Mason County, Washington — Interconnection Projects
The interXdata warehouse tracks 27 interconnection projects in Mason, Washington, representing 864 MW of requested capacity.
27Total projects
3Active
19Operational
5Withdrawn
864 MWRequested capacity
Technology mix
| Technology | Projects | Requested capacity |
|---|---|---|
| Wind | 1 | 300 MW |
| Other | 23 | 268 MW |
| Solar | 1 | 200 MW |
| Gas | 2 | 96 MW |
Projects
| Project | Queue ID | Technology | Capacity | Status | Location |
|---|---|---|---|---|---|
| WA Queue Project G0973 — Wind in Mason, Washington | G0973 | Wind | 300.0 MW | withdrawn | Mason, Washington |
| WA Queue Project G1048 — Solar in Mason, Washington | G1048 | Solar | 200.0 MW | active | Mason, Washington |
| WA Queue Project G0378 — Gas in Mason, Washington | G0378 | Gas | 65.0 MW | withdrawn | Mason, Washington |
| Clifton Ridge | L0469 | Other | 40.0 MW | withdrawn | Mason, Washington |
| Belfair Substation | L0504 | Other | 38.3 MW | operational | Mason, Washington |
| WA Queue Project G0426 — Gas in Mason, Washington | G0426 | Gas | 31.0 MW | withdrawn | Mason, Washington |
| Cushman 2 | 3915_32 | Other | 27.0 MW | operational | Mason, Washington |
| Cushman 2 | 3915_31 | Other | 27.0 MW | operational | Mason, Washington |
| Cushman 2 | 3915_33 | Other | 27.0 MW | operational | Mason, Washington |
| Cushman 1 | 3914_21 | Other | 25.2 MW | operational | Mason, Washington |
| Cushman 1 | 3914_22 | Other | 25.2 MW | operational | Mason, Washington |
| Shelton Hills | L0383 | Other | 25.0 MW | withdrawn | Mason, Washington |
| Duckabush | L0464 | Other | 10.0 MW | active | Mason, Washington |
| T3ba'das Substation | L0466 | Other | 10.0 MW | active | Mason, Washington |
| Manzanita Substation | L0540 | Other | 6.7 MW | operational | Mason, Washington |
| Lilliwaup Falls Hydro Project | G0498 | Other | 2.0 MW | operational | Mason, Washington |
| Cushman 2 | 3915_35 | Other | 1.8 MW | operational | Mason, Washington |
| Cushman 2 | 3915_34 | Other | 1.8 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4740 | Other | 0.2 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4741 | Other | 0.2 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4735 | Other | 0.2 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4736 | Other | 0.2 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4738 | Other | 0.2 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4739 | Other | 0.2 MW | operational | Mason, Washington |
| Lilliwaup Falls Generating | 50700_4737 | Other | 0.2 MW | operational | Mason, Washington |
| Skokomish Substation | L0350 | Other | 0.0 MW | operational | Mason, Washington |
| Transmission Reinforcement | L0308 | Other | 0.0 MW | operational | Mason, Washington |
Top developers
| Developer (canonical) | Projects | Capacity |
|---|---|---|
| Public Utility District No. 1 of Cowlitz County | 7 | 130 MW |
| Lilliwaup Falls Generating Company | 1 | 2 MW |
| Peninsula Light Company | 1 | 0 MW |
Explore related data
Source last checked2026-07-31
Data last materially changed2026-08-27
Page data generated2026-08-27
Provenance: bpa-oasis; U.S. EIA — Form EIA-860M generator inventory (operating + planned). Values are normalized from public source records into the interXdata canonical warehouse; see each source for original filings.
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