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Jim Bonomo
503 - 598 -1960
79354 SW Fanno Creek Dr. unit #6 05 -03 -2011
Crawl space drainage to storm piping.
Dear Jim Bonomo,
The following code sections should be applied to Groundwater drainage installations.
2011 OPSC 1101.5.2 Groundwater collected or drained from under or around buildings shall be
disposed of through approved pipe material, as follows:
(1) Disposal, When practical, such ground -water shall be drained by gravity to a natural surface drainage
course or other approved disposal site.
(2) Sump. When ground water is drained by gravity to a storm sewer system, the ground water shall be
drained into an accessible trapped sump or catch basin.
(4) Ejectors. Subsoil drains which cannot remove groundwater by gravity shall have the storm water
lifted by means of an approved ejector. The discharge shall be drained into the building storm sewer.
(5) Valves and Connections. The discharge pipe from a pump or ejector used to lift groundwater shall be
equipped with a swing check or backwater valve and a gate valve. If the gravity drainage line to which
such discharge line connects is horizontal, the method of connection shall be from the top through wye
branch fitting. The gate valve shall be located on the discharge side of the backwater or check valve
(7) Tracer Wire. All nonmetallic piping for yard, ground or storm water for building sewers shall have an
electrically conductive tracer wire (18ga, insulated copper, or heavier, green in color or other approved
materials) installed in the trench for olocating the pipe in the future. The tracer wire shall run the full
length of the installed pipe, with one end left above the finished grade at the building end of the pipe, or
at a cleanout next to the building wall, and shall be clearly marked. -
If you have any questions regarding the above information please call me at: 503 - 718 -2424.
Sincerely,
George Heimos
Plumbing Inspector, City of Tigard