Downstream Pipe Balancing Service (DPBS)

Looking for a short-term, short notice balancing service at Parkway or Kirkwall?

DPBS is a balancing service designed for shippers who have short notice delivery requirements (15 minutes notice) at Parkway/Kirkwall.

This service may be purchased on a stand-alone basis, or may be used in conjunction with an existing storage contract with firm injection/withdrawal parameters. DPBS allows shippers to submit electronic nominations on a short notice basis, and ensure that their gas supplies closely match their consumption requirements on a 15 minute basis. DPBS provides shippers with up to six hours of balancing service at Parkway/Kirkwall. The use of DPBS allows shippers to minimize downstream balancing costs.


Service Highlights

  • Firm, short notice (15 minutes) intraday balancing service providing a park and loan service at Parkway/Kirkwall
  • Submit electronic nominations for up to 96 notice periods for changes to activity at Parkway or Kirkwall (ability to increase or decrease net exports to TransCanada)
  • Shipper can export to TransCanada a total quantity equal to its maximum hourly transportation demand. The source of the export can be flowing transportation gas from Dawn, or a withdrawal from DPBS
    • Example:
      • Daily firm transportation contract = 100,000 GJ/d
      • Hourly transportation demand = 5,000 GJ/h (100,000 GJ/d divided by 20)
      • Daily firm storage withdrawals = 100,000 GJ/d
      • Hourly storage contract withdrawal demand is 5,000 GJ/h (100,000 GJ/d divided by 20)
      • Total flowing gas on M12 Dawn to Parkway contract at 11:00am = 2,000 GJ/h
      • Total withdrawal from storage contract (at Dawn) at 11:00 am = 0
      • Maximum DPBS withdrawal available from 11:00 am to 12:00 pm = 3,000 GJ/h (5,000 GJ/h transport limit less 2,000 GJ/h flowing gas)
  • Shipper can reduce its exports to TransCanada and inject into DPBS
    • Example:
      • Use same storage and transportation parameters as above
      • Total flowing gas on M12 to Parkway contract as 11:00 am = 2,000 GJ/h
      • Total injection to storage contract (at Dawn) at 11:00 am = 0GJ/h
      • Maximum DPBS injection available from 11:00 am to 12:00 pm = 2,000 GJ/h (equal to 2,000 GJ/h of flowing gas on transport)
  • Hourly DPBS quantity determined as lesser of hourly transport demand and hourly storage withdrawal demand
  • Shipper submits an hourly profile which specifies the net deliveries to TransCanada for each hour (by 15 minute segment)
  • Balance account limits:
    • Maximum upper limit (storage limit)- plus three times hourly DPBS quantity
    • Maximum lower limit (loan limit)- negative three times hourly DPBS quantity
  • No requirements to reduce balance to zero at any time
  • Shippers are billed monthly for all demand charges
  • Overrun of DPBS (and underlying storage contract) may be provided. Any overrun of an hourly quantity will be considered overrun for the entire gas day


NOTE: above service description based on use of DPBS in conjunction with an existing storage contract. Service parameters vary if using stand alone DPBS offering

Receipt & Delivery Points

  • Parkway or Kirkwall

Pricing & Fuel

  • Negotiated price
  • No incremental fuel charges (notwithstanding commodity charges required as per underlying storage and transportation contract)
  • No incremental commodity or variable charges
  • Overrun charges equal to 1.5 times underlying demand storage demand charges


  • Schedule added to existing executed storage contract
  • Assignable to third parties with a firm storage contract on a temporary or permanent basis. View our standard storage assignment agreement

Contract Term

  • Varying length from one storage season to ten years

Service Eligibility

  • Available to shippers outside of Union Gas' distribution area. Intended to supply shippers who use firm transport short notice (FT-SN) service on TransCanada
  • Available to all shippers who hold a firm Dawn to Parkway/Kirkwall transportation contract
  • Term of transportation contract must be equal to or longer than term of DPBS contract
  • Hourly quantity of firm transport (daily quantity divided by 20) must be equal to or greater than quantity of DPBS contract

Complementary Services

  • F24-T (firm all day transport)
  • F24-S (firm all day storage)
  • UPBS (upstream pipeline balancing service)

How to Request Service

Hub Contract Application Form
Contact your account manager.
Learn more

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