This is a brief summary of the secret dumping of approximately 1,400 barrels into Lake
Superior, their discovery, and subsequent efforts to resolve the question of their threat to
the drinking water supply of Duluth, and to the integrity of Lake Superior. It is necessarily
incomplete, and will be subject to revisions and updates as possible. A more detailed
timeline will be available on Save Lake Superior Association's website.
Origin of the barrels 1959 – 1962
Between 1959 October 26 and 1962 September 25 six shipments of barrels and other
containers totaling approximately 200 tons were shipped from Honeywell's operations at
Twin Cities Army Ammunition Plant (TCAAP) to the Corps of Engineers Duluth, Minnesota
vessel yard and secretly dumped along the North Shore of Lake Superior between the
Lester River and somewhere in the vicinity of Knife River, Minnesota. No exact weights or
number of barrels was recorded, only a combination of total weights and approximate
numbers of barrels, producing an estimate of roughly 1,400 barrels dumped.
1968 - First barrels discovered
Stanley Sivertson and Hjalmer Mattson, trawling for smelt with the fishing vessel Hiawatha,
catch a total of six barrels on two separate occasions near the Duluth municipal water
intake. They subsequently avoid trawling in that area, but do not tell anyone of their
discovery until 1976.
1975 - League of Women Voters makes first public inquiry into barrels
1975 June 12 Col Noah letter to US Representative Philip K Ruppe referring to an inquiry
from the Saulte Ste Marie Chapter of League of Women Voters concerning a report by
retired Corps of Engineers tug captain Danforth Andersen reporting atomic waste dumped
in Lake Superior. Captain Andersen ran one of the tugs that dumped the first shipment of
barrels into the lake. Apparently this inquiry ended with Col Noah's response to
Representative Ruppe's inquiry. Captain Andersen in a 1976 August 27 article in The
Evening News of Sault Ste Marie, Michigan, said that he was told by some officials who
accompanied the barrel shipment that the barrels contained atomic waste from a plant
outside St Paul.
1976 - Save Lake Superior Association learns of barrels and begins an
investigation that continues today
In May of 1976 Stanley Sivertson described his barrel catches to Dan Rau, Vice President
of the Save Lake Superior Association (SLSA). Dan interviewed Corps Duluth engineer
Court Mueller on May 13, 1976 about the barrels and informed John Pegors of Minnesota
Pollution Control Agency (MPCA) and Twin Cities reporters, beginning an investigation that
has stretched to over forty three years, and has led to four attempts to recover barrels.
1976 December - Corps makes first attempt to locate barrels
Working aboard the Corps tug Lake Superior, Stanley Sivertson directs Dr Tom Johnson,
University of Minnesota geologist, to the area where Sivertson caught the six barrels in
1968. Using Sivertson's ranges on shoreline landmarks, Dr Johnson is able to find about
100 possible barrel contacts with his towed magnetometer, but no attempt is made to
recover any of the contacts.
1977 June 7-10 - Army's first attempt to recover barrels
In response to continued public concern, the Army attempted to relocate and recover
barrels in 1977 using an Army hard-hat dive team. The dive team, with the help of Dr
Johnson, was unable to relocate any barrels, but did observe the tracks of the trawl doors
from the Hiawatha in the bottom sediment.
1977 July 8 - Army's "Final Report on Classified Scrap in Lake Superior"
An Army report describing the 1977 recovery effort, claiming no harmful contents in the
barrels, and recommending that the search for barrels should be abandoned.
1978 October - "Installation Assessment of Twin Cities Army Ammunition Plant,
Report NO. 129", US Army Toxic and Hazardous Materials Agency, Aberdeen
Proving Ground, MD 21010
An Army report detailing extensive pollution of TCAAP, where the barrels originated,
including contamination with several radioactive elements at several sites within the
grounds. This document also establishes that Honeywell was fabricating depleted uranium
parts in the building where the barrels originated at the time of the report (1978).
1990 May 4 - "Characterization and Evaluation of Contaminated Soil and Sewer
Sludge at Twin Cities Army Ammunition Plant" International Technology
Corporation, St Paul, MN, produced for Honeywell Inc, New Brighton, MN
A contractor's report to Honeywell of the discovery and cleanup of depleted uranium and
several other radioactive elements in the sewer sludge of Building 502 at TCAAP, where
the Lake Superior barrels had originated. Over one thousand 55 gallon barrels of sludge
were removed from the sewers of Building 502.
1990 October 30 - Two barrels recovered
A Twin Cites private contractor working for MPCA and the Corps located approximately 105
barrels of the approximately 1,400 barrels dumped and recovered two barrels, in spite of
Corps efforts to prevent recovery of any barrels. The two barrels were opened by the
Corps of Engineers at their Duluth vessel yard, and found to contain timing devices and
detonators for BLU-3 or BLU-4 cluster bombs. The small explosive charges in the
detonators were later tested and found to be inert. The official version of the recovery was
described in a Corps "Report of Findings, Lake Superior Classified Barrel Disposal Site"
dated 1991 August.
1991 August 6 - Letter to John Pegors, MPCA Region 1 Director from 1990 dive
The contractor who recovered two barrels in 1990 wrote a letter to John Pegors detailing
his concerns about the Corps of Engineers obstruction of the 1990 search and attempt to
recover barrels, including repressing the sub operator's report of detecting a strong geiger
counter response near one of the barrels, and threatening the contractor with legal
prosecution for recovering the two barrels on his own after his contract had expired.
1993 - MPCA identifies new barrel dump sites
After ten days of surveying, three new dump sites were identified: 6.6 miles from Duluth
and east of the mouth of the Lester River at a depth of 130 feet, about 2.5 miles due south
of Stony Point at a depth of 250 feet, and about three miles east of Knife Island at a depth
of 400 feet. Approximately 600 barrels are located, leaving approximately 800 still missing.
1994 June - Seven barrels recovered
A flotilla of contractors and Navy divers aboard Corps vessels recover seven barrels from
the three sites identified in 1993 - three barrels from the Lester River site; two barrels from
the Talmadge River site; and two barrels from the Stony Point site. No barrels were found
at the Knife Island site. This team has made, as of 2017, by far the most technically
capable effort to recover barrels through 2017, yet they recover only 7 barrels, and fail to
find over half of the barrels dumped.
The team included 17 members of the US Naval Mobil Salvage Unit, 4 members of Navy
Sea Systems Command with a Remotely Operated Vehicle capable of finding and
recovering barrels, a 7 man Corps of engineers crew with the tug Lake Superior and a
crane barge, 3 contractors, and an additional 6 people from MPCA and the Corps.
No online documentation of this recovery effort has been found by the author to date, but a
copy of the report is available in the Duluth Public Library.
2008 - Red Cliff Band of Lake Superior Chippewa acquires Department of Defense
money to recover more barrels
Under the Native American Lands Environmental Mitigation Program (NALEMP), Red Cliff
begins the process of searching for and recovering more barrels.
2008 October - UMD Large Lakes Observatory resurveys barrel dump sites under
Red Cliff contract
UMD's research vessel Blue Heron resurveys the barrel fields surveyed by MPCA in 1993,
and confirms the location of the previously located barrels, but does not find any additional
barrels. Approximately 800 barrels are still missing.
2012 July 30-August 13 - Red Cliff recovers 25 barrels
A contractor working for the Red Cliff Band recovers 25 barrels in the most extensive
sampling effort to date. Twenty-two of the twenty-five recovered barrels contain ejection
cup assemblies for BLU-4 cluster bombs, with very small live ejection charges still in the
assemblies. The live charges are approximately 5 grams, a little less than two tenths of an
ounce. Red Cliff had intended to recover 70 barrels, but the discovery of the live ejection
charges required considerable red tape to be unravelled before the ejection cup
assemblies could be brought ashore and transported. The ejection cup assemblies were
repacked in six 85 gallon overpack barrels and returned to the bottom of the lake until
necessary permits could be obtained. They were recovered in the summer of 2013 and
disposed of without public examination.
2016 - Red Cliff acquires additional funds from DoD to continue the barrel
This effort will apparently expand the search area to attempt to find some of the
approximately 800 missing barrels that have never been sampled. A Request for
Proposals was published early in 2017, but additional details are not currently available.
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