I emailed the ACA about the whether a map update would be published for the GDMBR this year, particularly in light of the damage done by flooding to the Canadian section last June. I received the following response from Melissa of the ACA Cartography Department:
Hi Ed,
Right now there is no plan to reroute the Canadian section. From reports, there are 2 bridges out that riders seem to be having trouble with - one about 40 km north of Elkford, and one in between Elkford and Sparwood. Other than that, riders have been able to make it through most of the route, managing a few river crossings that seem do-able as long as the water is not really high. We will re-evaluate the need to reroute at our next map printing for this route. Until then, you can follow updates from us and riders on the road at this forum topic in our Temporary Road Closures forum:
http://forums.adventurecycling.org/index.php?topic=11764.new;topicseen#new