page_title: Iowa Highway 316
section_title: Route description
hierarchical_section_title: Iowa Highway 316 / Route description
caption_attribution_description: The northern end of Iowa Highway 316 at the Runnells, Iowa, city limits.
context_page_description: Iowa Highway 316 is a 5.183-mile-long spur route in central Iowa. The route begins at Iowa Highway 5 south of Swan and ends at the eastern city limits of Runnells. Prior to 2003, Iowa 316 extended north to Iowa Highway 163 north of Runnells, but that portion was turned over to Polk County. The highway's primary purpose is a crossing of the Des Moines River south of Runnells.
context_section_description: Iowa 316 begins at an intersection with Iowa Highway 5 south of Swan.  The first one-sixth mile (270 m) are in Warren County, while the next two and a third miles (3.8 km) of the road form the Warren/Marion county border.  it crosses over a BNSF Railway line and turns into Warren County.  For the rest of its length, the highway closely parallels these railroad tracks.  Iowa 316 in Warren County is bordered to the south and east by the Middle River and to the north and east by the Des Moines River, and occasionally, Lake Red Rock.  The area north of the highway serves as an overflow basin for Lake Red Rock, which is formed by a dam twenty miles (32 km) downstream near Pella.  The highway and the railroad tracks approach the main channel on a causeway.  The highway crosses the main channel at the Warren / Polk county line, on a simple girder bridge, while the adjacent railroad crosses on an over-deck truss bridge.  It continues north into Polk County on another causeway for two miles (3.2 km), where it curves to the northwest towards Runnells.  At the Runnells city limits, Iowa 316 ends abruptly, but the highway continues as McKinney Street.
caption: Iowa 316 ends at the Runnells city limits
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