Details about the series can be found at #1's cache page
The Cache
The last one! Hopefully a fun way to finish with this interesting old structure. Good luck.
After finding the last cache please continue downstream and you'll start seeing more signs of civilisation until a building appears ahead of you. This is the canoe club and in front of it is a proper portage point and slipway. Don't go too far as you'll soon reach a weir. Once out there is a short walk along the footpath to the pay and display car park.
Disclaimer
Caches of this nature entail a certain amount of risk. Please only attempt it if you know what you are doing and can take all the necessary precautions. You and you alone are responsible for your safety.
Credits
The_Buffs for accepting me as a Cache by Kayak franchisee 
Background Picture: KayakID: 248777 © Ron Hilton | Dreamstime Stock Photos
Don't worry - this picture does not actually show what you'll be facing.