Natural causes to blame for Mud Lake flooding, concludes independent report

An independent assessment of flooding that damaged scores of homes in Mud Lake inLabrador has concluded that ice jammed up at the mouth of the Churchill River because of a combination of natural causes, forcing water over the riverbank.

The report by Karl-Erich Lindenschmidt, a professor at the University of Saskatchewanwas released by the Department of Municipal Affairs and Environment on Monday.

• Click here to read full report

A news releasesaid the report also provides guidance on how to prevent and mitigate future flooding, how to develop community-based monitoring, and how to provide early warning for residents.

About 100 people were forced out of their homes on May 17 when the river swelled its banks. Some of the homes were destroyed.

• Province sets aside $2.96M for Mud Lake flooding victims

While the provincial government set aside nearly $3 million for relief, many homeowners were stuck in temporary housing at 5 Wing Goose Bay for months and sought legal advice about a class-action lawsuit.

Lindenschmidt worked with engineering consultant KGS Groupto find out what caused the flooding, and whether the Muskrat Falls project was a factor, as local residents say.

Initial findings released in early September blamed heavy rain anda rapid spring runoff and possible sediment build-up, findings repeated in the final report.

"There was little time for the thick ice cover to deteriorate before the rapidly increasing river flows developed," the authors wrote.

"It is unfortunate that the factors listed above all came together in the same year that the construction at Muskrat Falls could appear to have any potential effect on the river conditions. It is understandable that local residents would associate the flooding with the Muskrat Falls development," they went on to say.

"However, KGS Group has not found any factors that have been significantly influenced by any construction or operation of the Muskrat Falls facilities in 2016 and 2017 and that would have worsened the flood potential at Mud Lake."

The consultants recommend better monitoring of the watershed area and ice conditions to help forecast future ice jams and flooding.

They also recommend a flood management program which would include ice monitoring, an effective communication strategybetween the N.L. government, Nalcorand residents, and possible early warning systems.