All construction and maintenance work shall be performed under the direct and immediate supervision of the county engineer who shall be deemed responsible for the efficient, economical and good-faith performance of said work.

[C31, 35, §4644-c23; C39, §4644.21; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §309.21]

Referred to in §309.67