Old Channel Sediment Remediation Project Prepared for: U.S. - PowerPoint PPT Presentation

Lower Rouge River Old Channel Sediment Remediation Project Prepared for: U.S. Environmental Protection Agency (USEPA) and its partner Honeywell March 2018

Roles and Responsibilities Project Partners U.S. Environmental Honeywell Protection Agency Consultants Consultant Anchor EA Engineering, Science, Wood Group and Technology, Inc., PBC QEA Coordinating Agencies Michigan USACE – Detroit Department of Office of the District Environmental Great Lakes Quality

Meeting Purpose ● Project Introduction ● Proposed Action Overview ● Project Timeline ● Water Quality Monitoring ● Navigation Plan ● Questions/Comments

Lower Rouge River Old Channel LOWER ROUGE RIVER OLD CHANNEL

Sources and Types of Contamination ● Industry dominated land use since 1800s (steel mills, factories, shipping) ● Pollutants discharged to river prior to modern environmental laws  Examples: Industrial waste, stormwater outfalls ● Polycyclic aromatic hydrocarbons (PAHs)  chemicals in coal, crude oil, and gasoline  burning of coal, oil, wood, garbage, etc. ● Non-aqueous phase liquids (NAPLs)  liquids that do not dissolve in water like oil, gasoline and petroleum products

Zug Island in 1973

Zug Island and Old Channel as Wildlife Habitat ● Implementation of environmental regulations have resulted in significant reduction of harmful pollutants in Rouge and Detroit River. ● Now seeing bald eagles, peregrine falcons, osprey, lake sturgeon, lake whitefish, walleye, and beavers ● Undeveloped areas of Zug Island provide habitat for wildlife. ● Detroit River includes bed of coal cinders which serves as rare spawning site for lake sturgeon, a threatened species. (photo credit: DTE Energy)

Choosing a Clean-Up Option ● Protects people and wildlife? The alternatives considered in the Feasibility Study were: ● Complies with requirements? ● Alternative 1 - No Action ● Long-term effectiveness? ● Alternative 2 - Monitored Natural ● Short-term effectiveness? Recovery ● Pollution removal? ● Alternative 3 - Dredging with ● Is it difficult to carry out? Conventional Capping ● Cost? ● Alternative 4 - Dredging with ● Acceptable to the community? Engineered Capping (Preferred ● Sustainability? Alternative) ● Alternative 5 – Dredging.

Clean-Up Overview ● Build a new permanent sheet pile bulkhead wall to stabilize the shoreline along former Detroit Coke & Tar & Ferris Marine Properties ● Use temporary sheet pile walls to stabilize 4 locations in the river to allow dredging ● Dredge approximately 70,000 cy of sediment  Separate out large debris (i.e. cars and pilings) and dispose at landfill  Barge sediment to Point Mouillee CDF  Place sand cover over dredge area as needed ● Place underwater cap where dredging is infeasible ● Site restoration

Map of the Clean-Up STAGING AREAS CAPPING PERMANENT SHORELINE STABILIZATION TEMPORARY STABILIZATION DREDGING TEMPORARY CAPPING STABILIZATION DREDGING

Dredging & Capping ● Mechanical dredging of ~ 70,000 CY of SITE OF material across 10 acres to target areas of DREDGING contamination ● Initial removal of large debris (i.e. cars) ● Loading of sediment directly into barges ● Barge transport to Point Mouillee CDF for offloading ● Separation of additional large debris at CDF ● Capping used in front of AK Steel water intake and one other location to avoid deep dredging near structures ● Water quality monitoring during construction CDF 2 MI

Permanent Shoreline Stabilization ● Bulkhead for permanent stabilization where dredging is deep near shore  Sheet pile wall with tiebacks and walers up to 125 ft long  Openings to allow passage of utilities  Use of dredging and backfill along bulkhead ● Temporary PERMANENT BULKHEAD stabilization where SLOT DREDGING TEMPORARY dredging could STABILIZATION TEMPORARY STABILIZATION affect slopes SLOT DREDGING  Dredging and backfill TEMPORARY  Sheet pile walls STABILIZATION

Springwells Court

Medina Street ● Construction of tie backs and anchor wall to encroach on Medina Street ● Require 3 months of road closure at Medina Street  Full closure of the terminal 25 ft  Half-width closure of an additional 50 feet ● Project Team has coordinated with the City of Detroit & Detroit Economic Growth Corporation ● Petition for temporary closure submitted. ● Plans in place to minimize excavation and provide access to residences

Temporary Inconveniences ● Large equipment ● Increased commercial trucks in residential areas ● Increased tug and barge traffic on waterfront ● Lights (night work) ● Weekend work ● Increased noise ● Temporary street closure (Medina Street)

Project Timeline Activity Timing Mobilization Spring 2018 Permanent Wall Construction Spring 2018-Winter 2018 (December) Dredging and Capping Spring 2019-Winter 2019 (December) Site Restoration Winter 2019- Spring 2020 Demobilization Spring 2020

Water Quality Management ● Special operational & engineering controls  Environmental (e.g. closed) bucket  Use of booms  Use of silt curtains • Moon pool silt curtain around point of dredging • Silt curtains along shoreline • Silt curtain installed along area of intake ● Performance based specifications  Contractor is required to adhere to permit mandated limits

Water Quality Monitoring ● Monitoring upstream and downstream of point of dredging, with two downstream stations ● Monitoring will be performed throughout construction ● Criteria set by permit ● Modify operations when criteria are exceeded

Navigation Plan ● Issue Notice to Mariners Prior to construction ● Coordination with U.S. Coast Guard ● Construction contractors will monitor VHF-FM Marine Channel 16 ● Will make way for freighters/shipments travelling to docks on the LRROC  Receive notice that a commercial vessel will be entering the LRROC  Temporarily halt remedial activities that may hinder commercial vessel access at an appropriate stopping point  Reposition all equipment and turbidity controls from the channel until such vessel has safely passed ● Point of Contact Information Available at Onsite Project Operations Office

Long Term Benefits ● Removing contaminated sediment will reduce exposure to aquatic species and reduce contamination concentrations in fish and wildlife.  taking contaminants out of food chain will make fish safer to eat ● Removal of large debris, like cars, from the river will improve safety for recreational and industrial river users. ● Stabilization of the banks will reduce erosion and improve aesthetics of the lower river. ● Enhancements to the river bed will improve spawning habitats for regionally important species like walleye and lake sturgeon

COMMENTS & QUESTIONS

Contacts ● Rose Ellison U.S. Environmental Protection Agency, Great Lakes National Program Office Tel: (734) 692-7689 e-mail: ellison.rosanne@epa.gov ● Chuck Geadelmann Honeywell e-mail: Chuck.Geadelmann@Honeywell.com