Statutes, codes, and regulations
North Dakota Administrative Code
Title 37 - Department of TransportationArticle 89-14 - Stream Crossings [Rules adopted jointly with Water Commission and published in Article 89-14]
Chapter 89-14-01 - Stream Crossing Design
Section 89-14-01-03 - Design flood frequency

N.D. Admin. Code 89-14-01-03

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Current through Supplement No. 394, October, 2024
Section 89-14-01-03 - Design flood frequency

The following table provides the recurrence interval of the event for which each type of crossing must be designed.

This represents a minimum design standard. Nothing contained in this chapter is intended to restrict the road authority from providing greater capacity.

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1Discharges shall be computed using the rational method or other recognized hydrologic methods.

2Discharges shall be computed using United States geological survey report 92-4020 or other recognized hydrologic methods.

3If an overflow section is provided, the pipes and the overflow section, in combination, must pass the appropriate design event within the headwater limitations provided in this chapter.

4Off system roads include all township roads.

5For township roads, the recurrence interval is 10 years.

N.D. Admin Code 89-14-01-03

Effective May 1, 2001; amended effective July 27, 2001.

General Authority: NDCC 24-02-01.1, 24-02-01.5, 28-32-02, 61-03-13

Law Implemented: NDCC 24-03-06, 24-03-08, 24-06-26.1