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Further response to FOIA request for documents re analyses of potential for debris dam blocking natural outlet of Spirit Lake.Apps C & D documents available in PDR.Portions of App C documents withheld (ref FOIA Exemption 6).

Accession Number: ML20132B592

Date Released: Sunday, October 27, 2024

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• ML20134A181 - Further response to FOIA request for documents re analyses of potential for debris dam blocking natural outlet of Spirit Lake.Apps C & D documents available in PDR.Portions of App C documents withheld (ref FOIA Exemption 6). (7 page(s), 7/15/1985)
• ML20134A516 - Summary of 840223 meeting w/util re Spirit Lake blockage & flooding potential.List of attendees & viewgraphs encl. (14 page(s), 7/15/1985)
• ML20134A495 - Accepts plant-specific licensing action re Spirit Lake blockage.Scheduled target date is 840409. (9 page(s), 3/29/1984)
• ML20134A244 - Informs of acceptance of plant-specific licensing action re review of draft USGS/FEMA rept on possible hazards posed by failure of Spirit Lake Dam.Scheduled target date is 830301.Supporting documentation encl. (23 page(s), 2/24/1983)
• ML20132B759 - Forwards USGS geologic hazards bulletins describing recent Mount St Helens activity through 840207 & USGS review of recent Corps of Engineers rept re proposed long-term engineered solutions to draining Spirit Lake. (2 page(s), 2/13/1984)
• ML20134A222 - Submits daily highlights.USGS & FEMA transmitted draft rept assessing potential hazard to towns of Kelso & Longview, WA from breach of Spirit Lake natural dam on Mount St Helens. (7 page(s), 2/18/1983)
• ML20134A393 - Informs that USGS rept, "Mudflow Hazards Along Turtle & Cowlitz Rivers From Hypothetical Failure of Spirit Lake Blockage," provided to Ofc of Policy Analysis on 840131. (1 page(s), 1/31/1984)
• ML20134A375 - Forwards util response to questions resulting from review of 830701 submittal re potential mudflows at plant from failure of Spirit Lake blockage.Consultant final rept also encl. Decision re meeting will be made after review of submittal. (1 page(s), 9/11/1983)
• ML20134A330 - Advises that charges to TAC 49636 re possible hazards posed by failure of Spirit Lake Dam valid.TAC not included in list of plant-specific licensing actions for FY83.Related info encl. (24 page(s), 3/29/1983)
• ML20132B587 - Provides preliminary findings on potential Spirit Lake mudflow impact on Columbia River & facility.LWA to evaluate assumptions in original mudflow analysis recommended. (3 page(s), 6/20/1983)
• ML20134A422 - Requests clearance to review Spirit Lake blockage issue. NBC News has requested USGS Spirit Lake breakout rept. (1 page(s), 2/6/1984)
• ML20134A483 - Informs of 840223 meeting w/USGS & util to discuss analysis of flooding consequences of breakout of Spirit Lake blockage at facility. (6 page(s), 2/21/1984)
• ML20134A198 - "Mount St Helens Eruption,Challenge to Restore & Protect." (120 page(s), 10/31/1981)