Most of the dykes have access to them but only from one direction i.e. you have to come out the same way you went in. The reason for this is to try to stop illegal dumping, camping, partying and dropping stolen cars. The RCMP can block off the one exit as the cars can not get out the other end because of the closed gate. Regulars on the river like Chris and myself have notified RCMP of illegal activities and they will attend if priorities allow.
Chris has instigated another meeting with City Officials, RCMP, fisher groups, CVRCC etc for this Friday to discuss these closures and access points. Several of us will attend this meeting. It is through these efforts by local interest groups that we have any access at all ! When there is a problem the easiest solution for officials is simply to "close it OFF".
We need to have access but must also work with officials to control the problems. We also emphasize with city officials the economic value that the fishery brings to this area, that usually draws some attention.
Will bring you more info after this Friday's meeting !
Hope this answers some of your questions.