Wyoming Highway 318
state highway in Platte County, Wyoming, United States
Wyoming Highway 318 (WYO 318) is a 1.09-mile (1.75 km) east–west state highway in northeastern Platte County, Wyoming, United States, that connects Wyoming Highway 270 (WYO 270) in Hartville with Sunrise.
Route description
WYO 318 begins at WYO 270 in the small town of Hartville. WYO 318 travels east as Hartville's Main Street for a mile till it reaches the old mining town of Sunrise at 1.09 miles (1.75 km). Upon reaching the former town, WYO 318 ends at a road closed sign as the mine property is gated. The Sunrise Mine operated until 1980 and produced 42,457,187 tons of iron ore
History
The section of present-day Wyo 270 from U.S. Route 26 (US 26), east of Guernsey, north to Hartville at present-day WYO 318 was formerly designated as Wyoming Highway 318 prior to the 1970s. WYO 318 used to begin as US 26 at Guernsey and end at Sunrise with a 90 degree turn at Hartville. The stretch between Guernsey and Hartville was recommissioned as Wyoming Highway 270 when that road was completed between Manville and Hartville to maintain continuity.
Major intersections
The entire route is in Platte County.
Begin with the source’s own compact description: “Wyoming Highway 318” is state highway in Platte County, Wyoming, United States. The dossier treats that line as a proposition to test through Wyoming, Highway and state, not as a finished interpretation.
Why this record matters
The phrase “state highway in Platte County, Wyoming, United States” 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.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Jun 3, 2025. The linked authority identifier is Q2509087. Authority coordinates are 42.327, -104.729. None of the 2 selected statements returned an explicit reference. The first chronological checks are 1980.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. 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 “Wyoming Highway 318”, its source revision and the description used here.
- Expand the search: follow Wyoming Highway 318 primary sources, Wyoming Highway 318 archive and Wyoming 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 “Wyoming Highway 318”?
- 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 “Wyoming Highway 318” 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.