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For further details, please review these dam-specific, engineering reports produced by HDR Engineering, Inc.:

  • Geotechnical Investigation & Seismic Evaluation (2013)
  • 2015 feasibility report / alternatives analysis report about potential remediation options (grant-funded by OWRD)
  • 2017 pre-design report for the Big Creek Dam project (grant funded by OWRD)

Links to the seismic evaluations and several presentations prepared for the Newport City Council are included below:

Final Phase 3 Newport Seismic Evaluation Report

Newport Council Worksession 7-20-2015

Newport Council Worksession 9-8-15

FactSheet LO4 7-2-2018.pdf