near Port Allen Lock, LA
February 1, 2012
NTSB Number: MAB-12-02
Adopted: April 20, 2012
|Vessels||Uninspected towing vessel Natures Way Commander pushing loaded barge ACBL 3111
Two moored U.S. Army Corps of Engineers deck barges
|Location||Gulf Intracoastal Waterway, Morgan City-Port Allen Alternate Route, near Port Allen Lock, Louisiana
30°26.195' N, 91°13.118' W
|Date||February 1, 2012|
|Time||1630 central standard time|
|Weather||Winds 34 mph west-southwest, gusts to about 40 mph Air temperature 63° F|
|Waterway characteristics||Canal was 324 feet wide in accident area, with available clear width reduced by barges (per U.S. Coast Guard)|
The ACBL 3111, a loaded hopper barge pushed by the uninspected towing vessel Natures Way Commander (see figure 1), collided with the moored U.S. Army Corps of Engineers deck barge CE-858 at about 1630 on February 1, 2012. The accident location is shown in figure 2.
Figure 1. The uninspected towing vessel Natures Way Commander.
Figure 2. Section of National Oceanic and Atmospheric Administration (NOAA) nautical chart 11354 in the area of Port Allen Lock. The accident location is shown by the red star; the Port Allen Lock is shown by the red arrow..
About 30 minutes before the collision, the Natures Way Commander was pushing six loaded hopper barges, arranged two wide by three long, toward the Port Allen Lock from the Gulf Intracoastal Waterway. The pilot operating the Natures Way Commander contacted the Port Allen Lock lockmaster by radio to request entry to the lock for transit to the Mississippi River. The lockmaster recommended that the pilot hold up because of the potential effects of a rainstorm approaching from the west. The pilot agreed and reduced his speed to delay entry into the lock.
As the rainfall intensity and wind speed increased, the pilot's visibility became impaired and he attempted to stop his vessel and barges. However, about 1630 the starboard lead barge collided with the Corps deck barge CE-858, which was moored on the starboard (southwest) side of the waterway. According to the pilot, he could not communicate with two deckhands stationed at the head of the tow on the port and starboard sides because of the noise of the heavy rainfall.
Personnel. Following the accident, four Natures Way Commander crewmembers were tested for illegal drugs, and the pilot was also tested for alcohol. All test results were negative. The pilot stood watch in a 6 hours on-6 hours off rotation (on watch 1200 to 1800 and 0000 to 0600). He reported to the Coast Guard that in the 96 hours before the accident he slept a total of 8 hours per day, 4 hours before each 6-hour watch period.
Damage. The collision between the ACBL 3111 and the CE-858 forced the CE-858 to impact and displace the spud barge CE-796F moored nearby. Damages were as follows:
According to the surveyor's report, total estimated damage to the three barges was about $61,750 and damage to the pier was about $44,900.
The National Transportation Safety Board determines that the probable cause of the collision between the barge ACBL 3111 and the U.S. Army Corps of Engineers barge CE-858 was the failure of the pilot of the towboat Natures Way Commander to anticipate the effects of the heavy rain on his visibility and ability to communicate with the forward lookout as he approached the Port Allen Lock in a narrow waterway and his failure to take appropriate measures to avoid the collision.