 | 05/17/1989 | Crane | | Penstock punctured by the impact of a falling crane | Mobile crane rolled off cliff onto the penstock resulting punctures. | Holes punched in penstocks led to curtailment of power generation. |
| 11/30/1989 | Precipitation | | | Penstock damaged from storm | Project inoperative.
|
| 03/08/1990 | Rockfall | Wood | Penstock rupture by a rockfall | Woodstave flowline ruptured by a boulder
| None |
| 06/22/1990 | Rockfall | | Penstock rupture by a rockfall | Penstock failure from rockfall | None |
| 09/21/1990 | | | Penstock collapse | Section of penstock collapsed. | Powerhouse was shut down. |
| 06/19/1991 | | | Penstock failure due to deterioration | Pipeline failure due to deterioration | None |
| 05/09/1992 | | | | Flowline failure | 150 feet of the flowline was damaged. No significant erosion.
|
| 06/11/1992 | | | | Canal breached, penstock collapse
| Estimated 10,000 to 20,000 cy of sediment introduced into river
|
| 07/31/1992 | | Wood | | Failure of small section of wood stave penstock | Minor erosion in existing stream channel |
| 09/08/1992 | | | Failure of headgate to seal | Penstock headgates would not seal. | Exemptee could not complete routine inspection of intake, penstocks, or units. |
