Back in the 1970s a Developer built a dyke on the Thompson River Flood Plain in Kamloops, creating the Brocklehurst subdivision. The dykes were breached by spring High Water almost as soon as the first homes were built.

http://www.kamloops.ca/museum/archives/pdfs/N275%20-%20Floods%20in%20Kamloops.pdf

Another Irony from that era of BC Government is the newly created Minister of the Environment getting a huge laugh at a supper meeting of the Cattlemen's Assoc in Kamloops. He got that after making a joke about being happy to be addressing a group that was not creating issues for his new Ministry to deal with.

The joke was that before the Kamloops Pulp Mill was built Bovine Fecal Matter was the major contaminant of regional waterways.

Ranchers used tractors to push the stuff into the nearest stream to wash away, rather than composting it and using Muck Spreaders to fertilise their pastures with it. The SoCred Minister did not realise that his "joke" revealed he didn't have a clue.