(a) Utilities shall cross the aqueduct perpendicular to the centerline of the aqueduct. Exception to this section will only be considered if the crossing does not affect the Department's ability to operate, maintain or modify the aqueduct.

(b) Pier construction in the aqueduct for a new utility crossing(s) is not allowed. New utility crossings shall be ‘Free Span' design or attached to existing structures.

(c) Clearance between encroaching utilities and the top of the existing or future aqueduct lining shall be a minimum of twelve (12) inches. If this minimum clearance is reduced by subsidence or by future departmental modifications to the canal lining, the required minimum clearance shall be re-established at the permittee's cost and expense.

(d) Boring and/or jacking of a utility through protective dikes or aqueduct embankments shall not be permitted.

(e) Directional drilling under an open canal may be considered if a minimum clearance of twenty-five (25) feet is maintained between the casing, or carrier pipe if no casing will be installed, and the bottom of the canal lining. A geotechnical report shall be submitted for review by the Department prior to approval of the proposed utility crossing. Deviations from Section 612.63 (c), Article 6 of these Regulations (regarding casing requirements) may be considered by the Department if the alternate casing will not increase the potential for damage to, or contamination of, State Water Project facilities or right-of-way.

(f) Utilities under the Department's operating roads shall be a minimum of thirty-six (36) inches under the road surface.