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New York State Route 100C

State highway in Westchester New York, US

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionDec 11, 2025
Entity authorityQ2486208 ↗
Source-derived summary

New York State Route 100C (NY 100C) is an east–west spur route of NY 100 located in Westchester County, New York, in the United States. The road is entirely within the town of Greenburgh, running for 1.24 miles (2.00 km) from an intersection with NY 9A (Saw Mill River Road) to a junction with NY 100 and NY 100A just east of the Sprain Brook Parkway. The eastern terminus of NY 100C also serves as NY 100A's northern endpoint.

Route description

NY 100C begins as Old Saw Mill River Road at an at-grade intersection with NY 9A (Saw Mill River Road) in the town of Greenburgh. After Old Saw Mill River Road leaves it at a roundabout, the route heads east as Grasslands Road and crosses over NY 9A, where it has a northbound entrance ramp. Continuing east, NY 100C enters a grade-separated interchange with the Sprain Brook Parkway. A short distance from the interchange, NY 100C intersects with NY 100 (Bradhurst Avenue) and NY 100A (Knollwood Road). This intersection serves as the eastern terminus of NY 100C, as Grasslands Road continues east as NY 100.

History

All of what is now NY 100C was originally designated as part of NY 142 c. 1931. At the time, NY 142 overlapped with NY 9A along Old Saw Mill River Road (modern CR 303) to the east end of Neperan Road, where it broke from NY 9A and proceeded toward Hawthorne on then-Saw Mill River Road.

Editorial summary

“New York State Route 100C” enters the record as state highway in Westchester New York, US. Crown Archives preserves that source wording while asking what York, State and Route can confirm, complicate or overturn.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1931—that can be checked directly. The selected authority fields contribute no independent date. Its strongest next move is a source search built around York, State and Route.
Editorial analysis

Why this record matters

“New York State Route 100C” is worth following because a concise public description often conceals a longer documentary argument. Here, York, State and Route provides the most credible route into that argument.

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 Dec 11, 2025. The linked authority identifier is Q2486208. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1931.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. 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.

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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.

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  1. Establish the record: confirm the title “New York State Route 100C”, its source revision and the description used here.
  2. Expand the search: follow New York State Route 100C primary sources, New York State Route 100C archive and York 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.

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Source & attribution

This entry incorporates text from “New York State Route 100C” 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.