Replace the original intake gate at Spirit Lake Tunnel; conduct geotechnical drilling to more accurately determine safe conditions for existing and possible future alternate outflow systems to control water levels in Spirit Lake.
Location
Spirit Lake is located north of Mount St. Helens and east of the Johnston Ridge Observatory on WA-504 E within the Mount St. Helens National Volcanic Monument.
Project timeline
1
Scoping Start
10/01/2019
2
Comment Period
12/17/2019
3
Objection Period Start
04/07/2020
4
Decision
03/2021 (Estimated)
5
Implementation
03/2021 (Estimated)
NEPA / regulatory detail
| Special Authority | Not Applicable / Other |
| Notice and Comment Regulation | 218 (2013) Non-HFRA |
| Project Activity | Facility Maintenance; Special Area Management |
| Spirit Lake Tunnel Intake Gate Replacement and Geotechnical Drilling Project | Decision Signed Date: 03/16/2021 |
| Forests | Gifford Pinchot National Forest |
| Districts | Mount St. Helens National Volcanic Monument |
| Legal Land Description | Not Applicable |