1001 Smart Cities

Permanent project revision

Railbelt Battery Storage & Fire Island Wind Integration

Revision 2026-08-27-claims-and-sources · effective 2026-08-27

Superseded. A later revision exists: 2026-08-27-source-dating →

unreviewed

Created the first structured Evidence Passport with 4 claims and 3 source dossiers.

sha256:716d15987c216d531f6a3bcf69095b2dee2d7ced7540a489d9cade95c801fb1e
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
4
of 4 claims mapped
3
source dossiers
2
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-1ed7dfc9bd92bc3d quantitative
Chugach Electric integrates the 11-turbine, 17.6MW Fire Island wind farm (running since 2012, about 3% of retail load) into Anchorage's Railbelt grid
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator's Fire Island Wind page gives the 17.6 MW capacity and the roughly 3% share of retail load.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Chugach Electric — Fire Island Wind (operator)
Claim 2 clm-337bceed308ebd4d quantitative
Since October 2024 it also stabilizes that grid with a 40MW/80MWh Tesla Megapack battery system, co-owned with Matanuska Electric ($65M total), that replaces spinning-reserve gas generators as backup
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The operator's commissioning release of 7 October 2024 gives the 40 MW two-hour system, the $65 million cost and the co-ownership; independent trade coverage of 11 October 2024 confirms the 80 MWh Tesla Megapack installation.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Chugach Electric — BESS officially commissioned (operator)
  2. Energy-Storage.news — 80MWh Tesla Megapack BESS (trade)
Claim 3 clm-4538c81bc6cc0cfb quantitative
Chugach projects the battery system will cut Railbelt-area natural gas consumption by about 5% a year by holding spinning reserve instead of idling gas turbines for it
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The commissioning release states the expected reduction in natural gas consumption and the mechanism — holding reserve in the battery rather than in part-loaded turbines.
Caveat
A projection by the utility that bought the system; no measured saving has been published since commissioning.

Sources carrying this claim

  1. Chugach Electric — BESS officially commissioned (operator)
Claim 4 clm-89d244208110658b quantitative
no measured figure has been published since commissioning in October 2024
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Both the operator's release and the trade coverage describe the system at commissioning and state the expected saving; neither carries an after-the-fact measurement, and no later source is cited.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Chugach Electric — BESS officially commissioned (operator)
  2. Energy-Storage.news — 80MWh Tesla Megapack BESS (trade)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-27-claims-and-sources effective 2026-08-27 · created 2026-08-27

Awaiting operator and domain-expert review; publication of this revision implies neither.

Erratum on this revision's envelope. The snapshot, its hash and its permanent link are untouched.

  • createdAt previously read 2026-09-01T13:00:00Z. The batching script that produced this revision advanced createdAt into the future to satisfy the strictly-increasing order the validator requires per entity. The value never recorded a real event; the corrected value is the moment the revision provably existed in the repository. Corrected to 2026-08-27T03:18:08Z on 2026-08-27; evidence: first appears in commit 52078886be, committed 2026-08-27T03:18:08Z.
sha256:716d15987c216d531f6a3bcf69095b2dee2d7ced7540a489d9cade95c801fb1e
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
4
of 4 claims mapped
3
source dossiers
2
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Chugach Electric Association (75%) and Matanuska Electric Association (25%)
Actor types
utility
Funding model
utility
Funding description
Not recorded
Cost
$65M
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

3 source dossiers

Chugach Electric — Fire Island Wind (operator) chugachelectric.com · 1 linked claim

Open original source ↗

Stable source ID
src-e6629c316d878a43
Publisher
Name not classified · chugachelectric.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-27
Dossier created
2026-09-01
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms Fire Island Wind's 17.6MW capacity and ~3% of retail load, current page.

Descriptive only — not page/paragraph exact
Claims linked
Chugach Electric — BESS officially commissioned (operator) chugachelectric.com · 3 linked claims

Open original source ↗

Stable source ID
src-d479bb44eb94ecc9
Publisher
Name not classified · chugachelectric.com
Type / language
web-page · language not classified
Published
2024-10-07
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-27
Dossier created
2026-09-01
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official press release: 40MW/2-hour BESS, $65M, 75/25 Chugach/MEA ownership, spinning-reserve replacement, projected 5% annual gas savings.

Descriptive only — not page/paragraph exact
Claims linked
Energy-Storage.news — 80MWh Tesla Megapack BESS (trade) energy-storage.news · 2 linked claims

Open original source ↗

Stable source ID
src-4d4475e5baf8802f
Publisher
Name not classified · energy-storage.news
Type / language
web-page · language not classified
Published
2024-10-11
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-27
Dossier created
2026-09-01
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Independent trade coverage of the October 2024 commissioning.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.