How much faster is swim in Chattanooga

Hi,


Just wondering how much time an average swimmer drops in Chattanooga with the flow of the river?



I swam IMLP in 2011 in 77 minutes, wondering what I should expect to drop in Chattanooga? (I am on pace now to be like 5 minutes faster)


Please help.



Thanks!



I didn't find the right solution from the Internet.



References:

forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/How_much_faster_is_swim_in_Chattanooga_P5622085

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