GIS: Integral to Present on Spatial Modeling of Sediment Cap
May 6, 2015

Emerging technologies and current hot topics within the geographic information system (GIS) and geospatial industries are the focus of the 23rd annual GIS in Action: Spatial Connections conference, to be held May 4–6, 2015, in Vancouver, Washington. Integral Senior Scientist Erik Strandhagen, CMS, GISP, and Integral Managing Scientist Susan FitzGerald, L.G., will present a technical session on “Geostatistical Estimation of Current and Target Sediment Cap Conditions at Wyckoff-Eagle Harbor,” on Wednesday, May 6, at 1:30 p.m. Mr. Strandhagen performed the spatial analysis and Ms. FitzGerald led the sediment cap field investigation.

Integral’s presentation focuses on the data collection and spatial analysis components of an investigation at the Wyckoff-Eagle Harbor Superfund site near Bainbridge Island, Washington. A sediment cap had been constructed in several phases to protect the surface ecosystem from creosote-contaminated sediment resulting from a former wood treatment facility. Recent monitoring (2011) showed that most of the cap is physically stable and is protective against exposure to buried contamination, except in two areas where the cap is thin or has been eroded. The project required development of a geostatistical, volumetric 3-dimensional model, which was then used to estimate current and target thicknesses of the sediment cap. The model is based on data from videoprobe recordings and sediment sampling using vibracoring technology. The resulting volume estimates provided a planning tool for the managing agencies to determine where and how much supplemental cap material is needed to reinforce the cap.

The joint-conference is sponsored by the Oregon and Washington chapters of the Urban and Regional Information Systems Association and the Columbia River Region of American Society for Photogrammetry and Remote Sensing. For more information about the conference, visit