alternative approaches for implementation of usepa’s ... · courtesy of toyo pump bypass pumping...

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.


• 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


• 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


• 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


• 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


Jackson St. BridgeAmtrak Dock Bridge

Clay Street Bridge

Site Survey – December 2014


Bridge Locations & Clearances in the Lower 8.3 Miles


• 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


• 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


• 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


• 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


Tierra Removal Phase 1

Courtesy of John Henningson

Courtesy of Toyo Pump

Bypass Pumping Station

High solids pump


• 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


• 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


Estimated Cost for Bypass Pumping Operations


• 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


Lower Passaic River Restoration Projecthttp://www.ourpassaic.org

Want Additional Information?

4th Ave Bridge


Questions?

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