English to Spanish translations [PRO] Tech/Engineering - Electronics / Elect Eng
English term or phrase:"...Surge shafts and Pondages."
Hello, I´ve been looking in internet and couldn't find a satisfactory translation, it would help if I could understand the meaning of what is a surge shaft! I couldn't find it.
Thank you all of you.
Arlie.
This phrase is found in the following context of description about an electromechanical equipment:
"1.1.1.1 The station service will feed the following auxiliary services:
(1) Auxiliary Service of the Power House
(2) Auxiliary Service of the Intakes, Spillways, Desanders, Surge shafts and Pondages."
The translation workplace 
peer agreement (net): +3
