Capital Program Planning for Wyoming Electric Utilities

by | Oct 21, 2026

Wyoming · Electric & Grid Utilities

Wyoming generates far more power than it uses. Your capital plan is where coal politics and the export build collide.

Wyoming produces more than twice the electricity it consumes and ships the rest across the West, even as state law fights to keep coal units running and PacifiCorp's plan retires them.1 Add a $4 billion advanced reactor, thousands of megawatts of new wind, and multi-state transmission, and every force pulls the project list a different way. Invizion helps electric utilities re-sequence a capital portfolio in a click — and defend every decision.

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The bottom line: Wyoming exports more than half the power it makes while state law fights to keep coal running and PacifiCorp's plan retires it — and a $4 billion reactor, thousands of megawatts of wind, and multi-state transmission all land on the same capital plan. The utilities that stay ahead are the ones whose portfolios can re-sequence as fast as the politics and the queue change.
2.4×1
Wyoming's 2024 net generation (40.7M MWh) versus in-state retail sales (17.2M MWh) — well over half its power is exported.
3,000 MW2
Chokecherry & Sierra Madre — up to 3,000 MW of wind, among the largest onshore projects in North America.
$4B3
TerraPower's Natrium advanced reactor at Kemmerer, rising next to a retiring coal plant.
14.7%4
Rocky Mountain Power's 2024 Wyoming rate-increase request — its third ask in about a year.

The Wyoming Landscape

Four forces are moving your project list at once

None of these is theoretical, and none of them waits for your next budget cycle. In Wyoming they pull in opposite directions — keep coal, build wind, add nuclear, export it all — and the capital plan is where they have to reconcile.

Demand — An Export Grid

Built to sell power out of state

Wyoming generated about 40.7 million MWh in 2024 but consumed only 17.2 million MWh at retail — it is an exporter first, shipping well over half its output to other Western states.1

The growth story is transmission and generation to serve that outside demand: the 728-mile, 3,000 MW TransWest Express HVDC line from Rawlins to the Southwest, paired with the Chokecherry & Sierra Madre wind complex, plus PacifiCorp's Energy Gateway segments.102 Every export commitment is a capacity and capital commitment competing for the same dollars.

Reliability — Thinning Margins

The West's cushion is speculative

WECC's 2025 assessment warns the Western Interconnection could face energy shortfalls as early as 2028, with loss-of-load hours from 2029 even if every planned resource lands on time.5

In the Basin subregion that includes Wyoming, roughly 80% of planned additions are still “speculative,” so the reliability margin depends on projects actually getting built — and on an aging coal fleet staying available while the replacements clear the queue.5

Generation — Coal Politics vs. the IRP

The state wants coal kept; the plan retires it

Wyoming is the nation's largest coal producer, supplying roughly 40% of U.S. coal, and its politics reflect it.6 A 2020 law pushes utilities to study and pursue carbon capture to keep coal units running — Rocky Mountain Power has proposed CCUS on Jim Bridger units 3 and 4 rather than converting them to gas.7

Yet PacifiCorp's own plan points the other way for Jim Bridger (1,413 MW), Naughton, Dave Johnston (762 MW) and Wyodak, while TerraPower's ~$4 billion Natrium reactor rises at the retiring Kemmerer coal site.83 Which future you fund changes the whole portfolio.

Capital — Transmission & Hardening

Billions in lines, on top of the backlog

Rocky Mountain Power's 2024 rate case is driven by new build: the Rock Creek I and II wind farms and the Gateway South and Gateway West Segment D.1 transmission lines, plus rising wildfire-insurance costs.4

On the private side, TransWest Express (~$3 billion) and Chokecherry & Sierra Madre (~$5 billion) are moving toward completion.102 New obligations don't replace the backlog — they stack on it, and something on the list has to move.

Who Runs Wyoming's Grid

One dominant IOU, a second utility, and a web of coops and municipals

Wyoming's retail grid is led by PacifiCorp's Rocky Mountain Power, with Black Hills Energy in the southeast, alongside generation-and-transmission cooperatives and municipal systems. The pressures are shared; the accountability path differs.

Investor-owned utilities

Rates & capital recovery regulated by the Wyoming PSC

Rocky Mountain Power (PacifiCorp) ~144,000 Wyoming customers · dominant IOU7
Black Hills Energy (Cheyenne Light, Fuel & Power) ~80,000 customers · Cheyenne & SE Wyoming11
Rocky Mountain Power service area Casper, Cody, Laramie, Rock Springs, Kemmerer & more13

Rocky Mountain Power's 2024 Wyoming rate case sought a 14.7% increase, roughly $17 more per month for a typical customer.4

Cooperatives & public power

Governed by boards & members, not PSC rates

Basin Electric member coops Powder River Energy, others · wholesale G&T12
Wyoming Municipal Power Agency Municipal wholesale power12
Distribution cooperatives High West, Carbon Power & Light, Wheatland REA & more

Wyoming's installed wind capacity has climbed past roughly 2,700 MW and keeps growing as export projects advance.14

Rate-Setting & Oversight

Every capital dollar has to be defensible

Whether you answer to the Public Service Commission or a cooperative board, the question is the same: why this project, why now, why at this cost — and, in Wyoming, why coal or why not.

  • Wyoming Public Service Commission (WPSC) regulates rates, capital recovery, and resource planning for investor-owned utilities such as Rocky Mountain Power and Black Hills Energy.15
  • Rocky Mountain Power's 2024 rate case sought a 14.7% increase (about $17 per month for a typical customer), filed August 2024 for a June 2025 effective date — its third ask in roughly a year, so approvals are not a formality.4
  • Coal-preservation law: a 2020 statute pushes utilities to study and pursue carbon capture to keep coal units operating, shaping how retirements and CCUS retrofits (like Jim Bridger units 3 and 4) land in front of the Commission.7
  • Cooperatives & municipals such as Basin Electric members and the Wyoming Municipal Power Agency set rates through boards — capital decisions made in front of their members, not the PSC.12

Capital On The Table

The money is moving — can your plan absorb it?

Wyoming has more grid and generation capital in flight than in a generation, much of it private and export-driven. The constraint is readiness: which projects qualify, which are shovel-ready, and how the timing lines up.

  • TransWest Express: ~$3 billion for a 728-mile, 3,000 MW ±600 kV HVDC line moving Wyoming wind from Rawlins to the Desert Southwest.10
  • Chokecherry & Sierra Madre: ~$5 billion for up to 3,000 MW of wind (about 1,000 turbines) developed by the Power Company of Wyoming.2
  • TerraPower Natrium: ~$4 billion for the 345—500 MWe reactor at Kemmerer, with the U.S. DOE's Advanced Reactor Demonstration Program funding roughly half; non-nuclear construction began in 2024 and NRC issued the construction permit in 2026.39
  • Rocky Mountain Power's Rock Creek I & II wind and Gateway transmission are the utility-side capital now flowing into rates — the drivers behind the 2024 rate case.4
  • IRA transferable and direct-pay tax credits put utility-scale wind, storage, and nuclear within closer reach for Wyoming's cooperatives and municipal systems.

Where Invizion Fits

Turn Wyoming's grid build-out into a defensible capital plan

Invizion is scenario-based capital portfolio optimization built for utilities. When load forecasts jump, a grant lands, or a retirement date moves, you don't re-plan by hand for weeks — you model it and decide with a record to stand behind.

1

Model the “what-if” before it's forced on you

A data-center interconnect, a delayed transmission line, a moved retirement date — build the scenario and see the impact on the whole portfolio, side by side with today's plan.

2

Re-sequence 500 projects in a click

When priorities move, Invizion re-orders the portfolio automatically — accelerating, stretching, or deferring projects against the constraints you set, not weeks of spreadsheet surgery.

3

Give regulators or your board a defensible record

Every prioritization and trade-off is captured. When you're asked “why this project, why now,” the answer is documented — not reconstructed after the fact.

Wyoming's Grid, In Brief

Questions Wyoming utility leaders are asking

Short, sourced answers — the same facts we dig into with utilities looking at their capital programs.

Does Wyoming use all the electricity it generates?
No. Wyoming generated about 40.7 million MWh in 2024 but consumed only 17.2 million MWh at retail, exporting well over half its power to other Western states — which is why transmission like TransWest Express is so central to its capital picture.110
Is Wyoming keeping its coal plants or retiring them?
Both pressures are live. A 2020 state law pushes utilities toward carbon capture to keep coal units running — Rocky Mountain Power has proposed CCUS on Jim Bridger units 3 and 4 — while PacifiCorp's planning still points to retirements and conversions across its Wyoming coal fleet.78
What is the Natrium reactor at Kemmerer?
It is TerraPower's ~$4 billion Natrium advanced reactor — 345 MWe boostable to 500 MWe via molten-salt storage — being built next to a retiring coal plant, with the U.S. DOE funding roughly half; non-nuclear construction began in 2024 and the NRC construction permit was issued in 2026.39
Who regulates my Wyoming utility's rates?
The Wyoming Public Service Commission sets rates and reviews capital recovery for investor-owned utilities such as Rocky Mountain Power and Black Hills Energy. Cooperatives and municipal systems are governed by their own boards.1512
Can the Western grid keep up?
WECC warns the West could face energy shortfalls as early as 2028, and in the Basin subregion that includes Wyoming roughly 80% of planned additions are still speculative — so reliability hinges on projects landing on schedule.5
How does Invizion help Wyoming electric utilities plan capital?
Invizion is scenario-based capital portfolio optimization for utilities. It lets you model how a coal-retirement date, a carbon-capture mandate, a new transmission line, or a load surge reshuffles your whole project list, re-sequence the portfolio automatically, and keep a defensible record of every decision for the Public Service Commission or your board.

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About the Author

GB

Guy Barlow

President, Invizion

Guy Barlow leads Invizion, a capital lifecycle management platform for water and wastewater utilities. He has spent two decades at the intersection of utility capital programs, funding, and analytics, helping utilities make faster, more defensible capital decisions.

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This briefing was last reviewed September 2026.

Sources

  1. U.S. Energy Information Administration — Wyoming Electricity Profile 2024 (net generation 40,709,150 MWh; retail sales 17,216,901 MWh; avg. price 9.14¢/kWh). www.eia.gov
  2. Chokecherry and Sierra Madre Wind Energy Project (Power Company of Wyoming) — up to ~3,000 MW, ~1,000 turbines, ~$5B. en.wikipedia.org
  3. Kemmerer Power Station / Natrium demonstration — 345—500 MWe, non-nuclear construction began June 2024, NRC construction permit March 2026. en.wikipedia.org
  4. Wyoming Public Media — Rocky Mountain Power's 14.7% Wyoming rate request (~$17/mo), filed Aug. 2024, effective June 2025; Rock Creek wind and Gateway transmission, Aug. 6, 2024. www.wyomingpublicmedia.org
  5. WECC 2025 Western Assessment of Resource Adequacy — possible Western shortfalls by 2028; ~80% of Basin subregion additions speculative. feature.wecc.org
  6. Coal in Wyoming — largest U.S. coal-producing state since 1986, roughly 40% of national output. en.wikipedia.org
  7. Wyoming Public Media — carbon capture proposed for Jim Bridger units 3 & 4; 2020 Wyoming CCUS law; RMP serves ~144,000 Wyoming customers, Apr. 3, 2024. www.wyomingpublicmedia.org
  8. PacifiCorp — Wyoming coal capacities: Jim Bridger 1,413 MW, Dave Johnston 762 MW, Naughton 357 MW (coal), Wyodak 268 MW. en.wikipedia.org
  9. TerraPower — Natrium project ~$4B total, U.S. DOE Advanced Reactor Demonstration Program funding roughly half. en.wikipedia.org
  10. TransWest Express — 728-mile, 3,000 MW ±600 kV HVDC line, ~$3B, Rawlins, WY to the Desert Southwest. en.wikipedia.org
  11. Black Hills Energy — Cheyenne Light, Fuel & Power serves ~80,000 customers in Cheyenne and southeastern Wyoming. en.wikipedia.org
  12. Basin Electric Power Cooperative — Wyoming members include Powder River Energy Corporation and the Wyoming Municipal Power Agency. en.wikipedia.org
  13. Rocky Mountain Power (PacifiCorp) — Wyoming service territory: Casper, Cody, Laramie, Rock Springs, Kemmerer and more. en.wikipedia.org
  14. Wind power in Wyoming — installed wind capacity past ~2,700 MW and rising as export projects advance. en.wikipedia.org
  15. Wyoming Public Service Commission — rates, capital recovery, and resource-plan oversight for investor-owned electric utilities. psc.wyo.gov