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Site 20: Top Camp Dam

Site History and Background

Top Camp Dam
Top Camp Dam building
(Ridolfi, 2005d)

The Top Camp Dam site is an abandoned water impoundment and treatment facility consisting of a small concrete dam, an impoundment, a pumphouse, and a pipe system in the former Top Camp area.  The facility was built at an unknown date to replace the water supply pipeline system from the Cantonment Area to Top Camp and was used until the Makah AFS was closed in 1988.  The water treatment facility served the personnel and facilities (Sites 5, 6, and 7) at the Top Camp area (Radian, 1987).

Concerns at this site include the abandoned structures and impacts to the natural hydrology.

Activities to Date

The Makah Environmental Restoration Team performed site inspections in October 2000 and in March and April 2004, and the site was one of 10 investigated during the 2004 limited remedial investigation (Ridolfi, 2005d).  One soil sample was collected adjacent to the southern wall of the pumphouse building to determine whether lead that has weathered from paint on the building is present in soil.  The lead result was well below the screening level and was similar to Puget Sound natural background concentrations in soil (Ecology, 1994).  Two samples of building materials were also collected and analyzed for asbestos content, and two paint samples were collected and analyzed for lead content.  Neither asbestos nor lead was detected above screening levels in the samples.

Planned Activities

The Tribe considers this site a lower priority (Priority C).  The following activities are planned for 2006 to 2010:

  • Continue discussions with Makah Fisheries to plan dam removal activities.
  • Remove abandoned structures.
  • Remove the dam.

Dam Removal: The Makah Environmental Restoration Team will collaborate with Makah Fisheries to develop plans for removing the dams and restoring the natural hydrology of the site.

Building Deconstruction and Removal: The water treatment building will be deconstructed and removed.  The deconstruction may involve building structure, foundation, driveway and walkways, undesired parking pavement, and underground and aboveground plumbing and electrical lines.  The construction debris will be shipped off site for proper disposal.

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