grant evans wrote:I reckon the full extent of damage to road and bridge infrastructure, particularly in the upper Mersey is yet to be seen...
Good news folks. Upper Mersey is unscathed and 2WD access is fine via Borradaile Plains and Bare Hill!
If you would like more detail, read on...
The police website mentioned Mersey Forest Road being closed 2km south of Olivers Road. There was no mention of Olivers or Borradaile Roads so I went through Mole Creek only to find Olivers Road IS closed. So...
We back tracked almost to Deloraine (Union Bridge Road closed) and headed through Railton (Bridle Track closed), Sheffield, Claude Road and Gowrie Park. The Western end of Olivers Road had a "Road Closed Ahead" sign so we proceeded over Mt Claude to the Lemonthyme Power Station turn-off where Olivers Road was barricaded off but Lemonthyme Road was fine.
After seeing the sight of rails dangling in mid air where the Kimberly railway bridge has been washed away we were not confident at this stage but we cautiously pressed on.
Gads Hill, Borradaile and Bare Hill Roads were all fine. After turning right into Mersey Forest road there was a small section where the eastern side of the road has fallen away but it has been shored up and barricaded. Arm River appears to have peaked below bridge level and the Mersey through the Whitewater Reserve appeared to have only been about a metre aboove normal generating levels.
The road beside Lake Rowallan showed a little flood damage close to the boat ramp but was in normal condition for the rest of the way. The Walls of Jerusalem had the very top of a fallen tree scattered over it and we did not look any further up the road. We probably could have shifted the debris but were running out of light and keen to check Pine Hut Plain.
None of the streams past the Fish River showed any sign of flooding at all (Stretcher, Juno, etc.). By the time we reached the Lees Paddocks car park we were extremely optimistic. Sure enough, the footbridge is fine and Pine Hut Plain itself appears to have enjoyed a solid but fairly normal flood event. I would say a 1 in 5 year flood based on my frequent visits to the area.
Amazingly most of the devastating impact of the Mersey River flooding appears to have originated north of Lake Rowallan. I suspect the Fisher and, perhaps, Little Fisher are the main culprits along with all the inflows north of there.
Bottom line... If you're comfortable with Tassie's unsealed forestry roads you should be fine getting to the Upper Mersey via the route I've described. Take it easy though.