Mount St. Helens eruptive impacts to the Toutle community ground-water supply

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doi: 10.2113/gseegeosci.xx.2.145
Authors:Sweet, H. Randy; Edwards, John E.
Author Affiliations:Primary:
Sweet, Edwards Assoc., Kelso, WA, United States
Volume Title:Bulletin of the Association of Engineering Geologists
Source:Bulletin of the Association of Engineering Geologists, 20(2), p.145-150. Publisher: Association of Engineering Geologists, Dallas, TX, United States. ISSN: 0004-5691
Publication Date:1983
Note:In English. 3 refs.; sect., sketch maps
Summary:The town of Toutle, approximately 26 miles northwest of Mount St. Helens, has utilized a shallow, high capacity well completed in Recent alluvium of the South Toutle River for its water supply since 1974. Debris and mudflow following the May 18, 1980 eruption buried the well and the nearby treatment facility. Reconnaissance field work showed inadequate stream base flow and no reservoir sites as well as poor infiltration gallery sites along Outlet Creek. Two test wells were drilled on the South Toutle bridge abutment near the old well. Drawndown/recovery tests showed either well capable of producing the necessary sustained yield of 200 gpm. Toutle residents soon complained of an objectionable water taste and medicinal odor. Testing showed the presence of up to 80 µg/l total phenols. Field location of existing wells, a resistivity survey and short aquifer tests were conducted on the upper terrace adjecant to Toutle. During drawdown/recovery tests ground water with phenol concentrations of 12 to 15 µg/l was recovered. The high operation and maintenance costs of iron and phenol removal indicate that a 15 mile pipeline to transmit water from the Cowlitz River is the best water alternative.—Modified journal abstract.
Subjects:Aquifers; Drawdown; Drilling; Engineering geology; Eruptions; Exploration; Ground water; Lahars; Mass movements; Reservoirs; Resistivity; Surveys; Testing; Volcanoes; Volcanology; Water quality; Water wells; Cascade Range; Cowlitz River; Mount Saint Helens; Skamania County Washington; United States; Washington; Outlet Creek; South Toutle River; Toutle; Wells
Record ID:1983051830
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute.
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