§ 19-406. Subdivision design standards: Easements.

A.

The subdivider shall dedicate to the public appropriate easements to the end that each and every lot, piece, or parcel of land within a subdivision shall have access to all utilities authorized by the City of Norman.

B.

Where alleys are not provided, easements not less than ten (10) feet wide shall be provided along the rear of each lot and along side lot lines, where necessary, for use by authorized utilities. Aerial easements and easements of greater width for either the extension of main storm and sanitary sewers and other utilities or the accommodation of utilities in unique situations such as, but not limited to, lots rearing onto unplatted land may be required where it is deemed necessary on advice of the Public Works Director.

C.

Where a subdivision is traversed by a water course, drainage channel, or stream, there shall be provided a right-of-way and access thereto for drainage, public parks, and public utility purposes.

D.

Pipe lines carrying petroleum products shall be located in a dedicated easement.

1.

Pipelines with a length greater than two miles will require an easement of not less than fifty (50) feet in width. The required easement may be greater than fifty (50) feet on the advice of the Public Works Director.

2.

Pipelines carrying petroleum products from the well head to a tank battery or major pipeline will require a separation from a habitable structure no less then twenty-one and one-half (21.5) feet. When the concentration of Hydrogen sulfide gas exceeds three hundred parts per million (300 ppm) a separate hazards analysis will be required to determine the required separation. If the concentration of natural gas in the pipeline exceeds the amount carried in a four (4) inch pipe at sixty pounds per square inch (60 psi), the separation will be calculated using the formula w=0.69 × Sq root (y × p × d ). Where w is the minimum separation in feet, p is the maximum rated pressure of the line in pounds per square inch, y is the weight fraction of natural gas in the pipeline, and d is the diameter of the line in inches.

E.

In all subdivisions located in the A-1 and A-2 Agricultural Districts and in the R-E, Residential Estate Dwelling District, utility and drainage easements having a minimum width of twenty-five (25) feet shall be provided adjacent to and outside of the designated right-of-way of all dedicated and private streets.

(Ord. No. O-7272-87; Ord. No. 0-0001-15; Ord. No. 0-0506-40)