Hi I’m interested to know how you sealed the intake dam.
I’m having difficulties selling mine. i have put down a plastic membrane but leakage around it is still quite evident.
Hello, sorry for delay on reply. If you mean the wooden constructed box unit where the intake pipes are housed, it is no necessary to 100% seal the box, as it is simply sunken into the larger ‘sub pool’ as we call it. It is important to minimise gaps down to say 5mm though to avoid unwanted debris getting sucked in. In fact an abundance of small holes is good, due to the large flow rates being required of this project, and so there cant be any lag of water refilling the box unit where the pipes housed. Hope this helps,
Pico Hydro project 
Hi I’m interested to know how you sealed the intake dam.
I’m having difficulties selling mine. i have put down a plastic membrane but leakage around it is still quite evident.
Hello, sorry for delay on reply. If you mean the wooden constructed box unit where the intake pipes are housed, it is no necessary to 100% seal the box, as it is simply sunken into the larger ‘sub pool’ as we call it. It is important to minimise gaps down to say 5mm though to avoid unwanted debris getting sucked in. In fact an abundance of small holes is good, due to the large flow rates being required of this project, and so there cant be any lag of water refilling the box unit where the pipes housed. Hope this helps,