§ 21-232. Crossings.

(a)

General considerations. The normal crossing under paved surfaces will be made without cutting the pavement. Pavement cuts will be considered only under unusual conditions and permission must be specifically granted on the permit. The primary consideration in evaluating results for any open street cuts will be the safety and convenience of the public.

(1)

The minimum depth of cover shall be thirty-six (36) inches from the top of the pipe to the existing and/or proposed surface, unless otherwise directed by the county engineer.

(2)

Any deviation from approved materials, location, or operation, shall be grounds for stopping work, directing the plugging of the line with concrete, and restoring the area.

(3)

Jetting or tunneling is prohibited.

(b)

Subterranean crossings. Subterranean crossings shall be subject to the following:

(1)

All subterranean crossings of a traveled way, thirty (30) feet or more in width, shall require a tracked type bore and jack, with encased auger. Crossings of traveled ways less than thirty (30) feet may be made by boring, jacking, pushing, pulling, driving or some combination of these, having a positive horizontal and vertical control. Pits required for these crossings must be constructed no closer than six (6) feet from the edge of the traveled way.

(2)

Closed end jacking may be permitted for pipe with a maximum outside diameter of three (3) inches. The pipe shall extend six (6) feet beyond the edge of the travelled way.

(3)

All other pipe must be jacked with the end open or bore and jacked and extend a minimum of six (6) feet beyond the edge of travelled way or as directed by the county engineer.

(4)

If mechanical boring is used, the tip of the drill head shall not precede the end of the pipe by more than two (2) inches.

(5)

All such crossings shall be a continuous operation and be completed, and the pits backfilled prior to ceasing the operation.

(c)

Open street cuts. Open street cuts shall be subject to the following:

(1)

Traffic maintenance. As a general rule, a minimum of one (1) lane of traffic must be maintained at all times and adequate safety precautions taken. Any street closures will require a traffic plan submitted at least fourteen (14) days in advance of the proposed closure and approved by the county engineer. If a detour is contemplated, the complete detour route must be indicated. Inclusive dates of the proposed closure must be firm.

a.

Prior to closing the street to traffic, the appropriate police and emergency (rescue, fire, etc.) agencies shall be notified. In addition, the county traffic engineer and county school bus superintendent shall be notified.

b.

Traffic-control devices in accordance with the Manual on Traffic Control and Safe Practices shall be installed and approved by the engineering inspector prior to starting work.

(2)

Restoration of right-of-way. Restoration of the right-of-way will be in accordance with the county road construction specifications and the permit requirements. Appendices G through L contained in this article as well as in the county road construction specifications, and incorporated by reference into the Code, are furnished for information and guidance.

(d)

Restoration of sidewalks, concrete curb, driveways, etc. The restoration of sidewalks, concrete curb, driveways and similar items shall be subject to the following:

(1)

Repair of these items requires that a saw cut be made at a joint and all concrete within the area be removed and replaced to a condition equal to or better than existing at the commencement of construction, with like material.

(2)

Asphaltic concrete shall be repaired or replaced by saw cutting the asphalt and base for the entire width and replacing the base and asphalt in accordance with the open street cut requirements. In the event of longitudinal driveway cuts, a minimum width of thirty-six (36) inches shall be restored or as directed by the engineering inspector.

(e)

Canals and ditches. Canals and ditches shall be subject to the following:

(1)

The minimum depth of cover for crossings under facilities identified as part of the county's primary drainage system, and county engineer approved secondary facilities, which are of comparable size to the primary facilities, shall be sixty (60) inches from the top of the pipe to the design or existing, actual canal or ditch bottom elevation, whichever results in the greater cover over the crossings. The minimum depth of cover for crossings, under all other canals and ditches, shall be thirty-six (36) inches from the top of the pipe to the design or existing, actual canal or ditch bottom elevation, whichever results in the greater cover over the crossings.

(2)

The minimum vertical distance for crossings over any waterways shall be twenty-four (24) inches from the bottom of the pipe to the existing one-hundred-year floodplain elevation. The twenty-four-inch minimum vertical distance shall be implemented for the length of the crossing from the top-of-bank to top-of-bank. The crossing shall not increase the existing one-hundred-year flood elevation. A childproof barrier shall be required for crossings over waterways. The crossing shall not impede maintenance equipment or maintenance operations of the waterways.

(Right-of-Way Utilization Regs., § XII; Ord. No. 91-13, §§ 11, 12, 5-21-91)