Asian carp sampling effort officially underway on secton of the Litle Calumet River – Uplink Satellite coordinates included


May 20, 2010

Chris McCloud 217‐299‐7128

Ashley Spratt 612‐247‐2976

CHICAGO, IL ‐ A five‐mile section of the Little Calumet River in South Chicago is now closed to all traffic for a period of four to six days as sampling efforts for Asian carp get underway. The closure is necessary for biologists to safely and effectively apply the fish toxicant Rotenone to a more than two‐mile stretch of the waterway at T.J. O'Brien Lock and Dam as a part of ongoing Asian carp sampling efforts by the Asian Carp Regional Coordinating Committee (RCC)

The length and location of the application and fish removal area was chosen to maximize the opportunity to capture Asian carp by including a variety of habitats along a substantial length of river channel that has had a high frequency of positive eDNA detections.

In addition to the Rotenone action, simultaneous electrofishing and commercial netting will take place between the downstream block net and Acme Bend.  Electrofishing and netting will allow for an expansion of the area sampled and a comparison of conventional methods with Rotenone sampling.

The  waterway  will  be  treated  in  one  day,  and  the fish recovery  phase of  the  operation  will  last  for  four  to  five  days.    During  that  time,  the FWS,  IDNR,  and  other  participating  agencies  will  aim  to  recover  as many  fish  in  the  application  area  as  possible  to  determine  the abundance  and  type  of  fish  present  in  the  treated  area. 

The  toxicant will eradicate Asian carp and other fish in the canal, but does  not present a risk to people or other wildlife when used properly.   

To meet the requirements of the Rotenone label, during the operation, people should NOT:

  • Swim or recreate in the treatment area 
  • Catch or eat fish found in the treatment area

Drinking water in homes near the treatment area is safe.  There are no known private wells near the treatment area and the nearest public drinking water system in the direction of flow downstream is over 150 miles away.

During  the  application  and  recovery  phases,  the  U.S. Coast Guard (USCG) will  implement  a  safety  zone from River Mile Post 321.5 to 326.5 to  protect  waterway  users  and  workers  conducting  sampling  operations in  the  vicinity  of  the  O'Brien  Lock.  Access  to  the  river  will  be restricted  for  a  period  of  five  to  seven  days,  meaning  that  boaters will  not  be  able  to  transit  the  safety  zone  until  sampling  operations are  completed  and  the  safety  zone  is rescinded  by  the  USCG. The safety  zone  notice  for  this  sampling  is  published  in  the  Federal Register  and  is  also  posted  online at

Rotenone, a fish toxicant commonly used in fisheries management, was previously used on a six‐mile stretch of the Chicago Sanitary and Shipping Canal in December of 2009 while the U.S. Army Corps of Engineers shut down the Electric Barrier System for routine maintenance.  That effort yielded one Bighead carp caught just above the Lockport Lock and Powerhouse approximately six miles downstream of the electric barrier. No Asian carp have been found above the electric barrier to date.  

Knowledge of the population size and location of possible Asian carp in CAWS is important data that will inform biologists and decision makers on selecting and prioritizing appropriate future actions to keep Asian carp from moving into Lake Michigan.


Slug: Asian Carp Rotenone Event 2

Date: 5/20/10

Time: 3:00 PM (CT) – 3:15 PM (CT)

Satellite: AMC 15KU

Transponder: 01

Slot: A-9

Downlink Frequency: 11706.5

Downlink Polarization: V

Bandwidth: 9 MHz

Symbol Rate: 3.978729

FEC: 3 / 4

Data Rate: 5.5

For technical assistance please call The Illinois Information Service at 217.785.5499.