Identifying Pipelines
The pipeline right-of-way must be kept clear of any buildings, structures, trees, shrubs, excess vegetation, fence posts, electric / telephone poles, or other encroachments which might damage and restrict access to the pipeline. The right-of-way protects the public and the pipeline. If you notice any possible encroachments to MarkWest pipeline right-of-way, or if you need to install a structure near the right-of-way, please call the state One-Call Centers.
| National Call Before You Dig Number 811 | |
| Kentucky | (800) 752-6007 |
| West Virginia | (800) 245-4848 |
| Michigan | (800) 482-7171 |
| New Mexico | (800) 321-ALERT |
| Ohio | (855) 878-4859 |
| Oklahoma | (800) 522-6543 |
| Texas | (800) 245-4545 |
| Pennsylvania | (800) 242-1776 |
Pipeline markers are located along the right-of-way to help identify the approximate location of the pipeline. MarkWest pipeline markers list the commodity transported and the 24-hour telephone number where a person monitoring our pipeline can be reached at any time.
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If you know of a damaged or missing pipeline marker, or have seen someone damage / vandalize our markers, please report it to MarkWest.
| MarkWest Emergency Numbers by State | |
| Kentucky | (877) 675-9378 |
| Michigan | (866) 342-6914 |
| New Mexico | (800) 852-9225 |
| Ohio | (855) 878-4859 |
| Oklahoma | (800) 852-9225 |
| Pennsylvania | (866) 342-6914 |
| Texas (East Texas) | (800) 677-6360 |
| Texas (Pinnacle) | (800) 852-9225 |
| West Virginia | (877) 675-9378 |
It's against the law for any person to willfully and knowingly deface, damage, remove, or destroy any pipeline sign
or right-of-way marker.
