Koskikeskinen
lake in Jämsä, Finland
Koskikeskinen is a lake located in central Jämsänkoski, Central Finland. Koskikeskinen is a backwater between two rapids that belong to the Jämsänjoki route. The lake is surrounded by the urban area of Jämsänkoski. Koskikeskinen is 96 meters above sea level. The area is 14 hectares and the coast is 2.41 kilometers long. The lake is part of the Kymi River's drainage basin.
Features of the lake
Koskikeskinen is 650 meters long, 500 meters wide and covers an area of 14.0 hectares. It is located in the upper reaches of Jämsänjoki below the lake Kankarisvesi. The short river bed of the Jämsänjoki starts from the Kankarisvesi, which descends through two parallel rapids, Naiskoski and Rekolankoski, into the Koskikeskinen. The Rekolankoski power plant operates on the western route, while the Naiskoski is used as a spillway.
Begin with the source’s own compact description: “Koskikeskinen” is lake in Jämsä, Finland. The dossier treats that line as a proposition to test through Koskikeskinen, lake and Jämsä, not as a finished interpretation.
Why this record matters
The phrase “lake in Jämsä, Finland” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Jul 25, 2026. The linked authority identifier is Q24368261.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Koskikeskinen”, its source revision and the description used here.
- Expand the search: follow Koskikeskinen primary sources, Koskikeskinen archive and Koskikeskinen research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Koskikeskinen”?
- Which earlier names or jurisdictions may reveal additional records?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “Koskikeskinen” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.