June 2006 Middle Fork Project Project Maintenance June 20, 2006

1 June 2006 MFP Maintenance Summary Three General Categories:  Unplanned Outage for Repair and Maintenance;  Planned Major Outages; and  Routine Maintenance.

2 June 2006 MFP - Maintenance Unplanned Outage for Repair and Maintenance Hell Hole - Middle Fork Tunnel Collapse Hell Hole - Middle Fork Tunnel Collapse Middle Fork Powerhouse Transformer Failures Middle Fork Powerhouse Transformer Failures Repair Damage from High Flows Repair Damage from High Flows

3 June 2006 MFP - Maintenance Planned Major Outages Generator Rewinds Generator Rewinds Pelton-Wheel Replacement Pelton-Wheel Replacement Runner Replacement Runner Replacement Hell Hole - Middle Fork Tunnel Surge Shaft Repair Hell Hole - Middle Fork Tunnel Surge Shaft Repair

4 June 2006 MFP - Maintenance Annual or Periodic Maintenance Tunnel Inspection Tunnel Inspection  Ralston - Oxbow  Hell Hole Dam Outlet Conduit Facility Testing and Maintenance Facility Testing and Maintenance  Powerhouse Inspection / Testing  Gate / Valve Testing

5 June 2006 MFP - Maintenance Debris Removal at Reservoirs & Diversions Removal of Debris at Hell Hole, Interbay and Ralston Spillways Removal of Debris at Hell Hole, Interbay and Ralston Spillways Trashracks cleared at Diversions, Tunnel Inlets in Middle Fork Interbay and Ralston Afterbay Trashracks cleared at Diversions, Tunnel Inlets in Middle Fork Interbay and Ralston Afterbay Log Booms at all Reservoirs and Duncan Creek Diversion Log Booms at all Reservoirs and Duncan Creek Diversion

6 June 2006 MFP - Maintenance Sediment Management Removal with Mechanical Equipment Removal with Mechanical Equipment Hydraulic Sluicing (prior to 1976) Hydraulic Sluicing (prior to 1976) Slope Fencing Slope Fencing Slope Protection with Gunite Slope Protection with Gunite Sediment Management Pilot Project * Sediment Management Pilot Project *

7 June 2006 MFP - Maintenance General Facility Maintenance Vegetation - Hand Trimming and Herbicides Vegetation - Hand Trimming and Herbicides Pest Management - Rodenticide Pest Management - Rodenticide Gravel Replacement Gravel Replacement Painting Painting Pole Replacement - Power and Communication Lines Pole Replacement - Power and Communication Lines

8 June 2006 MFP - Maintenance Project Road and Trail Maintenance Annual - Vegetation Trimming Annual - Vegetation Trimming As-needed As-needed  Grading and Restore Road Surface  Repair and Restore Drainage Structures  Maintain Signs and Gates  Snow Removal

9 June 2006 MFP - Maintenance Project Recreation Facility Maintenance Performed by the USDA-FS under agreement with PCWA Vegetation Trimming Vegetation Trimming Facility Painting/Repair Facility Painting/Repair Fungicide Application Fungicide Application