supply diversion dam project status open...
TRANSCRIPT
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Supply Diversion DamProject Status Open House
Presented by Molly Davidson, PE – Morrison-Maierle, Inc.
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• Hydraulic roller (“killer dam”)• At least 8 documented incidents since
2011 including one fatality• 8th most visited reach of river in MT• River closures between Woodside and
Tucker
Presentation Title Goes Here
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Hydraulic Roller
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• View looking downstream– Strong current on right, portage left– Horizon line is subtle
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• View looking upstream
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Project Objectives
• Delivery of irrigation water• Public safety• Aquatic benefit
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Project History
• 2011 to current - Incidents at diversion dam• May 2014 – Preparation of Preliminary Engineer Report
and grant application• July 2015 – State DNRC funded grant through Renewable
Resource Grant Program• October 2015 – Engineer selected• November 2015 – Survey completed• February 2016 – Notification of USASE grant award
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Project Funding
• Montana DNRC - $125,000• US Army Corps of Engineers - $300,000• Bitterroot Conservation District - $10,000• Montana FWP - $47,500• Irrigators - $50,000
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Project Schedule
• December 2015 – today – Preliminary design• Today – Meet with interested persons• March 2016 – Permitting• April 2016 – Final design• June 2016 – Bidding • October 2016 - Construction
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Proposed design
• Eliminates hydraulic roller• Recreators can cross dam at any point • Varying slopes over dam• Historic crossing location is less steep
– Lowest point over diversion• Varying flow conditions for aquatic life
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17Presentation Title Goes Here
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• 4:1 vs 20:1
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• 4:1 vs 20:1
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Next Steps
• Consider input from stakeholders• Proceed with permitting• Finalize design
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Presentation Title Goes Here