Image: Spirit Lake outlet tunnel
Size of this preview: 800 × 533 pixels. Other resolutions: 320 × 213 pixels | 3,072 × 2,048 pixels.
Original image (3,072 × 2,048 pixels, file size: 3.98 MB, MIME type: image/jpeg)
Description: View of the Spirit Lake outlet tunnel, built in 1985, that allows water to drain out of Spirit Lake safely and maintain the lake's water level 100 ft (30 m) below the estimated overtopping level.
Title: Spirit Lake outlet tunnel
Credit: https://www.usgs.gov/media/images/view-spirit-lake-outlet-tunnel-built-1985-allows-w
Author: Lyn Topinka
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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