Rate Schedule TF-1 Service Agreement Amendment

Contract No. 100010

Dated December 29, 2025, Effective January 01, 2026

 

THIS AMENDMENT by and between Northwest Pipeline LLC (Transporter) and Avista Corporation (Shipper) is made and entered into on December 29, 2025.

WHEREAS:

  1. Transporter and Shipper are parties to that certain Rate Schedule (TF-1) Service Agreement dated December 29, 2025 and assigned Contract No. 100010 (Agreement).
  2. Transporter and Shipper desire to amend the Agreement to reallocate the following MDDOs to facilitate the permanent disconnect of the Page Mine delivery meter:

    (1) Reallocate 15 Dth/day of MDDOs from the Page Mine delivery point to the Pinehurst delivery point.

    (2) Reallocate 15 Dth/day of MDDOs from the Page Mine delivery point to the Smelterville delivery point.

 

THEREFORE, in consideration of the premises and mutual covenants set forth herein, Transporter and Shipper agree as follows:

  1. As of the effective date set forth thereon, the Exhibit A attached hereto supercedes and replaces the previously effective Exhibit A to the Agreement.
  2. The additional exhibits noted on the attached Exhibit A as applicable to the Agreement, if any, also are attached hereto and, as of the effective dates set forth thereon, supercede and replace any previously effective corresponding exhibits to the Agreement.
IN WITNESS WHEREOF, Transporter and Shipper have executed this Amendment as of the date first set forth above.
  
Avista Corporation Northwest Pipeline LLC
By: /S/ By: /S/
Name: KEVIN HOLLAND Name: MARK MOHAN
Title: Director Energy Supply Title: MGR COMMERCIAL

 

EXHIBIT A

Dated December 29, 2025, Effective January 01, 2026

to the

Rate Schedule TF-1 Service Agreement

(Contract No. 100010)

between Northwest Pipeline LLC

and Avista Corporation

SERVICE DETAILS

  1. Transportation Contract Demand (CD): 157,961 Dth per day
  2. Primary Receipt Point(s):
      Point ID Name Maximum Daily Quantities (Dth)    
      4 IGNACIO PLANT 11,029    
      75 CLAY BASIN RECEIPT 9,365    
      80 GREEN RIVER GATHERING 15,418    
      297 SUMAS RECEIPT 77,801    
      401 STARR ROAD RECEIPT 9,429    
      543 OPAL PLANT 21,337    
      556 BLANCO HUB-MILAGRO (56419) 13,582    
      Total157,961
  3. Primary Delivery Point(s):
      Point ID Name Maximum Daily Delivery Obligation (Dth)   Delivery Pressure (psig)  
      179 NORTH POWDER120 150    
      180 UNION590 150    
      181 LA GRANDE5,440 200    
      188 STANFIELD DELIVERY11,960 150    
      204 GOLDENDALE850 150    
      212 STEVENSON #2240 150    
      213 STEVENSON240 150    
      343 OAKLAND100 150    
      345 SUTHERLIN/OAKLAN320 150    
      347 WINCHESTER100 150    
      351 ROSEBURG4,129 150    
      353 WINSTON/DILLARD1,070 150    
      355 ROUND PRAIRIE(ROSEBURG LUMBER)1 150    
      359 MYRTLE CREEK/RIDDLE1,120 150    
      361 CANYONVILLE250 150    
      366 GRANTS PASS18,060 300    
      375 CONNELL850 150    
      377 LIND100 150    
      379 RITZVILLE650 150    
      380 KEYSTONE50 150    
      381 SPRAGUE100 150    
      382 CHENEY (MEDICAL LAKE)2,400 150    
      383 SPOKANE WEST5,600 350    
      385 SPOKANE MEAD44,549 350    
      403 MCGUIRE2,000 150    
      404 POST FALLS2,000 250    
      409 WARDEN1,000 150    
      416 ENDICOTT200 150    
      417 COLFAX1,226 150    
      418 PALOUSE/ALBION305 150    
      419 PULLMAN6,000 150    
      420 MOSCOW7,400 150    
      421 COLTON61 150    
      422 UNIONTOWN80 150    
      423 GENESEE68 150    
      424 LEWISTON W.4,269 150    
      425 LEWISTON E.7,000 150    
      426 LEWISTON PFI4,000 150    
      522 COEUR D'ALENE W.6,000 150    
      523 COEUR D'ALENE E. (HAYDEN)4,999 150    
      524 PINEHURST495 150    
      527 SMELTERVILLE177 200    
      528 KELLOGG4,126 250    
      718 NINE MILE FALLS17,179 375    
      Total167,474  
    Specified conditions for Delivery Pressure, pursuant to Section 2.4 of the General Terms and Conditions: None
  4. Customer Category:
    1. Large Customer
    2. Incremental Expansion Customer: No
  5. Recourse, Discounted Recourse, or Negotiated Rate Transportation Rates:

    (Negotiated Rates are on Exhibit D if attached.)

    1. Reservation Charge (per Dth of CD): Maximum Base Tariff Rate, plus applicable surcharges
    2. Volumetric Charge (per Dth): Maximum Base Tariff Rate, plus applicable surcharges
    3. Additional Facility Reservation Surcharge Pursuant to Section 3.4 of Rate Schedule TF-1 (per Dth of CD): None
    4. Rate Discount Conditions Consistent with Section 3.5 of Rate Schedule TF-1: Not Applicable
    5. Negotiated Rate Conditions Consistent with Section 3.7 of Rate Schedule TF-1: Not Applicable
  6. Transportation Term:
    1. Primary Term Begin Date: November 01, 1992
    2. Primary Term End Date: October 31, 2035

      Specified conditional service agreement extensions pursuant to Section 11.9 of the General Terms and Conditions of the Tariff: None

    3. Evergreen Provision: Yes, grandfathered unilateral evergreen under Section 12.3 of Rate Schedule TF-1
  7. Contract-Specific OFO Parameters and/or Alternative Actions in lieu of a Contract-Specific OFO:

    In accordance with Transporter s Path-Shortening Policy, Transporter and Shipper have agreed to the following Alternative Actions in lieu of a CSOFO due to the point amendment from Lewiston PFI to River Road on Shipper s Replacement Agreement 144135 that vacated 10,000 Dth/d of northbound displacement capacity on the Spokane Lateral ( Vacated Capacity ).Alternative Action Associated with Shipper s Must-flow OFO Obligations:In the event Transporter is unable to subscribe all or a portion of the Vacated Capacity on the Spokane Lateral during the primary term associated with Shipper s Replacement Agreements 144134 and 144135 ( Replacement Agreements ), Shipper agrees to submit amendment requests, at least ninety (90) days in advance of the capacity coming available, on the Replacement Agreements to amend the delivery points back to their original delivery points, unless Transporter agrees to other alternative actions to protect displacement on the Spokane Lateral. One such alternative action could include Shipper acquiring the Vacated Capacity on the Spokane Lateral on a new Service Agreement.During the term this alternative action is in effect, the OFO recall provision pursuant to 10(a)(iii) of the Replacement Agreements will not apply if Transporter issues an OFO at the Plymouth South Constraint Point, or the Roosevelt, Goldendale, Willard and Washougal compressor stations along the Columbia River Gorge or the Mesa compressor station on the Spokane Lateral, since (1) the Vacated Capacity on the Spokane lateral will be subscribed by an third party which would result in the Spokane Lateral being oversubscribed if recalled, (2) the amended capacity on the Columbia River Gorge needs to remain in this corridor to support the must-flow displacement requirements on a southbound gas day, and (3) the available capacity used for the amendment along the Columbia River Gorge isn t subject to a Realignment OFO.Alternative Action Associated with Shipper s Realignment OFO Obligations:During the period the Alternative Actions Associated with Shipper s Must-flow OFO Obligation is in effect, if Transporter declares an OFO at its Mesa compressor station on a southbound gas day, Shipper will have to provide up to 2,658 Dth/d as a CSOFO to the extent its scheduled quantities are less than 9,429 Dth/d northbound through the Mesa compressor station or at the Starr Road receipt point.

  8. Subordinate rights apply as defined in GT&C Section 1 Secondary Firm Service Rights with a Scheduling and Curtailment Priority per GT&C Section 12.1(b)(ii): No
  9. Regulatory Authorization: 18 CFR 284.223
  10. Additional Exhibits:

    Exhibit B Yes

    Exhibit C No

    Exhibit D No

    Exhibit E No

EXHIBIT B

Dated December 29, 2025, Effective January 01, 2026,

 

(subject to Commission acceptance)

to the

Rate Schedule TF-1 Service Agreement

(Contract No. 100010)

between Northwest Pipeline LLC

and Avista Corporation

 

NON-CONFORMING PROVISIONS

Measurement Location

The following provision was accepted as non-conforming by the Commission on March 28, 2007 in Docket No. RP07-365.

The following provision clarifies the measurement location for certain farm tap delivery points formerly listed on the Agreement with zero MDDO and a note indicating the measurement location: Spokane Mead delivery point is also the measurement point for downstream
delivery points to Kenneth L. Byford Farm Tap, Christian School Farm Tap, Orville Coch Farm Tap, Roy Cutler Farm Tap, Flesland Farm Tap, J.T. Grant Farm Tap, William Meyers Farm Tap, Mount Saint Michaels Farm Tap, Newman Lake Farm Tap, John Preston Farm Tap, Fred Rogers Farm Tap, Scheel Farm Tap, Roy Simmons
Farm Tap, WWP Farm Tap.

Columbia River Gorge Primary Rights

The following provision was accepted as non-conforming by the Commission on November 08, 1996 in Docket No. GT97-5.

The following provision was instituted by the March 6, 1995 Amendment to replace contract specific OFO provisions associated with incorporating former contract #F-01 into Contract #100010:
Shipper will have firm transportation corridor rights of 59,896 MMBtu per day eastbound through the Columbia River Gorge and 12,996 MMBtu/d westbound through the Columbia River Gorge.