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PMIS 65624 Bettles Septic System Construction After

The scope of this project was to replace an existing septic system consisting of approximately 800 lineal feet of sewer line, three manholes, a lift station and a drainfield. The system served four residences in this community above the arctic circle, which is only road accessible in the winter, when a road constructed of snow and ice is constructed to access the nearest road. The manholes, constructed of corrugated metal pipe, had excessive spalling of the concrete channels, which caused frequent sewer line backup problems (see photo #3 of the black and white photos). The lift station consisted of a wooden subgrade structure, constructed over the two fiberglass septic tanks and the lift station sump (see photo #2). The wooden structure was beginning to deteriorate and had begun the slow process of collapsing as the timbers rotted (see photo #1). The fiberglass septic tanks were distorting, since they were not designed for installation 12 feet below grade, with on the sides and bottoms but not above (See photo #4).The system was completely replaced by approximately 500 feet of insulated sewer lines, cleanouts instead pf manholes (manholes are problematic to maintain and operate in the arctic), three septic tanks and an insulated bed drainfield. Elimination of the lift station and manholes eliminated the operational difficulties of the system and eliminated all confined spaces that existed in the previous system.

U.S. National Park Service

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PMIS 65624 Repair Rehabilitation, ()

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Gates of the Arctic National Park and Preserve, Code: GAAR
Park Facility Management Division, Code: PFMD

Yukon-Koyukuk Borough ; Bettles, Gates of the Arctic National Park and Preserve, Alaska
Latitude: 67.8690032958984, Longitude: -153.386901855469

Other : 656624: Project Mangement Information System
Legacy NPS Focus Record ID : 232512

NPS Park Facility Management Division Digital Collection

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Public Can View

Gates of the Artic National Park and Perserve

Jamie Cupples

Thursday, May 5, 2005 1:32:36 PM

Wednesday, August 9, 2017 4:48:54 PM

akr-Bettles Septic System Construction.jpg

Monday, January 1, 0001 12:00:00 AM

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