Pipeline Aerial Markers shall in general be installed along the pipeline at every Five (5) kilometers intervals and at places specified by Company.

Kilometer Markers shall in general be installed along the pipeline at every One (1) kilometer interval. Markers shall indicate cumulative distance in kilometers from the reference station, as directed by Company. A kilometer marker is not required, if the relative distance between its location and any pipeline warning sign is less than 200 meters and also every 5KM Aerial Marker shall be used instead of Kilometer Marker.

Pipeline Warning Sign shall in general be installed at:

• National and State Highway crossings – 2 Nos. min.
• Other Road crossings – 1 No. min.
• Railway Crossings – 2 Nos. min.
• Minor Water Crossings (less than 15 m width) – 1 No. min.
• Minor Water Crossings (above 15 m width) – 2 Nos. min.
• Major water crossings – 2 Nos. min.
• Valve station – 1 No. min.
• Any other location as shown in the approved drawings and as directed by the Company.

Pipeline Warning Sign shall identify the existence of the pipeline and display the name of the Company, with an emergency telephone number, as shown in Approved Engineering Drawing.

Pipeline Direction Markers shall be installed to identify the significant Turning Points of the pipeline during aerial traverse. One direction marker shall be installed at each Turning Point, two more direction markers shall be installed along the pipeline alignment.

The Navigable Waterway Pipeline Crossing Warning Sign shall be fabricated painted and install in accordance with Approved Engineering Drawing No. 290805-001-6029-A3. Such Warning Sign shall be installed one on each bank of navigable water courses at the pipeline crossing location, in lieu of the Pipeline Warning Sign described in Clause 6.0 of this specification.