of sediment erosion and contribution to channels for any of the tributary basins or subbasins in the study area?

   • Are you aware of any specific locations that are a major contributor of sediment to tributaries (i.e., landslides, channel incision and widening, specific road segments, etc.). Are these locations mapped? Have you estimated the sediment contributions from these sources?

   • Are you aware of any other studies, surveys, or other sources of information regarding erosion control, sediment management, or sediment delivery/deposition in stream channels that your agency has developed?

   • Does your agency have historic sediment data or studies in your records for this type of information?

   • Does your agency have data collection or studies planned for the near future for this type of information?

3. Are there other agencies with data that we should be contacting to obtain the sediment data or studies described above?

4. Does your agency/organization store or maintain a database for Water quality or Sediment data? Would you be willing to share this data?

5. Does your agency/organization manage, fund, or otherwise participate in programs, projects, or other activities to reduce or otherwise manage erosion and sedimentation (such as Conservation Reserve Program activities to reduce erosion)? Does you agency/organization monitor the effectiveness of sediment reduction programs? If so, would you be willing to provide detailed information?

6. Are you aware of efforts by other agencies/organizations to manage sediments? If so, please provide information on those efforts (and contacts, if possible).

7. Are there gaps in the implementation of erosion and sediment control programs and practices in your geographic area/watershed? If so, please provide information on actions that are needed to augment existing programs and practices?

8. Are you aware of USACE efforts to manage sediment in the lower Snake River system? Would you like to provide input on basin-wide sediment management?

9. Would you be willing to participate in a planning effort facilitated by USACE to develop a long-term strategy for the management of sediment in the Snake River Basin? If yes, how would you like to be involved?
   • Receive updates on the plan status and opportunities for input?
   • Participate in Local Sediment Management Group meetings?
   • Review of technical work products?

10. Would you prefer to be notified of planning efforts by email or regular mail?