La. Admin. Code tit. 43 § XV-5435

Current through Register Vol. 50, No. 11, November 20, 2024

Section XV-5435 - Primary Roads

A. Primary roads shall meet the requirements of §5433 and the additional requirements of this Section.

1. Certification. The construction or reconstruction of primary roads shall be certified in a report to the office by a qualified, registered professional engineer. The report shall indicate that the primary road has been constructed or reconstructed as designed and in accordance with the approved plan.

2. Safety Factor. Each primary road embankment shall have a minimum static factor of 1.3 or meet the requirements established under §2737 C

3. Location

a. To minimize erosion, a primary road shall be located, insofar as is practicable, on the most stable available surface.

b. Fords of perennial or intermittent streams by primary roads are prohibited unless they are specifically approved by the office as temporary routes during periods of road construction.

4. Drainage Control. In accordance with the approved plan:

a. each primary road shall be constructed, or reconstructed, and maintained to have adequate drainage control, using structures such as, but not limited to, bridges, ditches, cross drains and ditch relief drains. The drainage control system shall be designed to safely pass the peak runoff from a 10-year, 6-hour precipitation event, or greater event as specified by the office;

b. drainage pipes and culverts shall be installed as designed, and maintained in a free and operating condition and to prevent or control erosion at inlets and outlets;

c. drainage ditches shall be constructed and maintained to prevent uncontrolled drainage over the road surface and embankment;

d. culverts shall be installed and maintained to sustain the vertical soil pressure, the passive resistance of the foundation, and the weight of vehicles using the road;

e. natural stream channels shall not be altered or relocated without the prior approval of the office in accordance with applicable §5319-5323 and 5349;

f. except as provided in §5435. A.3.b structures for perennial or intermittent stream channel crossings shall be made using bridges, culverts, low-water crossings, or other structures designed, constructed and maintained using current, prudent engineering practices. The office shall ensure that low-water crossings are designed, constructed and maintained to prevent erosion of the structure or streambed and additional contributions of suspended solids to streamflow.

5. Surfacing. Primary roads shall be surfaced with material approved by the office as being sufficiently durable for the anticipated volume of traffic and the weight and speed of vehicles using the road.

La. Admin. Code tit. 43, § XV-5435

Promulgated by the Department of Natural Resources, Office of Conservation, LR 5:395 (December 1979), amended LR 14:441 (July 1988), LR 20:447 (April 1994).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:901-932.