§ 11-140. Minimum requirements.

The plans and specifications for proposed storm drainage systems shall be equal to the following minimum standards:

(1)

Pipe:

a.

Reinforced concrete pipe shall conform to AASHTO M 170 for circular pipe and to AASHTO M 206 for arch-shaped pipe. Class III shall be the minimum class of pipe used. The joint seal shall be either cement mortar, three (3) parts sand and one (1) part cement, or cold applied performed plastic gaskets conforming to AASHTO M 198, Type B.

b.

Corrugated steel pipe shall conform to AASHTO M 36, AASHTO M 190 for coated pipe and to AASHTO M 218 for sheets to form pipe. As an alternate to bituminous coated pipe, precoated pipe meeting the requirements of AASHTO M 245 and M 246, for Type B, may be substituted.

c.

The manufacturing and furnishing of corrugated aluminum pipe shall conform to the requirements of AASHTO M 196 and to AASHTO 197 for sheets to form pipe.

d.

Flared end sections shall be of the same material as the pipe for a given installation, except bituminous coating will not be required for metal ends when specified for the pipe. The steel sheets shall have a thickness of 0.064 inches or more.

e.

The reinforced concrete flared end section for circular and arch concrete pipe shall meet the applicable requirements for Class II or higher class of pipe.

f.

Corrugated metal pipe shall be capable of withstanding an H-20 load.

g.

Coupling band for corrugated metal pipe shall be the same metal as used in the pipe and shall be a single or double piece with bolts and angles.

h.

All pipe shall have a minimum cover at subgrade elevation of one (1) foot at the shoulder or curb, unless otherwise approved by the County Road Superintendent.

(Ord. No. 91-9, Art. 1, § 5.01, 4-11-91; Ord. No. 99-32, Art. 1, 7-8-99)