Nahant Marsh NPL Site

AO Bureau

Also Known As

None

Incident Type

Chemical

State

Iowa

Case Status

Closed

Location

Nahant Marsh

Authority

Contaminants of Concern Include

Affected DOI Resources Include

Migratory Birds

Financial Summary

Restoration Funds Collected:

*Restoration Funds Allocated:

$2.40

*Restoration Funds Remaining:

$0.00

* Restoration Funds can contain multiple settlements/projects. All collections are placed in interest bearing accounts. For detailed information on individual settlements/ projects please visit: NRDAR Status Report

Case Description

The Nahant Marsh Superfund Site is located at 4220 Wapello Avenue, City of Davenport, Scott County, Iowa. The Nahant Marsh Superfund Site includes about 115 acres of wetland and adjacent upland cover all of which are part of a 500 acre marsh complex. Between 1969 and 1995, a private gun club used the marsh for a trap and skeet shooting range. An estimated 243 tons of lead shot were deposited in a 70 acre portion of the marsh based on gun club shooting records. As a result of U.S. Environmental Protection Agency (EPA) directed a remedial investigation, feasibility study and removal action for the Site paid for out of the Superfund account.

The remedial investigation and risk assessments determined that an area of 20 acres in the marsh and 3 acres of soil cover between the marsh and the shooting platforms posed unacceptable risks to human health and the environment. A removal action was designed for these 23 acres. About 60,000 cubic yards of contaminated marsh sediments and surface upland soils were removed and temporarily stored in a 10 acre open field within the property for treatment and disposal. The excavated sediment and soils were treated with a phosphate compound and transported to the Scott County landfill for use as intermediate cover materials.

The removal action was completed between February and May 1999 and was coordinated with the U.S. Fish and Wildlife Service (FWS). The slope of the upland area was re-graded to as close as possible to the original contours and re-seeded with a cover of an annual plant species. The marsh substrate and shoreline contours were shaped to enhance the habitat for wildlife and left as open water areas.

Case Documents


 Document TypeDocument NameDocument Date

Factsheet

 Factsheet Fact Sheet 09/11/2001

Settlement

 Consent Decree Consent Decree-Scott County Sportsmen 12/23/1999

Restoration

 Restoration Plan Restoration Plan 09/01/2001

Map View

Case Contact

Rock Island Ecological Services Field Office

Moline, IL | (309) 757-5800 | http://www.fws.gov/midwest/RockIsland/

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