alpine construction, llc€¢dam foundation incorporates a permanent sheet pile structure which acts...
TRANSCRIPT
![Page 1: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/1.jpg)
,
Alpine Construction, LLC 10 Broad Street
Schuylerville, New York 12871 (518) 695-6739
Dam & Hydroelectric Experience Photographs
![Page 2: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/2.jpg)
Alpine Construction, LLC
Nassau Lake Dam Project
Project: Construction of New Gravity Dam with Integral Low Level Outlet
Description / Highlights
• Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under dam structure.
• Select structural fill contoured to design shapes
• Reinforced concrete gravity dam with energy dissipation basin
• Construct 2-acre wetlands area to offset wetlands areas affected by the construction of the new dam.
![Page 3: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/3.jpg)
Alpine Construction, LLC
Permanent Sheet Pile Cofferdam – Frame Supported
![Page 4: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/4.jpg)
Alpine Construction, LLC
Select Structural Fill Contoured to Design Shapes
![Page 5: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/5.jpg)
Alpine Construction, LLC
Reinforcing Steel Installation of Downstream Energy Dissipation Basin
![Page 6: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/6.jpg)
Alpine Construction, LLC
Completed Dam, Energy Dissipation Basin and Abutment with Low Level Outlet Structure
![Page 7: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/7.jpg)
Alpine Construction, LLC
Middle Falls Hydroelectric Project
Project: Intake Canal Wall Rehabilitation
Description / Highlights
• Design Build Contract with Owner
• Assist with FERC and NYSDEC permitting.
• Cofferdam design concept which allowed operation of the facility during rehabilitation of canal wall.
• Demolition of existing stone masonry and concrete dam.
• Reinforced concrete gravity structure.
• Trash and ice sluice incorporated into the new canal wall section.
![Page 8: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/8.jpg)
Alpine Construction, LLC
Existing Canal Wall Failure
![Page 9: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/9.jpg)
Alpine Construction, LLC
Sheet Pile Cofferdam Strut Supported
![Page 10: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/10.jpg)
Alpine Construction, LLC
Sheet Pile Cofferdam Strut Supported
![Page 11: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/11.jpg)
Alpine Construction, LLC
Canal Wall Construction
![Page 12: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/12.jpg)
Alpine Construction, LLC
Ice / Trash Sluice Construction
![Page 13: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/13.jpg)
Alpine Construction, LLC
Completed Canal Wall with Integral Sluice Gate
![Page 14: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/14.jpg)
Alpine Construction, LLC
Fourth Branch Hydro Electric Project
Project: Intake Canal Wall Rehabilitation
Description / Highlights
• Design Build Contract with Owner.
• Assist with FERC and NYSDEC permitting.
• Permanent sheet pile cofferdam design concept which allowed operation of the facility during rehabilitation of canal wall.
• Select demolition of existing stone masonry and concrete dam.
• Concrete gravity structure.
![Page 15: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/15.jpg)
Alpine Construction, LLC
Existing Canal Wall Failure
![Page 16: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/16.jpg)
Alpine Construction, LLC
Sheet Pile Cofferdam – H-Pile Supported – Design Concept
![Page 17: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/17.jpg)
Alpine Construction, LLC
Sheet Pile Cofferdam –Drill H-Pile Supported
![Page 18: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/18.jpg)
Alpine Construction, LLC
Dewater and Bedrock Clean Preparation
![Page 19: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/19.jpg)
Alpine Construction, LLC
Formwork and Reinforcing Steel
![Page 20: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/20.jpg)
Alpine Construction, LLC
Completed Wall Section
![Page 21: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/21.jpg)
Alpine Construction, LLC
Sissonville Hydroelectric Project
Project: Intake Deck Replacement
Description / Highlights
• Design Build Contract with Owner.
• Assist with FERC and NYSDEC permitting.
• Design concept that did not require complete dewatering of the intake during construction and allowed select operation during non-critical phases of work.
• Demolition of composite concrete and structural steel intake deck.
• Construction of new reinforced concrete deck with stay in place structural steel shoring system.
• Stability of reinforced concrete deck independent of the structural steel shoring system.
![Page 22: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/22.jpg)
Alpine Construction, LLC
Select Pier Demolition
![Page 23: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/23.jpg)
Alpine Construction, LLC
Stay in Place Form / Armoring
![Page 24: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/24.jpg)
Alpine Construction, LLC
Structural Steel Framing for Deck Shoring / Support
![Page 25: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/25.jpg)
Alpine Construction, LLC
Reinforcing Steel Installation with Embeds for Future Trashrake
![Page 26: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/26.jpg)
Alpine Construction, LLC
Complete Concrete Intake with Crane Rails for Future Trashrake
![Page 27: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/27.jpg)
Alpine Construction, LLC
Middle Falls Hydroelectric Project
Project: Dam Rehabilitation
Description / Highlights
• Design Build Contract with Owner.
• Assist with FERC and NYSDEC permitting.
• Select demolition of the abutment and dam.
• Construction of new reinforced concrete dam.
• Installation of post tension anchors.
• Installation of rubber dam
![Page 28: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/28.jpg)
Alpine Construction, LLC
Existing Conditions Dam with Flashboards
![Page 29: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/29.jpg)
Alpine Construction, LLC
Rehabilitation with Rubber Dam
![Page 30: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/30.jpg)
Alpine Construction, LLC
North Abutment Construction
![Page 31: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/31.jpg)
Alpine Construction, LLC
Dam Monolith Construction
![Page 32: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/32.jpg)
Alpine Construction, LLC
Dam Outfitted with Rubber Dam
![Page 33: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/33.jpg)
Alpine Construction, LLC
Geyser Pond Dam
Project: Upstream Cutoff Wall at the Base of the Existing Dam
Description / Highlights
• During construction of the new abutment it was determined that the dam was founded on glacial till that which was causing excessive uplift on the dam.
• Design cofferdam to facilitate phased dewatering of the upstream face of dam.
• Select demolition of timber crib, masonry and glacial till to bedrock.
• Installation of upstream cutoff wall that reduced flow under the dam thereby significantly reducing uplift.
![Page 34: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/34.jpg)
Alpine Construction, LLC
Cofferdam Design to Facilitate Upstream Cutoff Wall Construction
![Page 35: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/35.jpg)
Alpine Construction, LLC
Installation of Sheet Pile around Support Frame
![Page 36: Alpine Construction, LLC€¢Dam foundation incorporates a permanent sheet pile structure which acts as cofferdam and cutoff wall along the upstream face of dam to reduce seepage under](https://reader034.vdocument.in/reader034/viewer/2022051801/5adb958b7f8b9a53618e1a7c/html5/thumbnails/36.jpg)
Alpine Construction, LLC
Cofferdam Dewatered with Upstream Cutoff Complete