A wood or stone bar is placed at the junction of water diversion to lower ditches.
This is most likely caused by depleted riparian zones and water diversion.
Officials here have argued that the water diversion undercut the potential for growth.
The first blast started clearing tunnels for water diversion.
They fear that water diversion will lower river levels and shorten the rafting season.
A mill lade or water control diversion is clearly indicated on Roy's 1747 map.
"The water diversion has certainly affected the game-fish population over the years," he said.
By the early 1870s water diversions were being used to irrigate an extensive area of corn and other crops.
Some sections are agriculturally cultivated with water diversions for irrigation systems.
With the water diversion, the cost would rise to $1.4 billion.