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St Croix River Bridge Construction. Part 2
NASECA-WI Rice Lake Field Event Workshop
September 22, 2016
Rice Lake, WI
Dwayne Stenlund, MSc. CPESC
MnDOT/OES
2014/2015 WI Construction
River Bridge Overview
Towers – typical dimensions Construction Sequence
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Construction Sequence
Delivering Environmental Commitments
• Everyone is supposed to read, understand and implement the 2012 Re-evaluation of the SFEIS
• Wetlands
• Floodplain
• Mussels
• Birds
• Plant species
Environmental Concerns• Watershed districts
• Watershed MO• Departments of
Natural Resources• Pollution Control
Agency• Met Council
• State Historic Preservation Offices
• USACE
• USCG
• USFWS
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Pre-bid, Pre-construction TrainingResponsibility of the Owner
• Owner ultimately responsible for all terms and conditions of all permits, agreements and commitments
• Clear Communication
Learning what really works?New Bridge Construction Over a Wild and Scenic River
Permits & Env. Commitments• Wetland avoidance
• Maintenance of Navigation
• Native mussels protections
• Eagle protections
• Wildlife protections
• Native plant communities
• Aquatic and terrestrial invasive prevention
• Working in waters
• Water appropriations
• Storm water discharge quality
• River water discharge quality
SWPPP (incorporates ECIP)
• Makes someone responsible
• Training requirements
• Identifies all potential sources of pollutant generating activities
• Sediment control
• Erosion prevention• Brown water discharge
prevention• Good housekeeping
Potential of Sediment Discharge
Peter
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Diversity of St Croix Higgins Eye Mussels
Wetland Map
• Parking restrictions
• Access restrictions
Jason
Bottom-line
• Complete & Accurate Planning for all commitments
• No introduction of noxious organisms
• Whatever happens on the barge, stays on the barge
• Nothing but clean water
• Don’t let dumb things happen
• Be Innovative & Creative
• Constantly plan and monitor
Focusing on Strategies
• When, how, where, what
• The contract anticipates and assumes that changes will occur (1401, 1402, 1403, 1904, 1905, 1907).
• 1717.2D Site Management Plan (Contractor Submittal)
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Identifying the Strategy for:
• Above-water works
• On-water works
• Land-to-water works
• On-land works
Total Site Management, specific to location
Managing Storm waterSWPPP Site Management Plan Submittals (Hold-points) Requirement
What is a Site Management Plan? (Amending the Plan Prior to Work)
• A plan developed by the contractor that • Indicates everyone involved, responsibilities, responsible
parties
• Lists when starting, how long
• reveals actions, means, and methods
• Describes reaching an end point
• Develops a Corrective Action work stoppages when problems develop
• Documents the work
High Performance SWPPP Amendments
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SWPPP Amendment Plan LayoutDelivering the Owner (Our) Commitments
How many BMPs are necessary?
Prewashed riprap
Debris fence
Epoxy containment
Containment Boom
SDCB Perimeter
SDSF Perimeter
Sediment trap
Concrete management
Buffer preservation
Dust Prevention
Secondary containment
Universal log perimeter
Porta-tethering/tray containment
Crane diaper
Daily cleanup
Chemical lock boxes
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• Who is responsible for quality control and delivering environmental commitments?
SWPPP for all operators and operations
• Bricklayer
• Carpenters
• Cement mason/concrete finisher
• Electrician
• Iron worker
• Laborer
• Painter
• Piledriverman
• Power equipment operator
• Truck driver
• On-land
• Land to water
• On-water
• Over water
• Tree grubbers• Soil drillers,
Blasters• Concrete mixing,
placement• Excavation,
Grading• Demolitions• Utilities• Mechanics• Refuelers• Waste haulers• Ready-mix
operators• Etc.
1717.2 Quality Control. Someone is responsible for implementation.
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2573.3
25
73
.3
Clear Goals
• 25 NTU, pH 7
• Nothing but storm water leaves the project
Drainage interception (sediment traps)
Program for dealing with construction life curveballs
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Staying within the lines
• Special, endangered, threatened species• Bats, turtles, fish, eagles, orchids, etc.
• Wetlands
• Water impact zones
• Private property
Env. Const. Means & Methods
Soft Wall Coffer Dam
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Snow Berm Perimeter Control
Plastic
Piles that drain in a controlled manner (i.e. to traps)
Carpenters
Isolation of snow from work
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Iron Workers Equipment operators
Barge and Deck OperatorsReady Mix Operators.
Concrete workers
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Toilet cleaners
Segment assembers/post tensioners
Erosion Prevention Operators
What do all the trades have in common?
• Safety
• Have to enter, eat, do business, & work
• Respect others work
• Fix what you wreck, clean what you spill
• Communicate the obvious
• Communicate the weird
• Deploy Creativity
• Ensure quality control at every step
Focus on management of stormwater, where BMPs are just one tool
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Every detail needs thought and every BMP needs maintenance. Quality Control for all operations
• 612-810-9409• ftp://ftp2.dot.state.mn.us/pub/outbound/erosion/Bridge2016/
