This is the grant application made to the Yuba Water Agency by the North Yuba Water District for $400 000 to build a siphon to replace the aging Hell 4 Stout wooden flume. It states "The 100yr old wooden flume (126'long 6'wide and 40 tall) will be analyzed to determine the feasibility performance characteristics and costs of replacing the existing flume with a Syphon."
list of items posted on North Yuba Water District public record documents