Pursuant to Section 10 of Rate Schedule TF-1, Northwest is required to
Post its Annual Deficiency Volume and Exemption Volume at the end of
each calendar year. Northwest is allowed an Annual Exemption Volume
under that section.
During 2025, Northwest experienced the following Deficiency or
Exemption volumes:
2025 Annual Deficiency Volumes (Dth)
| Constraint Point | Point ID | Deficiency | Design | Exemption | Excess Deficiency |
| Chehalis CS | 241 | 6,206,000 | 672,000 | 7,358,400 | 0 |
| Meacham CS | 182 | 189,000 | 500,000 | 5,475,000 | 0 |
| La Plata B CS | 8 | 243,793 | 243,793 | 2,669,533 | 0 |
| Caldwell CS | 164 | 526,000 | 475,000 | 5,201,250 | 0 |
After calculating the Annual Deficiency Volumes and deducting
Northwest’s Annual Exemption Volumes, there were no Excess Deficiency
Volumes in 2025.
If you have any questions, please call your Commercial Services
Representative or the hotline at 713-215-6301.