Hey all...
Lonny's Old Seaport on the Tamar has an issue with silt, especially after this latest drought. Its currently being dredged mind you.
At low tide the inner berths leave the boats on /in the silt. Outer berths have an amount of water available but I'm not sure how deep.
Other than the fact she throws of an odour at times, I'm wondering about other implications.
Firstly, Would sitting in the silt - its very soft from what I can tell (on dude apparently fell in it backwards on the piss and suffocated), would that be very degrading to antifoul or could the mechanical debridement work to ensure "pathogens" cant get a good hold?
Thoughts?
where boats sit in the mud always seems to be a home for barnacles probably less of an issue in tassie with low water temp once there out of the mud and in a clear berth the growth seems to catch on easier to the ares that have mud in the paint
Would be nice to see it cleared out a bit... 1929 size might take a bit more with it though... ouch.
one advantage of having minimum clearance....if you are away from the boat for extended periods and have a calamity such as a seacock give way, or extreme rain it won't sink all the way down. Just settle a bit deeper - hopefully water level below the engine.
Hey mate,
The mud won't hurt the antifoul but itself but when trying to get the thin layer of slime off the mud leaves behind, the antofoul can go with it.
The other issue is the fresh water, even if you sat in deep water for a while and then went back to the salt, your antifoul can stop working.
is that an issue only that far up the Tamar Ben, or would it be the same down at Gravely/Beauty Point?
Silt can also stuff up the water intake and worst of all it enters the prop shaft tube. There was a yacht next to me at the TYC slip many years ago, who went back in, stayed overnight on their wharf on a very low tide then headed down river the next day, he had to haul out again as he cooked his shaft seal from the mud. Nasty stuff. Its so oozy that a boat could still sink in it I reckon
Yes it would be interesting to see the carnage in a repeat of that flood. Its been almost 1 hundred years too.
Select to expand quoteSemusMcgilicoty said...
is that an issue only that far up the Tamar Ben, or would it be the same down at Gravely/Beauty Point?
The silt is worse in that area due to floculation. Silt particles held in suspension in fresh water, meet salt water and become charged, the particles then stick together and settle.
Rosevears is a bit silty and Gravelly Beach a lot better. Not really an issue further down the river.
Pretty toxic silt too. Pitty they can't sell it.
Bounce, love when old threads get taken over by real events.
Any new soundings yet.
Was it bigger than 1929?
Cheers
You can say that again! I will have to be more carefull what I say in jest.........
I was going to go back and bounce this myself but was beaten too it... was a good call there Guitz!!
I've heard the equiv of 3 years worth of dredging has been removed... (source - Cant remember)
Good timing AFAIC.
After i purchase a second hand Bukh DV 24 for my little boat before cleaning the internal cooling system it had been coated in what I believe was silt .
Id say the boat it came out of at some stage was mooring in a river or the head outlet was to close to the engine inlet 
Was thinking of using Duck but went with my tradition means to clean the cooling system 
So if it breaks down in a few years time I guess you will know what Ill call the engine 
Not sure how much (if any) silt was taken from The Seaport but the water under the highway bridge is 10m deeper!!
