UNITED STATES
DEPARTMENT OF LABOR
MINE SAFETY AND HEALTH ADMINISTRATION
South Central District
ACCIDENT INVESTIGATION REPORT
SURFACE NONMETAL MINE
FATAL POWERED HAULAGE ACCIDENT
Kimaterials, Incorporated (mine)
ID No. 23-00701
Kimaterials, Incorporated
Old Monroe, Lincoln County, Missouri
December 11, 1995
By
Willard Graham
Supervisory Mine Inspector
Robert Seelke
Mine Safety & Health Inspector
South Central District Office
Mine Safety and Health Administration
1100 Commerce Street, Room 4C50
Dallas, Texas 75242-0499
Doyle D. Fink
District Manager
GENERAL INFORMATION
Donald J. Plaggenburg, dredge operator, age 40, was fatally
injured about 8:50 a.m. on December 11, 1995, when he was crushed
between a truck dump bed and the truck frame. Plaggenburg had
six months mining experience as a dredge operator, all at this
mine.
MSHA was notified of the accident by a telephone call at 2:25
p.m. on the day of the accident by Edward Viehmann, company
president. An investigation was initiated the following day.
The Kimaterials mine, a sand and gravel dredging operation, owned
and operated by Kimaterials, Inc., was located one mile North of
Old Monroe, Lincoln County, Missouri. Principal operating
officials were Edward Viehmann, president and Dennis J. Keeteman,
plant manager. The mine was normally operated one 8-hour shift a
day five days a week. A total of six persons was employed.
A dredge pump was used to extract sand and gravel from a pond.
Dredged material was processed at a sand classification plant and
a gravel wash plant adjacent to the pond. The finished product
was sold locally to commercial ready-mix concrete customers.
Plaggenburg had received annual refresher training in accordance
with 30 CFR, Part 48 on April 21, 1995. The last regular
inspection of this operation was completed May 11, 1995.
PHYSICAL FACTORS INVOLVED
The vehicle involved in the accident was a 1979 Ford, Model
T-800, 10-wheel, dual-axle dump truck equipped with a 10-yard
Galion bed. The truck bed was actuated by a single three-stage
hydraulic cylinder. The bed weight including the hoist mechanism
was 4200 pounds. At the time of the accident the truck bed was
empty.
Mechanical problems had developed with the dual tandem rear axle
on the truck. The axle assembly was being removed for repair at
the time of the accident.
An oak post 98 inches long and four inches square was used to
block the truck bed in an upright position.
DESCRIPTION OF THE ACCIDENT
On the day of the accident major repairs were scheduled at the
operation due to failure of the main pump diesel engine on the
dredge. Loading of customer trucks from stockpiles continued as
usual.
Donald Plaggenburg, victim, reported for work at 7:00 a.m., his
regular starting time. Dennis Keeteman, plant manager, held a
brief meeting with the employees at the main office to discuss
pending maintenance activities.
The crew consisting of Keeteman, Plaggenburg, and two plant
operators, Leon Burkemper and Kent Prinster, began the task of
removing the truck's rear axle. Work was initially started
inside the maintenance shop and the truck was later moved outside
for access to a crane preparatory to removing the bed.
At about 8:30 a.m., Burkemper raised the truck bed and blocked it
in place with the oak post. The four employees worked at
disconnecting the axle assembly components. One of the final
components to be removed was the drive line, which was pried
loose and allowed to fall to the ground. The crew discussed the
need to tie-up the drive line to prevent it from being damaged.
A brief search was made in the immediate area for a piece of
rope. When no rope could be located, Keeteman told Burkemper and
Prinster to "leave it go (tying up the drive line) until a later
time." Plaggenburg had left the area in search of a rope and
apparently did not hear Keeteman's message. Keeteman instructed
Burkemper to lower the truck bed while Prinster moved a front-end
loader from between the truck and the crane.
At 8:45 a.m., Burkemper removed the support post and placed it on
the ground. Burkemper signaled to Keeteman that he was preparing
to lower the truck bed. Keeteman acknowledged the signal and
proceeded to place tools in the bed of the company pickup.
Burkemper stated that he checked to make sure everyone was clear
before he reached inside the truck and actuated the control lever
to lower the bed. As the bed began to descend, Burkemper noticed
a customer truck waiting to be weighed and walked around the
front of the dump truck toward the scalehouse.
Prinster stated that he saw Plaggenburg at the bottom of the ramp
near the dredge when Burkemper signaled prior to lowering the
bed. Prinster moved the loader into position just behind the
truck while Keeteman entered the crane cab which was facing the
opposite direction. Keeteman had moved the crane a few feet
toward the truck when he saw that Plaggenburg had been crushed by
the descending truck bed. The two men were not aware that
Plaggenburg had returned to the truck with a rope to secure the
drive shaft. Prinster ran to the dump truck, started the engine,
and raised the bed. Keeteman removed Plaggenburg and lowered him
to the ground.
An ambulance service and fire department were summoned and
emergency treatment was administered at the scene. Plaggenburg
was transported to a local hospital where he was pronounced dead
on arrival. Death was attributed to blunt chest trauma.
CONCLUSION
The direct cause of the accident was failure to reinstall the
block to secure the bed prior to continuing work on the truck. A
contributing factor was lack of communication between those
involved in the task.
VIOLATIONS
The following citations were issued during the investigation.
Citation No. 4329981, was issued on February 26, 1996 under the
provisions of Sec.104 (a) for violation of 30 CFR 56.14211 (b):
A fatal accident occurred at this operation on December 11, 1995
when a dredge operator, who was assisting in repairing a dump
truck, was crushed by the falling dump bed. The dump bed had
been raised and initially blocked, however, the blocking had been
removed before the accident occurred.
This citation was abated on January 30, 1996 after a safety
meeting was conducted and all employees were instructed on the
subject of blocking equipment in the raised position.
Citation No. 4329288, was issued on February 26, 1996, under the
provisions of Sec 104 (a) for violation of 30 CFR 50.10:
A fatal accident occurred at this operation at about 8:50 a.m. on
December 11, 1995, when a dredge operator was crushed by the
descending bed of a dump truck. MSHA was not notified until 2:30
p.m. on the same day.
This citation was abated on February 26, 1996 after the operator
was made aware of the 30 CFR 50.10 requirements.
Respectfully submitted by:
/s/ Willard J. Graham
Supervisory Mine Safety and Health Inspector
/s/ Robert D. Seelke
Mine Safety and Health Inspector
Approved by,
Doyle D. Fink
District Manager
BR>
Related Fatal Alert Bulletin:
 [FAB95M46]
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