1) Sewer lines shall be laid on a straight alignment and uniform slope between consecutive manholes.

2) Horizontal and vertical curves in sanitary sewers are not permitted.

1) Sewer mainlines and lateral mainlines shall be separated from all other utilities by a minimum of 5 feet clear.

2) Sewer mainlines and lateral mainlines shall generally be separated from water mainlines by a minimum of 10 feet. In no case shall the separation be less than 5 feet or as required by OAR 333-061.

3) Water Main Crossings.

1) Unless otherwise approved by the Director, sanitary sewers shall generally be located in the street right-of-way five (5) feet from the street centerline on the low side of the street. Unless otherwise approved by the Director, horizontal alignment of new sewer mainlines shall be parallel with the centerline of the right-of-way.

2) Where sewer alignments cross the street centerline, the design shall demonstrate that the requirements of ORS 92.044(7) are satisfied with relation to street centerline monuments (ie. utility infrastructure is not to be placed within 1 foot of a survey monument location shown on a plat).

3) If streets have curved alignments, the minimum distance between manholes or sewer lines and the curb face shall be as listed below. For streets improved to less than full width, the location shall be measured from the future curb location. The intent is to prevent a conflict with new storm drain lines while still providing for the least number of manholes required to transverse the curve.

1) Offset: When sewers in easements are approved by the City, the sewer line shall be offset a minimum of 6 feet from any property line, or 1/3 the required easement width, whichever is greater.

2) Sewers in easements will be allowed only after all reasonable attempts to place the mains in a right-of-way have been exhausted. All easement installations must be approved in writing by the Director on a case-by-case basis.

3) The conditions of the easement shall be such that the easement shall not be used for any purpose which would interfere with the unrestricted use for sewer main purposes. Under no circumstances shall a building or structure or tree be placed over a sanitary sewer main or sewer easement, nor shall any parallel fences be constructed within the easement (access gates acceptable to the City shall be installed in fences which the City allows to be constructed across City easements). Prohibited structures shall include decks, as well as footings or overhanging portions of structures located outside the easement.

4) Easement locations for public sewer mains serving a PUD, apartment complex or commercial/industrial development shall be in parking lots, private drives or similar open areas which will permit an unobstructed vehicle access for maintenance by City forces.

5) All easements must be furnished to the City for review and approval prior to recording. All recording costs shall be borne by the Developer.

6) Minimum Easement Widths: Unless otherwise specified or authorized by the City, minimum easements widths for sanitary sewers shall be as follows:

7) Easement widths shall vary from the minimum by even foot increments. Sewers with a nominal inside diameter of 24 inches or larger will require wider easements than outlined above.

8) Common placement in the easement of a sanitary sewer and storm drain line may be allowed under certain conditions subject to approval by the Director. Easements wider than the minimum may be required.

9) Common easements will be reviewed on a case-by-case basis. Separation of utilities must meet Oregon State Department of Environmental Quality (DEQ) and Oregon Health Authority, Drinking Water Services (OHA-DWS) requirements.

1) The top of all sanitary sewers entering or crossing streams shall be at a sufficient depth below the natural bottom of the stream bed to protect the sewer line. As much cover as possible shall be provided. If less than 3 foot of cover is provided, the sewer shall be backfilled with Control Density Fill (CDF) or Controlled Low Strength Material (CLSM) backfill (with an unconfined compressive strength less than 200 psi) as approved by the Director. Design shall include provisions to prevent floatation of the pipe during CDF or CLSM backfill placement.

2) Sewers crossing streams or drainage channels shall be designed to cross the stream as nearly perpendicular to the stream channel as possible and shall not change of grade at the crossing.

3) Sewers located along streams shall be located outside of the stream bed and sufficiently removed therefrom to provide for future possible stream channel widening. All manhole covers at or below the 100 year flood elevation shall be provided with leak-proof manhole inflow protector lid inserts as specified.

4) Pipe material at crossings shall be Class 50 ductile iron with an 18 foot length of pipe centered on the stream or drainage channel centerline. The ductile iron pipe shall extend to a point where a lH:1V slope from the top of the bank and sloping away from the channel centerline intersects the top of the pipe.

5) Concrete encasement will be required when the above cover requirements cannot be met. Concrete caps in lieu of concrete encasement are not acceptable. Each deviation from the above requirements will be reviewed on a case-by-case basis.

6) The City must be provided with a permit and approval obtained from resource agencies.