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Toronto and Region Conservation Authority

conservation authority in the Greater Toronto Area of Ontario, Canada

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 24, 2026
Entity authorityQ7826580 ↗
Source-derived summary

The Toronto and Region Conservation Authority (TRCA) is a conservation authority in southern Ontario, Canada. It owns about 16,000 hectares (40,000 acres) of land in the Toronto region, and it employs more than 400 full-time employees and coordinates more than 3,000 volunteers each year. TRCA's area of jurisdiction is watershed-based and includes 3,467 square kilometres (1,339 sq mi) – 2,506 on land and 961 water-based in Lake Ontario. This area comprises nine watersheds from west to east – Etobicoke Creek, Mimico Creek, Humber River, Don River, Highland Creek, Petticoat Creek, Rouge River, Duffins Creek and Carruthers Creek.

The lands that TRCA administers are used for flood control, recreation, education and watershed preservation activities, including drinking water source protection. On several sites, TRCA operates conservation areas open to the public for recreational use. TRCA also operates The Village at Black Creek, an open-air museum of 19th century buildings from around Ontario with 1860s period furnishings and decor. Several municipal parks inside and outside Toronto are located on TRCA lands, such as the Toronto Zoo, Humber Bay Park and Milne Park. TRCA operates five dams for flood control.

TRCA assists its partners in contributing to a healthy city region.

Editorial summary

Begin with the source’s own compact description: “Toronto and Region Conservation Authority” is conservation authority in the Greater Toronto Area of Ontario, Canada. The dossier treats that line as a proposition to test through Toronto, Region and Conservation, not as a finished interpretation.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current 197-word lead offers orientation but no explicit four-digit date, so chronology should not be assumed. The linked authority record independently contributes the date 1957. For this dossier, Toronto, Region and Conservation is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “conservation authority in the Greater Toronto Area of Ontario, Canada” 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.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated May 24, 2026. The linked authority identifier is Q7826580. VIAF identifies the subject as 123104656. The Library of Congress control number is n85818599. 3 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. 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

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Toronto and Region Conservation Authority”, its source revision and the description used here.
  2. Expand the search: follow Toronto and Region Conservation Authority primary sources, Toronto and Region Conservation Authority archive and Toronto research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Toronto and Region Conservation Authority”?
  2. What terminology or title could unlock a more precise catalogue search?
  3. Which cited source is closest to the event, object or claim?
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Source & attribution

This entry incorporates text from “Toronto and Region Conservation Authority” 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.