In the configuration finally adopted, water to be pumped is taken from the headrace canal with a separate sedimentation arrangement in the forebay so that there are still fewer suspended particles as compared to water supplied to the turbine.    From Wordnik.com.  [1. SALLERI-CHIALSA MICRO HYDEL PROJECT, NEPAL] Reference

During the early part of the flood the timber dam of the Ludlum Steel and Iron Company, which raised the water to a height of 27 feet, and afforded 7.04 horsepower per foot fall, was carried away with a part of the headrace.    From Wordnik.com.  [The Passaic Flood of 1903] Reference

Other improvements that will be started in the coming year include repairing and restoring the mill's headrace, which guides and controls water flow from the river to the mill, masonry repairs to the foundation walls, repainting the cupolas of the Slater and Wilkinson mills and replacing the Slater Mill's 1929 fire suppression system.    From Wordnik.com.  [Projo.com Projo Local News] Reference

The headrace tunnel is.    From Wordnik.com.  [In Play ® - Yahoo! Finance - The basics of investing.] Reference