Project Name: Dundee Hydroelectric Project
Summary: Dam inspection, analysis, remedial design, and repair
Client: S.D. Warren Paper Company
Project Location: Westbrook, ME
Project Size: 1,400-foot long embankments and spillway
• Dam Safety & Structural Assessment
• Dam Breach Study
• Dam Rehabilitation Design
Project Timeframe: 1991-1992
Relationship with Client: Since 1980
The Dundee Dam in Westbrook, ME is subject to the FERC five-year Independent Consultants Safety Inspection Program. Inspections conducted by Kleinschmidt revealed that the spillway did not meet the FERC’s required safety factors for stability during a Probable Maximum Flood (PMF) event. In addition, the east earth embankment portions of the dam was determined to be subject to liquefaction during an earthquake and both the east and west embankments were not high enough to prevent an overtopping during PMF conditions. Potentially, any of these findings could lead to the dam’s failure.
Based on the analysis results, Kleinschmidt was hired to design remedial measures to stabilize and raise the earth embankments, and to increase the safety factors of the spillway section. Kleinschmidt provided the engineering for the design and placement of 14 rock anchors in the spillway section of the dam to provide the required safety factors for floods up to the PMF. In addition, Kleinschmidt provided construction services for the removal and replacement of an estimated 30,000 cu yds of material in the east embankment and building up of the east and west embankment level by 2-ft and constructing a 2-ft high cantilevered wall to contain the PMF.
SAPPI realized project efficiencies by engaging Kleinschmidt for full service inspection, design, and construction services. SAPPI also came into compliance with FERC’s safety requirements, reduced potential liabilities, and minimized safety hazards associated with the dam.