Oregon Administrative Rules
Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY
Division 73 - CONSTRUCTION STANDARDS
Section 340-073-0070 - Unsealed Earth Pits for Privies

(1) The pit must be constructed with material and in a manner to prevent rapid deterioration, provide adequate capacity, and facilitate maintenance under ordinary use.

(2) Unless otherwise approved by the agent, the pit must provide a capacity of 50 cubic feet for each seat installed in the privy building and must be at least 5 feet deep. The area within 16 inches of the surface grade may not be counted as part of the 50 cubic-foot capacity.

(3) Pit cribbing must fit firmly and be in uniform contact with the earth walls on all sides and must rise at least 6 inches above the original ground line and descend to the full depth of the pit. Pit cribbing below the soil line may be omitted in rock formations.