The fiery North Dakota derailment that burned for days early last month was the latest train crash to involve the flawed tank cars that the National Transportation Safety Board has been trying to get off the tracks for decades.

The NTSB said in a preliminary report released Thursday that the July 5 train crash near the small town of Bordulac, North Dakota, caused an estimated $3.6 million in damage to the CPKC railroad tracks and equipment. But the agency didn’t offer many hints about what caused the derailment that happened in the early morning hours that day.

CPKC railroad officials are prohibited from answering questions about the derailment while NTSB is investigating.

The NTSB highlighted the fact that some of the 17 tank cars carrying hazardous materials that derailed were DOT-111 tank cars that have demonstrated time and again that they are prone to rupturing in a train crash. The agency has been recommending eliminating the use of those cars for hazardous materials at least since the 1990s because of their history of problems, and Congress did mandate that they be replaced for hauling flammable liquids by 2029. But even then they could continue to be used for other hazardous materials.

Officials at the Federal Railroad Administration have said it might be possible to move up that deadline by a year, but probably not much more than that because tank car manufacturers don’t have the capacity to do it sooner. There is also a significant cost for the chemical and leasing companies that own them to replacing a tank car.

The NTSB said it will be doing a detailed damage assessment on the DOT-111 tank cars and the more robust newer models of tank cars that were involved in this crash as part of its investigation over the next year or more. Recently, investigators highlighted the way those tank cars worsened the disastrous Norfolk Southern derailment in East Palestine, Ohio, last year when they ruptured and spilled butyl acrylate, fueling a massive fire that prompted officials to needlessly blow open five tank cars of vinyl chloride to prevent a feared explosion.

In the North Dakota crash, it was fortunate that few people lived nearby. Only two homes were voluntarily evacuated for two days while crews put out the fires and dealt with the methanol and anhydrous ammonia that spilled. A dozen of the other cars that derailed were carrying plastic pellets.

No injuries were reported in the derailment itself.

The NTSB said an emergency brake application was done on the train before it derailed, but it didn’t say whether the two-person crew did that or whether the brakes were triggered automatically.

The 151-car train was going about 45 mph when it derailed — which was below the 50 mph speed limit for it since it was carrying a number of hazardous materials cars.

STUTSMAN COUNTY, N.D. (KFYR) – The Stutsman County Commission and Governor Doug Burgum declared a flood disaster in central North Dakota Wednesday after storms did $30 million in damage. The county received between 125 and 150% of its normal rainfall in June and July.

Emergency Manager Andrew Kirking said the big problem is the washed-out roads. Residents have to take alternate routes, adding a lot of drive time.

“County roads in the western part of the county have been getting beat up, and that is to say nothing to the township roads. The county, we don’t want to spend any more money than we have to. You look at these townships and some of the budgets they have, they just can’t take this kind of a beating,” said Kirking.

Kirking said the disaster declaration from Burgum and The Stutsman County Commission will allow them to use Federal and state funding to fix the roads.

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