Middle Fork Project Project Maintenance

1
Middle Fork Project Project Maintenance

• June 20, 2006

2
MFP Maintenance Summary

• Three General Categories
• Unplanned Outage for Repair and Maintenance
• Planned Major Outages and
• Routine Maintenance.

3
MFP - Maintenance

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

4
MFP - Maintenance

• Planned Major Outages
• Generator Rewinds
• Pelton-Wheel Replacement
• Runner Replacement
• Hell Hole - Middle Fork Tunnel Surge Shaft Repair

5
MFP - Maintenance

• Annual or Periodic Maintenance
• Tunnel Inspection
• Ralston - Oxbow
• Hell Hole Dam Outlet Conduit
• Facility Testing and Maintenance
• Powerhouse Inspection / Testing
• Gate / Valve Testing

6
MFP - Maintenance

• Debris Removal at Reservoirs Diversions
• Removal of Debris at Hell Hole, Interbay and
  Ralston Spillways
• Trashracks cleared at Diversions, Tunnel Inlets
  in Middle Fork Interbay and Ralston Afterbay
• Log Booms at all Reservoirs and Duncan Creek
  Diversion

7
MFP - Maintenance

• Sediment Management
• Removal with Mechanical Equipment
• Hydraulic Sluicing (prior to 1976)
• Slope Fencing
• Slope Protection with Gunite
• Sediment Management Pilot Project

8
MFP - Maintenance

• General Facility Maintenance
• Vegetation - Hand Trimming and Herbicides
• Pest Management - Rodenticide
• Gravel Replacement
• Painting
• Pole Replacement - Power and Communication Lines

9
MFP - Maintenance

• Project Road and Trail Maintenance
• Annual - Vegetation Trimming
• As-needed
• Grading and Restore Road Surface
• Repair and Restore Drainage Structures
• Maintain Signs and Gates
• Snow Removal

10
MFP - Maintenance

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