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DRAYTONROBBIN BRIDGE
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Existing highway floods at 6-yr flood event ... triggered from 1997 flood. Looked at several ... Construct approach roadways above the 100-year flood event. ... – PowerPoint PPT presentation
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Title: DRAYTONROBBIN BRIDGE
1
DRAYTON/ROBBIN BRIDGE
- OFFICE OF PROJECT DEVELOPMENT CONFERENCE
- November 18 19, 2008
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OUTLINE PRESENTERS
- PCR
- James Rath, Design Division
- Grading Design
- Derek Pfeifer, Design Division
- Soils Design
- Jon Ketterling, Materials and Research Division
- Bridge Design
- Ryan Rykowsky, Bridge Division
- Environmental Permitting
- Sheri Lares, Environmental and Transportation
Services
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Location
- Red River Crossing -ND Highway 66 MN Trunk
Highway 11
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Purpose and Need
- Approach roadway west side of Red River Crossing
Photo of 1997 flood
- Floods frequently and for extended durations
- Existing highway floods at 6-yr flood event
- Overtopped 15 times since 1954 (USGS data), 5
times since 1996 - Personal and economic hardship to adjoining
residents - Disruption to emergency services
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(No Transcript)
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LengthyDetours
- Closure at Drayton, Oslo, Joliette
- 73 mile detour
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LengthyDetours
- Additional closures at Pembina Oslo
- 142 mile detour
- Open only at Winnipeg and Fargo
- 220 mile detour
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Roadway Closure
- Closed 15 times average closure of 19 days
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History on Proposed Improvements
- Hydraulic Studies
- NDDOT 1969
- NDDOT 1978
- Parsons Brinkerhoff 1997
- Parsons Brinkerhoff 1999
- Results
- Looked at several alternatives
- All raised road to 30-year flood event
- All had increase to 100-year flood event
- Several required the roadway to be closed for
construction - No action
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History on Proposed Improvements
- USACOE 2001
- Study triggered from 1997 flood
- Looked at several alternatives
- All raised road to 30-year flood event
- Most had no increase to 100-year flood event
- Decision to wait until 2002 to start
environmental documentation
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Objectives defined
- Construct approach roadways above the 100-year
flood event. - Provide one foot of freeboard between the low
girder of the bridge and the 100-year flood
event. - Provide adequate waterway opening for the
100-year flood event with no increase in
headwater at Drayton. - Keep the highway open during construction with
minimum disruption to traffic.
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USACOE 2004 Report
- Completed to meet project objectives and address
newly constructed ring dikes in MN - New alignment required to keep road open during
construction - Raise road above 100-year flood event
- Resulted in four base alternatives with 17
subalternatives
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Proposed Improvements
- Alternative Advanced Alternative 5B1-a
- Single 4,090 foot bridge
- No overbank excavation
- No increase in headwater at Drayton for 100-year
flood event - Alternatives considered
- Single Bridge with overbank excavation
- Two bridges with overbank excavation
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Single Bridge with no overbank excavation
Alternative 5B1-a
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How objectives are met
- Construct approach roadways above 100-year flood
event (stage 800.09) - Centerline roads at elevation 802
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How objectives are met
- Provide one foot of freeboard between the low
girder of the bridge and the 100-year flood
event. - Accomplished during Design Phase
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How objectives are met
- Provide adequate waterway opening for the
100-year flood event with no increase in
headwater at Drayton. - Hydraulic analyses concludes no increase in
headwater at Drayton
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How objectives are met
- Keep the highway open during construction with
minimum disruption to traffic. - Bridge constructed on a new alignment
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Impacts
- Right of Way
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Impacts
- Former gas station in Robbin
- Drilling Investigation Report
- Soil corrective action not warranted
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Impacts
- Robbin Camp Hall-eligible for Historic Register
- MN ND SHPO-no effect
- CSAH 18 shifted west to avoid impacting building
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Impacts
- Wetlands
- Forested Wetlands
- Trees
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Impacts
- Floodplain
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Impacts
- Social and Economic
- Positive impacts Emergency vehicles
- Positive Impacts Businesses
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Impacts
- Eligible for the Historic Register
- Offered for adoption some interest but no
commitments - Structure will be recorded with photographs,
plans, and narrative - Recorded information will be archived
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THANK YOU
- Comments or Questions taken at end of last
presentation for this project
