Data center siting snapshot: Grant County, Washington

Line miles are measured from the archived HIFLD Transmission Lines layer inside the Census county boundary. Mapped lines are not available capacity.

What the public record shows

The archived HIFLD map records approximately 729.1 miles of 230 kV-and-above transmission line within Grant County, comprising 182.2 miles at 500 kV or more and 546.9 miles at 230 kV ^[1]. An additional 313.4 miles of 115–161 kV line is mapped in the area ^[2]. Bonneville Power Administration, PUD No 2 of Grant County, and PUD No 1 of Kittitas County hold the most mapped 115 kV+ line miles ^[3]. Nine named line endpoints touching 230 kV+ lines are mapped inside the county ^[4]. PUD No 2 of Grant County is a retail electric utility with mapped service territory covering part of the county, though boundaries are approximate ^[5].

As of 2026-11-09, records hold no county- or city-level data center moratorium or ordinance for Grant County ^[6]. At the state level, SB 6231 was enacted on 2026-04-01 to expire or narrow certain data center sales and use tax exemption certificates ^[7]. SB 5982 was enacted on 2026-03-24 to expand Clean Energy Transformation Act coverage to certain entities, closing data center clean-power compliance gaps ^[8]. SB 5431 was enacted on 2025-05-20 to clarify the administration of data center sales and use tax exemptions ^[9]. HB 2515, which would have created an emerging large energy use facility framework, failed on 2026-03-12 ^[10]. Its Senate companion, SB 6171, also failed on 2026-02-04 ^[11].

Drafted by our local model from the numbered facts below, then checked sentence by sentence by a second model and a rules-based check.

Data center rules on record

Rule records come from The MW Desk legislation tracker, which includes rows from the Moratorium Nation dataset by Michael J. Bommarito (CC BY 4.0). Statuses change; confirm with the jurisdiction's own record.

Utilities on record

PUD No 2 of Grant County. (HIFLD/EIA-861 territory polygons; approximate and often overlapping.)

Market context on The MW Desk: Washington: Central WA (Quincy/Wenatchee) + Seattle.

Sources

1. [1] The archived HIFLD map shows about 729.1 miles of 230 kV-and-above transmission line inside Grant County, WA: 182.2 miles at 500 kV or more, 0.0 miles at 345 kV and 546.9 miles at 230 kV. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
2. [2] The same map shows about 313.4 miles of 115–161 kV line in the county. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
3. [3] Owners of record with the most mapped 115 kV+ line miles in the county: Bonneville Power Administration, PUD No 2 of Grant County, PUD No 1 of Kittitas County. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
4. [4] 9 named line endpoints touching 230 kV+ lines (usually substations or switchyards) are mapped inside the county. Source: HIFLD Transmission Lines (archived by SeerAI, CC BY 4.0)
5. [5] Retail electric utilities whose mapped service territory covers part of the county include: PUD No 2 of Grant County. Territory boundaries are approximate. Source: HIFLD Electric Retail Service Territories (EIA-861 based; archived by SeerAI, CC BY 4.0)
6. [6] Our records hold no county- or city-level data center moratorium or ordinance for Grant County as of 2026-11-09. Source: The MW Desk legislation tracker
7. [7] Washington state/utility level, Washington: SB 6231 (2025-26) (Expires or narrows certain data center sales and use tax exemption certificates, including certificates for qualifying refurbished data centers; bill reports document industry opposition and state revenue/ratepayer arguments). Status: enacted, dated 2026-04-01. Source: SB 6231 - Bill History and Status (Washington State Legislature)
8. [8] Washington state/utility level, Washington: SB 5982 (2025-26) (Expands Clean Energy Transformation Act coverage to certain port districts, single-customer consumer-owned utilities, and affected market customers; committee reports describe the bill as closing data center clean-power compliance gaps). Status: enacted, dated 2026-03-24. Source: SB 5982 - Bill History and Status (Washington State Legislature)
9. [9] Washington state/utility level, Washington: SB 5431 / SSB 5431 (2025-26) (Clarified administration of data center sales and use tax exemptions, including treatment of existing employment positions for qualifying refurbishment or newly eligible facilities). Status: enacted, dated 2025-05-20. Source: SB 5431 - Bill History and Status (Washington State Legislature)
10. [10] Washington state/utility level, Washington: HB 2515 (2025-26) (Would have created an emerging large energy use facility (ELEUF) framework for facilities with 20 MW or more demand, including utility tariffs/policies, cost-shift protections, water and energy reporting, clean-energy requirements, demand response, and a 0.5 cent/kWh ELEUF fee). Status: failed, dated 2026-03-12. Source: HB 2515 - Bill History and Status (Washington State Legislature)
11. [11] Washington state/utility level, Washington: SB 6171 (2025-26) (Senate companion ELEUF regulatory bill addressing large-load tariffs, reporting, clean-energy requirements, and ratepayer protections). Status: failed, dated 2026-02-04. Source: SB 6171 - Bill History and Status (Washington State Legislature)