Interesting to see this article in the Tri-City News, writing about the dikes in the DeBouville Slough area; since about a week ago I found two files in the Chilliwack Forest District, Flood Hazard Management FTP site that appears to contain much information about the local dikes, and are sadly password protected. The public pays for it, but we cannot see it. hopefully someone out there can unlock them for us. One file is named Common.zip and the other is appropriately named Coquitlam.zip.
Hopefully the Friends Of DeBouville Slough (FODBS) know more about it.
Happy New Year !