Section 36(1)(a) in Bihar Private Irrigation Works Act, 1922
(a)that all works necessary for the passage, across such irrigation work of water courses existing previous to its construction, exclusion, alteration, and of the drainage intercepted by it, and for affording proper communication across it for the convenience of the neighbouring lands, shall be constructed by the applicant, and shall be maintained by him or his representatives in interest to the satisfaction of the Collector;