ramshorn pond dam rehabilitation public information session
DESCRIPTION
Ramshorn pond dam rehabilitation Public information session. May 14, 2014. PARE CORPORATION, FOXBORO, MA Allen R. Orsi, P.E., Managing Engineer. OUTLINE. Additional Evaluations Proposed Design Approach Additional Design Considerations. Additional evaluations. - PowerPoint PPT PresentationTRANSCRIPT
May 14, 2014
RAMSHORN POND DAM
REHABILITATIONPUBLIC INFORMATION SESSION
PARE CORPORATION, FOXBORO, MA Allen R. Orsi, P.E., Managing Engineer
Additional EvaluationsProposed Design ApproachAdditional Design Considerations
OUTLINE
Upstream Membrane Option
ADDITIONAL EVALUATIONS
Upstream Membrane Option
ADDITIONAL EVALUATIONS
Toe Drain Impacts Reviewed improvements provided by downstream toe drain Existing Seepage Exit Gradient Factor of Safety = 1.2 With Toe Drain Exit Gradient Factor of Safety = 2.0 Dam safety practice designs for a Factor of Safety = 5.0
ADDITIONAL EVALUATIONS
Opinions of Cost
Significant cost impacts associated with contingencies and early stage of design
ADDITIONAL EVALUATIONS
Recommended Approach Upstream Cutoff Wall
Durability Permittability Schedule Drawdowns
ADDITIONAL EVALUATIONS
Proposed Site Plan
DESIGN APPROACH
Proposed Spillway
DESIGN APPROACH
Proposed Low Level Outlet
DESIGN APPROACH
Proposed Upstream Wall
DESIGN APPROACH
Proposed Parking
DESIGN APPROACH
Proposed Public Access
DESIGN APPROACH
Proposed Drainage
DESIGN APPROACH
Control of Water Drawdowns Bypass / Flow Maintenance Cofferdams
Construction Phasing
Detours / Road Closure
Public Access Information / Signage
ADDITIONAL DESIGN CONSIDERATIONS
QUESTIONS