Mid-Continent Fractionation & Storage

Conway East:

  • Rail dock is capable of spotting 30 rail cars at once. The automated truck dock simultaneously can service six trucks – four loading and two unloading.
  • Connects to eight pipelines
  • 70 active caverns


  • 30 active caverns with flow rates of ethane propane mix at 5,000 barrels and propane at 3,000 barrels per hour
  • Connected to Conway West with a 10-inch propane line, a 16-inch ethane/propane line and a 12-inch brine line

Conway West:

  • 52 active caverns, some with 20-inch casing, were designed to handle the high flow rates needed to service the Conway hub

Conway Fractionator:

  • Sits adjacent to Conway West and is jointly owned by Williams Partners, L.P., ConocoPhillips and ONEOK
  • Operated by Williams
  • Receives liquid demethanized mix from Oklahoma, Colorado, Texas, New Mexico and Wyoming
  • Process separates the demethanized mix into its five components by thermal distillation: ethane/propane mix, propane, isobutane, normal butane and natural gasoline
  • These purity products are either stored in an underground cavern or moved to one of the pipelines located in the area and transported to a petrochemical facility

Hutchinson Rail Facilityhutchrail

  • Rail loading terminal for handling normal butane, iso butane, propane, refinery grade butane, natural gasoline and propane/propylene mix.
  • The facility is located adjacent to the BNSF railroad in the south eastern part of Hutchinson Kansas
  • 5 rail tracks used for staging up to 150 rail cars
  • 8 spot rail loading rack
  • 22 storage vessels

Store Product

Williams is one of the leading NGL storage providers in the United States. Customers use our storage to stage product. For more information on our storage policies, pricing and locations, please email.

Product Specification Fact Sheets

Williams maintains NGL product quality standards to help ensure safety, integrity and operational efficiencies. See our detailed specification fact sheets below.  The date in the lower right corner of each fact sheet indicates when the fact sheet was last updated.

Load and Unload Product

Williams provides the ability to efficiently load and unload certain products.

Driver Loading Program

Terminals on the Conway system are designed and equipped so drivers can load and unload motor carrier transports. Drivers must be trained at each terminal.