Introduction Matthew A. Taylor, PE
Introduction Matthew A. Taylor, P.E. Program Chair & Moderator Senior Project Manager GZA GeoEnvironmental, Inc.
Environmental Business Council of New England Energy Environment Economy
EBC’s Dam Management Committee
Dam Removal, Sediment Management and Stream Restoration
Environmental Business Council New England, Inc.
March 4, 2014 Program Chair: Matthew A. Taylor, P.E. – GZA [email protected]
2
Dam Removal, Sediment Management and Stream Restoration
Meeting Agenda: 1. Welcome 2. Overview of the EBC Dam Management Committee and Program Series. 3. Dam Removal 101 a. Typical Project Sequence b. Project Hurdles c. Dam Removal Project Considerations
4. Today’s Speakers 5. Panel Discussion
What is the EBC Dam Management Committee?
• An EBC Committee focused on identifying and addressing dam management issues that are of interest to EBC members and their clients. • Committee Chair: Chad W. Cox P.E. GZA GeoEnvironmental [email protected]
EBC Dam Management Committee Program Series - 2014 Event Schedule 1. Dam Removal, Sediment Management, and Stream Restoration: Program Date: March 4, 2014 – Program Chair: Matt Taylor 2. Hydrology and Hydraulics in a Changing Climate: Program Date: March 27, 2014 - Program Chair: Chad Cox 3. Dam and Seawall Fund Update: Program Date: May Email Chad at [email protected] 2014- Program Chairs: Chris if you are interested in getting Haker and Beth Lambert
involved with any of these program series.
Today’s Presenters/Panelists: 1. Alex Hackman – Mass DFG-DER New Attitudes Towards Sediment Management
2. Chad Sumner – SumCo EcoContracting Water Control Options and Costs for Dam Removals 3. Nick Wildman – Mass DFG-DER Funding Opportunities for Dam Removal 4. Chad Cox – GZA GeoEnvironmental, Inc. Emergency Removal of Forge Pond Dam
5. Panel Discussion with all Presenters
Dam Removal 101
Why Remove a Dam? 1. To remove a liability 2. Restore a riverine setting 3. Re-establish stream connectivity 4. Cost savings (sometimes)
Dam Removal-101 Typical Project Sequence • • • • •
Dam Inspection Alternatives Analysis Feasibility Study and PrePermitting Final Design and Permitting Construction
Potential Hurdles for Dam Removal Projects 1. Historical Considerations 2. Funding issues
Section 106 of the National Historic Preservation Act of 1966
3. Environmental Concerns - Sediment Management
Dam Removal Project Considerations •
Project Timing
•
Reservoir Drawdown
•
Streamflow Diversion
•
Sediment Management and Erosion Controls •
To dredge or not to dredge
•
Demolition and Removal Methods
•
Disposal of Removed Materials
Dam Removal Project Considerations •
Low flow and high flow channels, limiting velocity
•
Site Restoration relative to Fish Passage
•
Protection of exposed streambanks; revegetation
•
Protection of Existing Features and Structures to Remain
•
Upstream Conditions: •
•
Bridge abutments exposed to foundation scour
Downstream Conditions: •
Downstream flood control features affected by sediment deposition
Questions [email protected]
Environmental Business Council of New England Energy Environment Economy
EBC’s Dam Management Committee
Dam Removal, Sediment Management and Stream Restoration
Environmental Business Council New England, Inc.
March 4, 2014 Program Chair: Matthew A. Taylor, P.E. – GZA [email protected]
2
Dam Removal, Sediment Management and Stream Restoration
Meeting Agenda: 1. Welcome 2. Overview of the EBC Dam Management Committee and Program Series. 3. Dam Removal 101 a. Typical Project Sequence b. Project Hurdles c. Dam Removal Project Considerations
4. Today’s Speakers 5. Panel Discussion
What is the EBC Dam Management Committee?
• An EBC Committee focused on identifying and addressing dam management issues that are of interest to EBC members and their clients. • Committee Chair: Chad W. Cox P.E. GZA GeoEnvironmental [email protected]
EBC Dam Management Committee Program Series - 2014 Event Schedule 1. Dam Removal, Sediment Management, and Stream Restoration: Program Date: March 4, 2014 – Program Chair: Matt Taylor 2. Hydrology and Hydraulics in a Changing Climate: Program Date: March 27, 2014 - Program Chair: Chad Cox 3. Dam and Seawall Fund Update: Program Date: May Email Chad at [email protected] 2014- Program Chairs: Chris if you are interested in getting Haker and Beth Lambert
involved with any of these program series.
Today’s Presenters/Panelists: 1. Alex Hackman – Mass DFG-DER New Attitudes Towards Sediment Management
2. Chad Sumner – SumCo EcoContracting Water Control Options and Costs for Dam Removals 3. Nick Wildman – Mass DFG-DER Funding Opportunities for Dam Removal 4. Chad Cox – GZA GeoEnvironmental, Inc. Emergency Removal of Forge Pond Dam
5. Panel Discussion with all Presenters
Dam Removal 101
Why Remove a Dam? 1. To remove a liability 2. Restore a riverine setting 3. Re-establish stream connectivity 4. Cost savings (sometimes)
Dam Removal-101 Typical Project Sequence • • • • •
Dam Inspection Alternatives Analysis Feasibility Study and PrePermitting Final Design and Permitting Construction
Potential Hurdles for Dam Removal Projects 1. Historical Considerations 2. Funding issues
Section 106 of the National Historic Preservation Act of 1966
3. Environmental Concerns - Sediment Management
Dam Removal Project Considerations •
Project Timing
•
Reservoir Drawdown
•
Streamflow Diversion
•
Sediment Management and Erosion Controls •
To dredge or not to dredge
•
Demolition and Removal Methods
•
Disposal of Removed Materials
Dam Removal Project Considerations •
Low flow and high flow channels, limiting velocity
•
Site Restoration relative to Fish Passage
•
Protection of exposed streambanks; revegetation
•
Protection of Existing Features and Structures to Remain
•
Upstream Conditions: •
•
Bridge abutments exposed to foundation scour
Downstream Conditions: •
Downstream flood control features affected by sediment deposition
Questions [email protected]
