(b) Gas and liquid petroleum pipelines.

1. (1) Only distribution lines providing natural gas service are permitted longitudinally within the highway right-of-way.
2. (2) Crossings for gas or liquid petroleum pipelines may be encased or uncased.

3. (3)

   1. (A) One (1) or more vents shall be provided for each encasement pipe or series of encasement pipes.
   2. (B) For encasement pipes longer than one hundred fifty feet (150’), vents shall be provided at both ends.
   3. (C) On shorter encasement pipe, a vent should be located at the higher end with a marker placed at the lower end.
   4. (D) Vents shall be placed at the right-of-way line immediately above the pipeline, situated to not interfere with highway maintenance or be concealed by vegetation.
   5. (E) Ownership of the lines shall be clearly shown on a sign attached to the vent pipe.
4. (4) Markers bearing the name of the utility owner shall be placed at each right-of-way line where gas or petroleum lines cross except where marked by a vent.

(c) Waterlines.

1. (1) Only water service lines, including crossings, owned and maintained by the utility owner shall be installed within the highway right-of-way.
2. (2) Crossings for waterlines, including services, must be encased.
3. (3) Markers bearing the name of the utility owner shall be placed at each right-of-way line where a waterline two inches (2”) or larger in diameter crosses.
4. (4) In open shoulder areas, fire hydrants or blow-off valves shall be placed as near to the right-of-way line as practicable but shall not be placed in the roadway cross section.
5. (5) In curbed roadway areas, fire hydrants shall be placed as near to the right-of-way line as practicable but shall not be placed closer than five feet (5’) to the curb.

(d) Sanitary sewer lines.

1. (1) Only sewer lines, including crossings, owned and maintained by the utility owner shall be installed within the highway right-of-way.
2. (2) Sewer lines operated under pressure (force mains) and those composed of materials not conforming to material or depth of cover requirements of this part shall be encased.
3. (3) Markers bearing the name of the utility owner shall be placed at each right-of-way line where a sewer line six inches (6”) or larger in diameter crosses.
4. (4) Gravity flow sewer lines installed by open trench across proposed highway construction areas or lines bored across existing highways will not require encasement if other conditions of this part are met.

5. (5)

   1. (A) Manholes for sewer line crossings should be placed outside the highway right-of-way.
   2. (B) If placement outside the highway right-of-way is not practicable, manholes may be placed in the highway right-of-way provided they are located at or near the right-of-way line and out of drainage ditches.

(e) Underground electric lines.

1. (1)

   1. (A) Underground electric line crossings shall be encased.
   2. (B) An existing facility may be allowed to remain in place under roadways if suitable bridging, concrete slabs, extra depth, or other appropriate measures are used for protection.
2. (2) Markers bearing the name of the utility owner shall be placed at each right-of-way line where underground electric lines cross, regardless of size.

3. (3)

   1. (A) Vaults for underground electric facilities should be placed outside the highway right-of-way, if practicable.
   2. (B) If placement outside the highway right-of-way is not practicable, the following shall apply:

(i) Only straight-line vaults shall be allowed;

1. (ii) Vault dimensions shall be limited to that necessary for equipment and to ensure safety standards for maintenance personnel; and

   1. (iii) The top of the vault shall be buried a minimum of four feet (4’) below the ground surface.

(f) Underground communications lines.

1. (1) Underground communications line crossings may be uncased unless the District Engineer determines encasement or other suitable protection is necessary for the protection of the highway facility under the following conditions:

   1. (A) The minimum depth cannot be attained;
   2. (B) The installation is near a bridge or other highway structures; or
   3. (C) The installation is near other hazards.

2. (2)

   1. (A) When underground communications line crossings are installed by boring, the hole shall be approximately the same diameter as the line and encasement will not be required.
   2. (B) If a hole approximately the same diameter as the line cannot be bored, an encasement shall be provided.
   3. (C) The void remaining between the line or encasement and the outer limit of the bored hole shall be filled with a material suitable to prevent settlement of any part of the highway facility over the line.
3. (3) Markers bearing the name of the utility owner shall be placed at each right-of-way line where a carrier line or fiber optic line crosses.

(g) Fiber optic telecommunication lines within the control of access.

1. (1)

   1. (A) Fiber optic telecommunication lines may be installed longitudinally within the control of access on fully controlled access highways only by execution of a shared resource agreement between the utility owner and the Arkansas Department of Transportation.
   2. (B) All conditions for longitudinal installations elsewhere in this part shall apply.
2. (2) The utility owner shall not access the work area directly from the main lanes and ramps, except at locations specifically approved by the District Engineer.
3. (3) At locations where the control of access does not coincide with the right-of-way line, fiber optic telecommunication lines may be installed parallel to the control of access line with the same requirements as for placement along the right-of-way line.
4. (4) Fiber optic telecommunication lines shall not be installed parallel to the main lanes between the main lanes and ramps.