Draft Onondaga Lake Capping and Dredge Area and Depth Initial Design Submittal
Fact Sheet and Links to Documents
Draft Onondaga Lake Capping and Dredge Area Initial Design Submittal and Associated NYSDEC Comments Available for Review
Onondaga Lake Bottom Site (#7-34-030)
Onondaga County - May 2010
The draft Onondaga Lake Capping and Dredge Area Initial Design (dated December 2009) has been submitted by Honeywell and reviewed by the New York State Department of Environmental Conservation (NYSDEC) and the United States Environmental Protection Agency (EPA). This document provides initial design information on the capping and dredging components of the Onondaga Lake remedy. The design document and NYSDEC's comment letter associated with the document (dated April 25, 2010) are available for review in the locations listed on page 4.
Capping and Dredge Area Initial Design Submittal for the Onondaga Lake Bottom Site
Onondaga Lake Design Overview
The Onondaga Lake remediation plan was separated into four designs in order to advance critical design components so that dredging activities can begin as scheduled in May 2012.
This document, which is the third of four initial designs, addresses the capping and dredging parts of the Onondaga Lake Bottom remedy. The design describes the areas of the lake that will be dredged and capped, the components of the cap, and the factors that were evaluated in order to select those components.
Capping and Habitat Restoration
Habitat considerations have been integrated into the Onondaga Lake Bottom capping and dredging design.
The cap will be made up of several layers dedicated to various purposes. These layers will include a habitat layer, an erosion protection layer, a buffer layer, and a chemical isolation layer.
The cap will provide long-term isolation of underlying sediments. It will be resistant to erosive forces such as ice, wind and wave-generated currents, and inflows from tributaries. The cap also will provide a suitable habitat that plants, animals, and fish can use. Sediment caps are a proven technology and have been implemented at numerous sediment remediation sites. The cap will:
- restore and enhance aquatic habitat in the lake
- isolate the contaminated sediment from the aquatic environment
- reduce or eliminate the dissolved contamination flowing from the lake bottom into the upper layers of the cap
- stabilize contaminated sediment, preventing resuspension and transport of contaminants to the deep area and other areas of the lake.
The cap design provides long-term protection to human health and the environment, including plants and fish. A long-term monitoring and maintenance plan will be developed and implemented to ensure that the cap performs as intended.
Dredge Criteria and Volumes
Dredging is a major component of the remedy and is scheduled to begin in May 2012. Just as the cap design was influenced by habitat requirements, the dredging plans also were influenced by the need for various water depths in different parts of the lake in order to achieve specific habitat-based goals.
The lake remedy, which was specified in the 2005 Record of Decision, included dredging up to 2.65 million cubic yards of sediment. Subsequent data collection and more detailed design evaluations from 2004 to present have led to a more accurate estimate of about 2.17 million cubic yards of sediment to be dredged. Dredge volumes will continue to be refined throughout the design phase.
A primary factor in the lower volume estimate is the installation of the Willis-Semet IRM underground barrier wall. Based on data and stability evaluations, the decision was made to move the barrier wall offshore. This placement helped ensure the stability of I-690 and allowed some of the contaminated material to be captured behind the wall.
Future Design Submittals and Next Steps
Public comments will be incorporated into the next design. The other documents associated with the design of capping and dredging and their scheduled submittal dates include:
- Draft Intermediate Design (October 2010)
- Draft Final Design (August 2011)
- Final Design (January 2012).
As the design progresses, each submittal will become more detailed. Other major documents associated with the lake bottom subsite are in various stages of design.
Public input is encouraged throughout the design process. However, comments and questions specific to this Capping and Dredge Area Initial Design are encouraged to be submitted no later than June 30, 2010.
The design team will continue to work with the community to ensure that the health and safety of the surrounding community and environment is maintained throughout the remedy. The community health and safety plans relevant to capping and dredging activities will include:
- Site Security & Community Health and Safety Plan
- Traffic Management Plan
- Navigational Protection
- Noise Abatement Plan.
Project Contact List
The NYSDEC intends to use electronic mailing as much as possible for environmental and economic reasons. If you would like to begin receiving information electronically on the Onondaga Lake Bottom site, such as this fact sheet, please sign up for the Onondaga Lake News email list by visiting the NYSDEC website (www.dec.ny.gov/chemical/52545.html). Once signed up, please also notify the NYSDEC at
Info.R7@dec.ny.gov to stop receiving printed copies in the mail.
Location of Reports and Information
The Draft Onondaga Lake Capping and Dredge Area Initial Design Submittal and other information on the Onondaga Lake cleanup are available online at www.dec.ny.gov/chemical/37558.html on the NYSDEC website. This design document and other Onondaga Lake cleanup documents are also available for review at the locations listed below.
Atlantic States Legal Foundation
658 West Onondaga Street
Syracuse, NY 13204
Phone: (315) 475-1170
Please call for an appointment.
Camillus Town Hall
4600 West Genesee Street
Syracuse, NY 13219
Phone: (315) 488-1234
Liverpool Public Library
310 Tulip Street
Liverpool, NY 13088
Phone: (315) 457-0310
1 Forestry Drive
Syracuse, NY 13210
Phone: (315) 470-6712
Albany, NY 12233-7016
Phone: (518) 402-9676
Please call for an appointment.
NYSDEC, Region 7
615 Erie Blvd. West
Syracuse, NY 13204-2400
Phone: (315) 426-7400
Please call for an appointment.
Onondaga County Public Library - Central Library at the Galleries
447 South Salina Street
Syracuse, NY 13202
Phone: (315) 435-1800
Solvay Public Library
615 Woods Road
Solvay, NY 13209
Phone: (315) 468-2441
Dear Interested Citizen:
This fact sheet provides you with information on the draft Onondaga Lake Capping and Dredge Area Initial Design Submittal, for the Onondaga Lake Bottom Site, a sub site of the Onondaga Lake Superfund Site. If you have any questions, comments or would like more information about this project, please contact:
Mr. Timothy Larson P.E.
NYSDEC, 625 Broadway, 12th Floor
Albany, New York 12233-7016
With respect to citizen participation inquiries, please contact:
Ms. Diane Carlton or
Ms. Stephanie Harrington
Citizen Participation Specialists
NYSDEC, 615 Erie Boulevard West
Syracuse, New York 13204-2400
For project-related health questions, contact the New York State Department of Health (NYSDOH) at the following:
Mr. Mark Sergott
NYSDOH, 547 River Street
Troy, New York 12180-2216
(800) 458-1158, Ext. 27860