Rates and Services
Contract Demand (CD)
The maximum daily quantity of gas a customer contracts to receive each day, measured in cubic meters per day (m³/day).
Daily Contract Quantity (DCQ) / Obligated DCQ
A fixed daily volume of gas a customer agrees to deliver to Enbridge Gas for the term of the contract. Used primarily in Bundled and Semi-unbundled Direct Purchase services to meet planned annual consumption; measured in gigajoules per day (GJ/day)
Non-Obligated Deliveries
Deliveries that customers using unbundled service make on a non-fixed, planned basis, often used by very large customers (e.g., power generators), reflecting actual daily needs rather than a fixed DCQ.
Storage Allocation Methodology
The method used to determine a customer’s cost-based allocation of storage space and storage injection/withdrawal rights as defined in the applicable rate schedule.
Unbundled Balancing Service (UBS)
A harmonized balancing service used under unbundled service that encompasses daily and cumulative balancing limits, replacing previous balancing account types across rate zones to provide standardized operational and financial controls.
Firm Service
A type of gas distribution service guaranteed with minimal interruptions, except for force majeure events or planned maintenance. Customers must meet minimum CD requirements to qualify.
Interruptible Service
A distribution service subject to curtailments or interruptions during system constraints. Customers must be able to reduce gas consumption when notified.
Seasonal Firm Service
A firm service tailored for customers whose gas demand is seasonal, enabling them to contract lower demand during off-peak months (typically December to March), with operational constraints on winter usage.
Zones and Points of Receipt
Rate Zones
Geographical areas governed by specific rate schedules:
- Central: EGD + Union North EDA
- North: Union North West + Union North East (except Union North EDA)
- South
Point of Receipt
Designated physical locations where customers deliver their DCQ to Enbridge Gas. Common points include:
- Dawn Hub
- Empress
- Parkway
- Enbridge Central Delivery Area (ECDA)
Bundled Distribution Service
A distribution service that combines the delivery of the gas molecule with associated transportation or delivery services as a single integrated package. Customers may either:
- Purchase gas directly from Enbridge under a Sales Service arrangement, or
- Supply their own gas through a Bundled Direct Purchase Service option, while still receiving bundled delivery and transportation services from Enbridge.
Bundled Sales Service
A service in which Enbridge supplies the gas commodity and delivers the related distribution or transportation services, while handling the procurement, transportation, and delivery processes on the customer's behalf.
Bundled Direct Purchase (DP) Service
A service where a customer or their agent supplies a fixed daily quantity of natural gas at designated points to meet annual consumption needs. The service includes delivery of gas supply, balancing, and associated charges.
Semi-Unbundled Service
A combination of distribution and DP service where customers supply a fixed quantity of natural gas at designated points and manage an allocation of storage with deliverability to meet their consumption needs.
Unbundled Service
Service where customers manage all aspects of gas supply including balancing and storage where appliable to meet daily consumption, offering greater operational flexibility but increased customer responsibility.
Banked Gas Account (BGA)
An account that tracks the differences between the gas delivered and measured consumption.
Compliance and Penalty Charges
Compliance Charges
Charges applied to customers when they fail to comply with contract terms such as exceeding contract parameters, failing to deliver contracted quantities, or not complying with interruption notices.
Demand Overrun
Occurs when a customer's actual daily consumption exceeds 103% of their total contracted firm, interruptible, and/or seasonal CD. Overrun can be authorized or unauthorized, with charges applied accordingly.
Interruption Non-Compliance Charge
A charge to customers who do not curtail gas consumption after an interruption notice is issued.
Checkpoint Balancing Obligations
Specific balancing requirements at designated times (e.g., end of February and September) during the contract year to ensure customers maintain their BGA within set limits.
Failure to Deliver Charge
A charge applied when a customer fails to deliver the obligated DCQ, calculated based on the higher of a relevant spot price or 150% of the Enbridge Gas reference price.
Failure to Balance a Supply Shortfall at Winter Checkpoint (End of February)
A charge applied when a customer fails to meet their winter checkpoint obligation, meaning their Banked Gas Account (BGA) balance is below the required value by the end of February.
Failure to Balance an Excess Supply at Fall Checkpoint (End of September)
A charge applied when a customer fails to meet their fall checkpoint obligation, meaning their Banked Gas Account (BGA) balance is greater than the required value by the end of September.
Unauthorized Storage Overrun Charge
A charge applied when a customer’s storage level goes above the contracted maximum or below the contracted minimum, Unauthorized Storage Overrun applied to the greatest excess for each occurrence.
Unauthorized Storage Injection/Withdrawal Overrun Charge
A charge applied when a customer injects gas into or withdraws gas from storage beyond their contracted limits without authorization.
Contract and Operational Terms
Pool Consolidation
The combination of multiple pools with common points of receipt to simplify contract administration while maintaining accounting and operational integrity.
Checkpoint Balancing Obligations
Specific balancing requirements at designated times (e.g., end of February and September) during the contract year to ensure customers maintain their BGA within set limits.
Operational Status and Notices
Traffic Light
A four-day outlook for each specific path on the transportation system that provides up-to-date information on the status of system constraints, using a color-coding system of green, yellow, and red to indicate operating conditions and levels of risk.
Green: No capacity constraints
Yellow: Interruptible services potentially impacted.
Red: Firm services impacted.
Priority of Service (POS)
To prioritize reductions and service restrictions for Enbridge's services during periods when Enbridge's ability to flow interruptible gas quantities are less than the requested/forecasted quantities.
Transaction Types Related to Balancing
In-Franchise Transfers (IFT)
Transactions that allow a customer to transfer excess gas from one pool to another pool.
Ex-Franchise Transfers (EFT)
Transactions that allow a customer to sell excess gas from their BGA or storage account to the market, subject to interruption based on Enbridge Gas’s daily operational capability.
Incremental Supply
Transactions that allow a customer to deliver additional gas from the market to the BGA or storage account, subject to interruption based on Enbridge Gas’s daily operational capability.
Suspensions
Transaction that allows customers to temporarily reduce their DCQ deliveries, subject to interruption based on Enbridge Gas’s daily operational capability.
Backstop Supply
Short-term gas supply service provided by Enbridge Gas to customers unable to procure gas at market prices, subject to availability and credit.
Storage and Loan Transactions
Options allowing customers to store excess gas or borrow gas from Enbridge Gas at market prices, subject to availability and credit.
Specialized Customer Services
Parkway Delivery Commitment Incentive (PDCI)
A payment to customers obligated to deliver gas at Parkway and/or ECDA to recognize the benefit of those deliveries to the Dawn-Parkway transmission system.
