1001 Smart Cities

Permanent project revision

Katri Vala Heat Pump Plant

Revision 2026-08-27-claims-and-sources · effective 2026-07-24

Superseded.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

unreviewed

Created the first structured Evidence Passport with 7 claims and 3 source dossiers.

sha256:4a7ab858584a6ff16cca71a34252c5322034189b1184c6dbe4f365faa82ba284
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.
7
of 7 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-8b72ec7e8087b4bf quantitative
Since 2006, Helen has run heat pumps in a rock cavern beneath Katri Vala Park that extract heat and cooling from purified wastewater leaving the Viikinmäki treatment plant
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The April 2020 release describes the plant as Helen's first heat pump investment, in production use since 2006, located in a rock cavern under Katri Vala Park, using the excess heat of purified waste water.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helen (operator) — seventh heat pump announced (16 April 2020)
Claim 2 clm-fcf0c16add5bd432 quantitative
now at 160MW heating / 100MW cooling after a 2023 expansion
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The September 2023 release states that after the expansion the plant has a heating capacity of 160 MW and a cooling capacity of 100 MW.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helen (operator) — Katri Vala expansion completed (28 September 2023)
Claim 3 clm-b4f76b4fa22a6fe4 descriptive
distinct from Helen's newer Salmisaari seawater-tunnel project, still under construction
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2020 release treats Salmisaari as a separate coal plant whose output the new Katri Vala pump partly replaces, and lists Helen's other heat-pump sites separately.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helen (operator) — seventh heat pump announced (16 April 2020)
Claim 4 clm-79b64a59bdf5c9d2 quantitative
Recovers over 1,000GWh of heat per year from purified wastewater and district-cooling return water, enough to cover most of central Helsinki's district heating demand during summer
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The September 2023 release states the plant produces over 1,000 GWh of heat per year, enough to cover the majority of central Helsinki's heating needs during the summer season.
Caveat
A plant output figure published by the operator, not an independently measured displacement.

Sources carrying this claim

  1. Helen (operator) — Katri Vala expansion completed (28 September 2023)
Claim 5 clm-4af0fd56674e2154 quantitative
the 2020 release put the finished plant at 155 MW of heat and 103.5 MW of cooling, the 2023 completion release at 160 MW and 100 MW
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The April 2020 release states the investment will raise the plant to 155 MW of heat and 103.5 MW of cooling; the September 2023 completion release gives 160 MW and 100 MW.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helen (operator) — seventh heat pump announced (16 April 2020)
  2. Helen (operator) — Katri Vala expansion completed (28 September 2023)
Claim 6 clm-309dec8fda2515e6 quantitative
the utility only framed the plant as a coal-replacement instrument in 2020, fourteen years after it opened as its first heat-pump investment
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2020 release calls the seventh heat pump the first investment to replace coal use at the Salmisaari power plant, and in the same text names Katri Vala as Helen's first heat pump investment in 2006.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helen (operator) — seventh heat pump announced (16 April 2020)
Claim 7 clm-059f1c5af946d3ca descriptive
The zero-emission claim rests on the electricity that drives the pumps
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2023 release states the heat pumps are powered by emission-free electricity and generate no carbon dioxide emissions — an attribute of the supply, not of the plant.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Helen (operator) — Katri Vala expansion completed (28 September 2023)

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 2026-07-24 · 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 2026-09-02T15:00:00Z. 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 2026-08-27T03:40:49Z on 2026-08-27; evidence: first appears in commit 1bd3d9fb88, committed 2026-08-27T03:40:49Z.
sha256:4a7ab858584a6ff16cca71a34252c5322034189b1184c6dbe4f365faa82ba284
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
7
of 7 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
Helen
Actor types
utility
Funding model
utility
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

3 source dossiers

Helen (operator) — Katri Vala expansion completed (28 September 2023) helen.fi · 4 linked claims

Open original source ↗

Stable source ID
src-f39883d8598979d2
Publisher
Name not classified · helen.fi
Type / language
web-page · language not classified
Published
2023-09-28
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-24
Dossier created
2026-09-02
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

2023 announcement of the completed 7-pump expansion: 160MW heating / 100MW cooling, 1,000+GWh/year.

Descriptive only — not page/paragraph exact
Claims linked
Helen (operator) — seventh heat pump announced (16 April 2020) helen.fi · 4 linked claims

Open original source ↗

Stable source ID
src-e475437d7633307e
Publisher
Name not classified · helen.fi
Type / language
web-page · language not classified
Published
2020-04-16
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-24
Dossier created
2026-09-02
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

2020 announcement of the final expansion pump; gives 2006 commissioning date and pre-expansion capacity figures.

Descriptive only — not page/paragraph exact
Claims linked
Circle Economy Knowledge Hub (independent) circle-economy.com · background

Open original source ↗

Stable source ID
src-3c89ec9fe982b656
Publisher
Name not classified · circle-economy.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
2026-07-24
Dossier created
2026-09-02
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The knowledge-hub article did not return a readable body to automated retrieval; the figures in this entry rest on the two operator releases.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
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.