:Missouri Route 121

File:MO 121 in Wallace State Park.jpg

All of the route is located in Clinton County. Route 121 begins at a T-intersection at US 69, south of Cameron and US 69's interchange with Interstate 35 near the city. The route travels eastwards over Christman Brook, and it enters a mixture of farmland and forests.{{Google maps|url=https://maps.google.com/maps?saddr=US-69+S&daddr=MO-121+S&hl=en&sll=39.661808,-94.224243&sspn=0.020516,0.035448&geocode=FfAxXQIdyBNi-g%3BFbosXQIdkmti-g&t=h&gl=us&mra=mift&mrsp=1&sz=15&z=15|access-date=July 22, 2012}} The road intersects Northeast Jones Road, which is concurrent with the route for {{convert|0.251|mi|km}}. Route 121 shifts north temporarily, and it intersects Northeast Jones Road, the end of the concurrency. The road then borders Wallace State Park and crosses over Deer Creek. Travelling through a forest, the route turns southeastward near the park entrance. Route 121 ends at a Y-intersection with the park entrance and Route HH, a supplemental route. The road continues eastward as Route HH, which ends at Route 13 in Kingston.

Route 121 is designated as a major collector route by the Missouri Department of Transportation (MoDot).{{Cite map|url=http://www.modot.org/newsandinfo/functionalclassificationmaps/documents/ClintonCounty.pdf|title=Rural Functional Classification - Clinton County|publisher=Missouri Department of Transportation|author=Missouri Department of Transportation|date=March 21, 2013|access-date=May 13, 2018}} In 2016, MoDOT calculated 627 vehicles, including 32 trucks travelling on Route 121 east of US 69. This is expressed in terms of annual average daily traffic (AADT), a measure of traffic volume for any average day of the year.{{Cite map|publisher=Missouri Department of Transportation|title=Northwest District Travel Volume and Commercial Vehicle Count Map|url=http://www.modot.org/safety/documents/2016_Traffic_NW.pdf|access-date=May 13, 2018|date=2016|author=Missouri Department of Transportation}} Although the route travels in an east–west fashion, MoDot has designated it as a north–south route.

In October 1935, the Missouri State Highway Commission announced a project to construct Route 121AP from US 69 to Wallace State Park. The project included grading of the route, culverts, bridges, and gravel pavement. The projected route was {{convert|1.619|mi|km}} long.{{cite news|title=State Road Work: Notice to Contractors|url=https://www.newspapers.com/clip/20035697/|access-date=May 13, 2018|work=The Lathrop Optimist|date=October 10, 1935|page=4|via=Newspapers.com}} {{free access}} Gerard Knutson of Kansas City received the contract for the project, with the lowest bid of $20,614 ({{Inflation|US|20614|1935|fmt=eq}}).{{cite news|title=Contracts Let for Roads|url=https://www.newspapers.com/clip/20035827/|access-date=May 13, 2018|work=The Lathrop Optimist|date=October 17, 1935|page=1|via=Newspapers.com}} {{free access}} Approval of the project was given by Franklin D. Roosevelt by October 31, with a new price of $18,000 ({{Inflation|US|18000|1935|fmt=eq}}).{{cite news|title=President Approves Roads|url=https://www.newspapers.com/clip/20035941/|access-date=May 13, 2018|work=The Cameron Sun|date=October 31, 1935|page=1|via=Newspapers.com}} {{free access}} Construction started on November 25, by the Joe Pohl Construction Company. Workers were employed one week before construction, allocated to building the bridge near the park. The project allowed federal work to start for the park,{{cite news|title=Work Going Strong On The Park Road|url=https://www.newspapers.com/clip/20036049/|access-date=May 13, 2018|work=The Cameron Sun|date=November 28, 1935|page=1|via=Newspapers.com}} {{free access}} and the finished road was reflected in the 1936 state map as Route 121.{{Cite map|url=http://www.modot.org/historicmaps/documents/1935002_reduced.pdf|title=Map of Missouri Showing State Road System|publisher=Missouri State Highway Commission|author=Missouri State Highway Commission|date=1935|access-date=February 7, 2018|archive-url=https://web.archive.org/web/20120913005450/http://www.modot.org/historicmaps/documents/1935002_reduced.pdf|archive-date=September 13, 2012|url-status=dead}}{{Cite map|url=http://www.modot.org/newsandinfo/publications/documents/1936.pdf|title=Map of Missouri Showing State Road System|publisher=Missouri State Highway Commission|author=Missouri State Highway Commission|date=1936|access-date=February 7, 2018|archive-url=https://web.archive.org/web/20120913010137/http://www.modot.org/newsandinfo/publications/documents/1936.pdf|archive-date=September 13, 2012|url-status=dead}} The route was paved in asphalt by 1949.{{Cite map|url=http://www.modot.org/newsandinfo/publications/documents/1945_1946_front.pdf|title=Map of Missouri's State Highway System|publisher=Missouri State Highway Commission|author=Missouri State Highway Commission|date=1945–1946|access-date=May 13, 2018}}{{Cite map|url=http://www.modot.org/newsandinfo/publications/documents/1948_1949_front.pdf|title=Map of Missouri Showing State Road System|publisher=Missouri State Highway Department|author=Missouri State Highway Department|date=1948–1949|access-date=May 13, 2018|archive-url=https://web.archive.org/web/20120916180703/http://www.modot.org/newsandinfo/publications/documents/1948_1949_front.pdf|archive-date=September 16, 2012|url-status=dead}}

{{Jcttop|state=MO|county=Clinton|length_ref=}}

{{MOint

|location=none

|mile=0.000

|road={{Jct|state=MO|US|69}}

|notes=Southern terminus

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{{Jctint

|location_special=Wallace State Park

|mile=1.258

|road={{Jct|state=MO|Supp|HH}}

|notes=Northern terminus at entrance to Wallace State Park; Western terminus of Route HH

}}

{{Jctbtm}}

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{{commons category|Missouri Route 121}}

{{Attached KML|display=title,inline}}

• [https://mostateparks.com/park/wallace-state-park Wallace State Park]

121

Category:Transportation in Clinton County, Missouri