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

Lower Rouge River Old Channel Sediment Remediation Project

March 2018

Prepared for:

U.S. Environmental Protection Agency (USEPA) and its partner Honeywell

Roles and Responsibilities

U.S. Environmental Protection Agency

Honeywell

EA Engineering, Science, and Technology, Inc., PBC

Anchor QEA

Wood Group

USACE – Detroit District Office of the Great Lakes Michigan Department of Environmental Quality

Project Partners

Coordinating Agencies Consultant Consultants

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
• f 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?
• Complies with requirements?
• Long-term effectiveness?
• Short-term effectiveness?
• Pollution removal?
• Is it difficult to carry out?
• Cost?
• Acceptable to the community?
• Sustainability?

The alternatives considered in the Feasibility Study were:

• Alternative 1 - No Action
• Alternative 2 - Monitored Natural

Recovery

• Alternative 3 - Dredging with

Conventional Capping

• Alternative 4 - Dredging with

Engineered Capping (Preferred 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

CAPPING DREDGING DREDGING PERMANENT SHORELINE STABILIZATION TEMPORARY STABILIZATION CAPPING TEMPORARY STABILIZATION STAGING AREAS

Dredging & Capping

• Mechanical dredging of ~ 70,000 CY of

material across 10 acres to target areas of contamination

• Initial removal of large debris (i.e. cars)
• Loading of sediment directly into barges
• Barge transport to Point Mouillee CDF for
• ffloading
• 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

SITE OF DREDGING 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

stabilization where dredging could affect slopes

• Dredging and

backfill

• Sheet pile walls

PERMANENT BULKHEAD SLOT DREDGING SLOT DREDGING TEMPORARY STABILIZATION TEMPORARY STABILIZATION TEMPORARY 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
• f 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
• f the lower river.
• Enhancements to the river bed will improve spawning habitats for

regionally important species like walleye and lake sturgeon

COMMENTS & QUESTIONS

• 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

Contacts