Concrete Structure Drains
From ASDSO Dam Safety Toolbox
"A system of foundation drains is installed during the construction of a gravity dam. The drainage system usually consists of pipes in the floors of the foundation gallery and foundation tunnels. Periodic measurements of flow from the individual drains should be made and recorded. When flows from drains are minimal, measurements may be made using any suitable container of known volume and noting the number of containers filled per minute. When flows are too great to measure by that method, measuring weirs may be installed as needed in the drainage gutters of the galleries and adits of a dam. Weirs should be located as required to measure flows from specific zones in a dam."[1]
Revision ID: 4948
Revision Date: 12/06/2022