Alternative Approaches for Implementation of USEPA’s ... · Courtesy of Toyo Pump Bypass Pumping...
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2017 Design and Construction Issues at Hazardous Waste Sites
Alternative Approaches for Implementation of USEPA’s Selected Remedy and Transport of Dredged Material on the Lower Passaic River
Sharon L. Bailey, PE ([email protected]) Thalia A. Loor, PE Maheyar R. Bilimoria, PhD Aliza Gold, EIT
Disclaimer: Although the information in this presentation has been funded by the USEPA it does not necessarily reflect the views of the Agency and no official endorsement should be inferred.
2017 Design and Construction Issues at Hazardous Waste Sites
• 17 mile tidal estuary
• Dundee Dam to Newark Bay
• Key locations- Lower 8.3 Miles of
Lower Passaic River
- Tierra Removal (Phase 1 and 2)
- River Mile 10.9 Removal
Lower Passaic River Study Area (LPRSA)
Background
2017 Design and Construction Issues at Hazardous Waste Sites
• Engineered cap bank-to-bank
• Dredging of contaminated fine sediments:- ~3.5 MCY
- Prevent additional flooding after cap is installed
- Allow for navigation channel (RM 0 – RM 1.7)
• Institutional controls
• Long-term monitoring and maintenance
Selected Remedy for Lower 8.3 Miles
2017 Design and Construction Issues at Hazardous Waste Sites
• FFS focused on limiting openings, evaluated options
• RM 10.9 removal work
• Public Comments on ROD - Does aging infrastructure have the
ability to be operated once or moreon a daily basis over the 5 year construction period?
- What are impacts on road and rail traffic?
- Were Coast Guard restrictions on timing of openings for some bridgesconsidered?
Bridge Issues
2017 Design and Construction Issues at Hazardous Waste Sites
• Identified and evaluated range of options
• Preliminary review: - advantages/disadvantages
- equipment availability
- impact on productivity
- data needs
• Selected for cost estimation: Bypass pumping around bridges
• Needed additional information on bridges
Options Reviewed
• Use of smaller, larger, or specialized equipment
• Bypass pumping (both around bridges and to processing facility)
• Changes in production rates
• Overland piping system
• Hydraulic dredging or combination mechanical and hydraulic dredging
• Upgrades to bridges
• Multiple processing facilities
Options to Minimize Bridge Openings
2017 Design and Construction Issues at Hazardous Waste Sites
Jackson St. BridgeAmtrak Dock Bridge
Clay Street Bridge
Site Survey – December 2014
2017 Design and Construction Issues at Hazardous Waste Sites
Bridge Locations & Clearances in the Lower 8.3 Miles
2017 Design and Construction Issues at Hazardous Waste Sites
• RM 0 to 2.6 / RM 6.1 to 8.3- Vertical constraints: none
• RM 2.6 to 5.7 - Vertical constraint at low tide:
18 to 20 ft
• RM 5.7 to 6.1- Vertical constraint at low tide:
<15 feet at low tide
- Clay Street, Bridge Street
Need to replace this photo
Conceptual Model
2017 Design and Construction Issues at Hazardous Waste Sites
• Navigation channel (RM 0 to RM 1.7)
• Sediment volume: 2,070,000 cy
• No equipment constraints
• Proposed equipment sizing- One or more dredging platforms
@ 3300 cyd (in situ) capacity each
- Mudflats small equipment/double handling
Pulaski Skyway
RM 0 to RM 2.6
2017 Design and Construction Issues at Hazardous Waste Sites
• Height restriction under low tide <20 feet
• Sediment volume: 830,000 CY
• Tugs are limiting equipment- Masts
- Telescoping pilot house
- Line of sight
• Proposed equipment sizing- One or more dredging platforms
- 1,100 cyd capacity (in situ) Hudson River Superfund Site
RM 2.6 to RM 5.7
2017 Design and Construction Issues at Hazardous Waste Sites
• Sediment volume -110,000 cy
• Proposed equipment sized –500 cyd
• Maximum vertical clearance –<15 feet
• Bypass pumping- Screening station at dredge site
- Barge transport to bypass pumping station
- Pumping around bridge(s)
- Barge transport to sediment processing facility
Need to replace this photo
RM 5.7 to RM 6.1
2017 Design and Construction Issues at Hazardous Waste Sites
Tierra Removal Phase 1
Courtesy of John Henningson
Courtesy of Toyo Pump
Bypass Pumping Station
High solids pump
2017 Design and Construction Issues at Hazardous Waste Sites
• Sediment volume – 500,000 cy
• No equipment constraints
• Similar sized equipment toRM 2.6 to RM 5.7 (1,100 cyd)
• Sediment volume – 40,000 cy
• Horizontal constraints of equipment (no vertical restriction)
• Equipment size - 500 cyd
RM 8.1 to RM 8.3
NJTRO West Arlington RR Bridge
RM 6.1 to RM 8.1 RM 8.1 to RM 8.3
2017 Design and Construction Issues at Hazardous Waste Sites
• Daily Production Schedule: - FFS – 4,000 cyd (2 dredges @
2,000 cyd)
- ROD – 3,875 cyd (3 dredges @ varying production rates)
• Bypass pumping- No change in production schedule
• Overall Project Schedule: - ~6 month increase in-water construction
- Multiple pieces of equipmentoperating at the same time
Need to find photo for here
Amtrak Dock Bridge``
Impact on Equipment & Production Schedule
2017 Design and Construction Issues at Hazardous Waste Sites
Estimated Cost for Bypass Pumping Operations
2017 Design and Construction Issues at Hazardous Waste Sites
• Focus was on dredging – large volume of continuously generated material
• Capping material- Pump up river
- Upriver staging
- Backload on barges
• Debris transport
• Equipment transport
Hudson River Superfund Site
Other Issues
2017 Design and Construction Issues at Hazardous Waste Sites
Lower Passaic River Restoration Projecthttp://www.ourpassaic.org
Want Additional Information?
4th Ave Bridge