What is the problem
Bath Street Jetty is located in Bath Street Maylands. The foreshore is located on the outer bank of a channel meander that has been eroding. The navigation channel is located in close proximity to the site, with the deepest channel section located immediately downstream of the site.
The Bath Street site is a public reserve with concrete sheet-piling abutting the foreshore and a public jetty backed by a narrow foreshore reserve. The adjacent high relief bank has been terraced using limestone block walling. Bank retreat is occurring between the upstream extent of the sheet-piling and the adjacent private property walling.
Damage to the concrete sheet-piling and function of the walling is focused on areas of drainage, with the most significant damage occurring downstream of the jetty.
The bank retreat behind the damaged structure in one location has been greater than one metre in one year. The foreshore walling is no longer functional in sections at Bath Street due to the age, lack of maintenance, lack of backfill and
Inappropriate drainage management.
The stabilisation options for the site are restricted by the narrow foreshore reserve, ability to access the site, minimising reclamation of the river, and maintaining a suitable navigation clearance for the jetty.
The stabilisation works will require integration with the adjacent foreshores, with hard walling upstream and an eroding scarp downstream that has recently been stabilised with geo-textile matting and rock toe protection (Figure 2.11).
How are we going to fix it
The City has just been successfully granted $123,000 from the Swan River Trust to undertake installation of a 130m long revetment wall. The City of Bayswater will also be allocating $123,000.
The Project will be completed in two phases.
1. Detailed Design Now – December 2010
2. Construction – January – July 2011