Flat Brook
stream in Sussex County, New Jersey
Flat Brook, also spelled as Flatbrook, is an 11.6-mile-long (18.7 km) tributary of the Delaware River in Sussex County, New Jersey in the United States.
Upstream of the inflow of Little Flat Brook, the brook is known as Big Flat Brook.
Historically, the watershed of the Flat Brook, and its two main tributaries, the 12.7 miles (20.4 km) Little Flat Brook and 16.5 miles (26.6 km) Big Flat Brook, has been known as the Walpack Valley and is part of the historic Minisink region.
The Appalachian Trail passes through the watershed of the Flat Brook along Kittatinny Mountain.
The Flat Brook flows into the Delaware River near Walpack Bend in the Flatbrookville section of Walpack Township.
“Flat Brook” enters the record as stream in Sussex County, New Jersey. Crown Archives preserves that source wording while asking what Flat, Brook and stream can confirm, complicate or overturn.
Why this record matters
“Flat Brook” is worth following because a concise public description often conceals a longer documentary argument. Here, Flat, Brook and stream provides the most credible route into that argument.
Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Aug 19, 2026. The linked authority identifier is Q5457727. Authority coordinates are 41.189, -74.847. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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 “Flat Brook”, its source revision and the description used here.
- Expand the search: follow Flat Brook primary sources, Flat Brook archive and Flat 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 “Flat Brook”?
- Which earlier names or jurisdictions may reveal additional records?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “Flat Brook” 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.