Utah Administrative Code
Topic - Natural Resources
Title R655 - Natural Resources, Water Rights
Rule R655-11 - Requirements for the Design, Construction and Abandonment of Dams
Section R655-11-7B - Outlet Materials

All outlets will be made of appropriate materials with due regard for loading condition, seismic forces, thermal expansion, resistance to corrosion, and potential abrasion. The use of corrugated metal pipes and other thin-walled steel pipes will not be accepted unless they serve only to provide a form for a poured-in-place concrete conduit or they are specifically accepted in writing by the State Engineer.