Lehigh Portland Cement Co.

AO Bureau

Also Known As

Calmus Creek

Incident Type




Case Status



Calmus Creek


Contaminants of Concern Include

Affected DOI Resources Include

Migratory Birds

Financial Summary

Restoration Funds Collected:


*Restoration Funds Allocated:


*Restoration Funds Remaining:


* 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 area of Calmus Creek affected by the chalky material deposits was estimated to be 4.5 acres. Calmus Creek flows through Cerro Gordo County on into the Winnebago River. The first documentation of contamination was in 1984 and the creek was expected to recover by 2004 without additional releases. The natural resource injuries were the result of chalky solid materials being transported into the creek from adjacent cement plant areas. The chalky materials covered the creek substrate and created high pH conditions in the surface water.

Case Documents

 Document TypeDocument NameDocument Date


 Settlement Agreement Settlement Agreement 02/19/2001


 Restoration Plan and Environmental Assessment Restoration Plan 01/08/2008

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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