Exercising the Highway 26 Check-dam Monitoring Plan 2003-2004
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Exercising the Highway 26 Check-dam Monitoring Plan 2003-2004

Filetype[PDF-166.57 KB]

  • English

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      Informal Summary Report
    • Abstract:
      As part of an Oregon Department of Transportation (ODOT) State Planning and Research (SPR) project entitled “Water Quality Facility Investigation” the “Rockfall Milepoint 49 Monitoring Plan for Check-dams on Mt. Hood Highway (US 26) (M.P. 49.10 to M.P. 49.23)” authored by Geosyntec was implemented from July 2003 to August 2004. This report summarizes the data collected by this implementation and observations regarding the plan itself. The actual laboratory analysis reports and other data are included as appendices. The objective of this report is to both document the water quality facility observations as well as provide feedback regarding the monitoring plan itself. The report is organized according to the six data collecting activities that were implemented. The ordering of these activities is chronological according to their first implementation. The first site visit served to document the physical condition of the facility. The soil sampling collected sediment samples from the facility for laboratory analysis of grain size and Copper (Cu), Zinc (Zn), Lead (Pb), and Cadmium (Cd) abundance. The water sampling collected water samples from the facility for laboratory analysis of total suspended solids. The water was also analyzed for Magnesium (Mg) and Chlorine (Cl) at the request of a Technical Advisory Committee member. The sanding material sampling collected material from the ODOT maintenance facility stock pile that was used for winter road maintenance along this portion of US 26. This sample was analyzed similar to the sediment samples. The native rock at the site was also sampled for laboratory analysis of Cu, Zn, Pb, and Cd abundance, even though not specified in the monitoring plan. The final site visits documented the ending physical condition of the facility. First Visit The first site visit, as defined in the plan, called for the establishment of a numbering scheme and sampling areas. Staff gauges were also to be installed. The actual first site visit took place on July 31, 2003. During this visit no formal data collection took place but some photos were taken and the features of the site were observed contemplating the implementation of the monitoring plan. It was observed that there was a paucity of sediment in the basins behind most of the check-dams.
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