An outlet tunnel failure could result in a breach of the original outlet debris dam. We established […] Federal, Public Works, State and Local. Available data for this site Click to hide station-specific text . The project reached 6,000 feet into the tunnel and resulted in finalized as-built drawings for the 60-foot repair area. The tunnel being constructed between Spirit Lake and South Coldwater Creek (See Figure 2) will provide a permanent outlet for Spirit Lake., This .lunnel will permanently * lower the level of Spirit Lake and remove the threat of a breakout and the potential for high water in … Building/Design. Spirit Lake map clipped from figure in USACE (1987) 2. USGS 14240311 SPIRIT LAKE TUNNEL OUTLET NR SPIRIT LAKE, WA. This is the lower end of the outlet tunnel of Spirit Lake. The ranger I spoke to said that many are cedar and are in good shape. Serving as a subconsultant to Catworks, our surveyors established control points within the tunnel and laid out new support ribs. The logs you see floating on the lake in this image are from the 1980 eruption. Details. Without an outlet, the lake began to rise, threatening a breaching of the blockage and release of a massive volume of water. The tunnel is the only outlet for Spirit Lake, and as such it plays a critical role in regulating the water level. Photo by Eric Wagner Image Dimensions: 3072 x 2048. Or, more specifically, the Spirit Lake tunnel, an artificial outlet built out of necessity and completed in 1985. Spirit Lake Outlet Tunnel. Otak provided surveying services for the Mount St. Helens Spirit Lake Outlet Tunnel Project. Available data for this site . May 1, 2020 - Spirit Lake outlet tunnel - Spirit Lake (Washington) - Wikipedia Recent inspections show the tunnel … Columbia River – North Jetty. The problem is a large lake two miles north of the mountain: Spirit Lake. Fall, 1984. Commercial, Federal. About a mile into the tunnel at Spirit Lake the ground has risen about 2 feet. The US Army Corps of Engineers said that's threatening to constrict safe water flow. Because Spirit Lake is located in the Mount St. Helens National Volcanic Monument, the project was transferred to the U.S. Forest Service (USFS) for ownership and management. Join Our Team! Additional Data and Information.--Station data inventory. The 8,465-foot-long tunnel was cut through Harrys Ridge to South Coldwater Creek, which flows to Coldwater Lake and … USGS 14240304 SPIRIT LAKE AT TUNNEL AT SPIRIT LAKE, WA. The tunnel between Spirit Lake and South Coldwater Creek (See Figure 2) provides a permanent outlet for Spirit Lake. Two Wash. senators and a congresswoman raised serious concerns about a drainage tunnel that keeps Spirit Lake from overflowing. Because Spirit Lake is located in the Mount St. Helens National Volcanic Monument, the project was transferred to the U.S. Forest Service (USFS) for ownership and management. The purpose of the barrier is to protect and prevent clogging of the inlet structure, used to regulate the height of the lake, from floating wood debris (timbers, etc. BPA Boyer-Tillamook Road. Spirit Lake received the full impact of the 1980 blast and acted as a debris field for the volcano. The Spirit Lake Outlet Tunnel was constructed by the USACE and turned over to the U.S. Forest Service as owners in 1985. The tunnel opened in 1985. Elk Creek Design Build. It’s a unique entanglement that involves the land, the lake, and a Spirit Lake tunnel created in 1985 to serve as an artificial outlet. Click to hide station-specific text . Photographer The problem is a large lake two miles north of the mountain: Spirit Lake. Map of region, left, and Spirit Lake vicinity, right. Location Taken: US. During original tunnel construction, the greatest difficulty occurred within the 300-foot wide "Julie" and "Kathy L" … Spirit Lake and Mount St. Helens (top), Spirit Lake tunnel intake gate (bottom left), engineer reading piezometer in previously drilled bore hole (bottom center), log debris mat floating on Spirit Lake near the tunnel intake gate (bottom right). Attribution: Natural Hazards , Volcano Hazards Program Office , Region 9: Columbia-Pacific Northwest , Cascades Volcano Observatory , Mount St. Helens Federal. When lake levels began to rise, the U.S. Army Corps of Engineers bored a 1.6-mile tunnel through bedrock to provide Spirit Lake a new outlet. Spirit Lake Outflow and Tunnel. Design and Construction of the Spirit Lake Outlet Tunnel, Mount St. Helens, Washington. In 1982, a governmental task force was formed to evaluate the hazard posed by the blockage of Spirit Lake that resulted from the eruption of Mount St. Helens in May 1980. PROVISIONAL DATA SUBJECT TO REVISION. The 1980 eruption of Mount St. Helens produced a massive landslide and consequent pyroclastic currents, deposits of which blocked the outlet to Spirit Lake. Spirit Lake Outlet Tunnel Scheduled for Repair. The Spirit Lake Outlet Tunnel Intake Channel was improved and updated with a new log barrier. ). 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. Figure 1. Repairs to Mount St. Helens' Spirit Lake Outlet Tunnel Construction workers exit the Mount St. Helens' Spirit Lake Output Tunnel Jan. 11, 2016. In 2016, when the Spirit Lake tunnel was closed for repairs, the lake rose about 30 feet. We are actively seeking humble, dedicated, and committed people to join our diverse group. The 1.6-mile Spirit Lake Outlet Tunnel was built after debris from the 1980 Mount St. Helens eruption blocked natural outflows for Spirit Lake, causing rising lake levels and concerns about flooding. During the closure, the lake … A boat holds back logs near the entrance of a drainage tunnel that acts as a relief valve, keeping Spirit Lake from cresting a dam formed by debris left from the … Or, more specifically, the Spirit Lake tunnel, an artificial outlet built out of necessity and completed in 1985. USGS 14240311 SPIRIT LAKE TUNNEL OUTLET NR SPIRIT LAKE, WA. To prevent an uncontrolled and catastrophic lake break-out, the U.S. Army Corps of Engineers constructed the Spirit Lake Outlet Tunnel from 1984 to 1985. Geologists decided that the safest way to regulate the water in Spirit Lake was to construct a tunnel through the mountain and have it drain in to Coldwater Creek. 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. This was observed in 2015, and the tunnel was subsequently closed in 2016 and repaired. To prevent an uncontrolled and catastrophic lake break-out, the U.S. Army Corps of Engineers (USACE) constructed the Spirit Lake Outlet Tunnel from 1984 to 1985. Click to hide station-specific text . Additional Data and Information.--Station data inventory. To prevent an uncontrolled and catastrophic lake break-out, the U.S. Army Corps of Engineers (USACE) constructed the Spirit Lake Outlet Tunnel from 1984 to 1985. PORTLAND, Ore. - September 25, 2015 – The U.S. Forest Service and U.S. Army Corps of Engineers are pleased to announce the awarding of a contract to repair the Spirit Lake Outlet Tunnel near Mount St. Helens on the Gifford Pinchot National Forest. Spirit Lake Outlet Tunnel Repairs: Work site 1.5 miles in from portal inside 10.5’ diameter drainage tunnel for Spirit Lake on Mt St. Helens. Logs from the lake’s log mat floated upland. In some of the bed-rock portion of the tunnel, the shifting rock constricts the tunnel and reduces its capacity. Constructed in 1985, the tunnel provides the only outflow for Spirit Lake. In October 2014, a routine inspection revealed damage to the outlet tunnel lining, deposits of clay in the outlet tunnel’s interior, and a 2.5-foot PROVISIONAL DATA SUBJECT TO REVISION. Date Taken: Thursday, October 2, 1986. The nearly 2-mile outlet tunnel for Spirit Lake is bored through different kinds of rock. This tunnel will maintain the level of Spirit Lake at an elevation that will reduce the threat of a breakout and the potential for high water in the Columbia River at the Trojan Plant. PROVISIONAL DATA SUBJECT TO REVISION. When the tunnel was reopened and the lake drained, the logs were left marooned. The Spirit Lake Outlet Tunnel measures 1.6 miles in length and was constructed after the 1980 eruption of Mount St. Helens blocked the lake’s natural outflows with debris. Spirit Lake outlet Tunnel, Coldwater Creek, Mount St Helens. The Gifford Pinchot National Forest is responsible for operating, maintaining, and repairing the 1.6 mile Spirit Lake tunnel and the engineered channels at Castle and Coldwater Lakes. A temporary fix is about to begin on the drainage tunnel that keeps Spirit Lake from overflowing and flooding communities downstream. Sager and Chambers (1986) and Sager and Budai (1989) describe original tunnel construction. Available data for this site . The water level of Spirit Lake is maintained at about 3,406 ft by draining water through Spirit Lake Outlet Tunnel, a gravity-feed tunnel completed in 1985. About 2 feet as such it plays a critical role in regulating the water level Taken Thursday. 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