{{Short description|State highway in Iowa}} {{Distinguish|U.S. Route 136 in Iowa}} {{Use American English|date=April 2025}} {{Use mdy dates|date=January 2025}} {{Infobox road |state=IA |type=IA |route=136 |map={{maplink-road|raw={{Wikipedia:Map data/Wikipedia KML/Iowa Highway 136}}}} |map_custom=yes |map_notes=Iowa 136 highlighted in red |length_mi=87.611 length_km=140.989 |length_ref=<ref name=IowaDOT>{{IowaDOT|2010-08-17|year=2009}}</ref> |direction_a=South |terminus_a={{Jct|state=IL|IL|136}} at the Illinois state line in Clinton |junction= *{{Jct|state=IA|US|67|GRR}} in Clinton *{{Jct|state=IA|US|61}} near Delmar *{{Jct|state=IA|US|151}} in Cascade |direction_b=North |terminus_b= {{Jct|state=IA|US|20|US|52}} in Dyersville |counties=Clinton, Jones, Dubuque |previous_type=US |previous_route=136 |next_type=IA |next_route=137 }} '''Iowa Highway 136''' ('''Iowa 136''') is a state highway maintained by the Iowa Department of Transportation. It runs for {{convert|87.611|mi|km}} in eastern Iowa. It begins at the Mississippi River in Clinton on the Mark Morris Memorial Bridge, where it continues as Illinois Route 136. It ends at an interchange with U.S. Highway 20 (US 20) and US 52 in Dyersville. Although signed as a north–south highway throughout, the highway runs east to west between Clinton and Oxford Junction, while turning north at Oxford Junction to complete its run to Dyersville. For most of its existence, Iowa 136 connected Clinton and Luxemburg. During the 1950s-1960s, the northern and southern ends of the route shifted slightly because nearby United States highways changed their alignments. The northern end of Iowa 136 shifted again in early 2022.
==Route description== Iowa Highway 136 begins on the Mark Morris Memorial Bridge over the Mississippi River at Clinton. It descends the approach to the bridge and intersects U.S. Highway 67 (US 67), which is running along N. Second Street. It turns to the north, overlapping US 67 for {{convert|3/4|mi}} until US 67 splits away at N. Third Street.<ref name="IowaDOT" /> From US 67, Iowa 136 goes west along Main Avenue and leaves town enters rural Clinton County.<ref name="DOT Clinton">{{cite map|publisher=Iowa Department of Transportation|title=Clinton|url=http://www.iowadotmaps.com/msp/pdf/current/clinton.pdf|access-date=August 24, 2010|year=2010}}</ref> It heads to the north-northwest for {{convert|10|mi}} towards Goose Lake along a narrow, curving stretch of road.
From Goose Lake, Iowa 136 continues to the west towards Delmar for {{convert|15|mi}}, passing through Charlotte along the way. Three miles (4.8 km) west of Delmar, it meets U.S. Highway 61 at a diamond interchange. This interchange is adjacent to the 61 Drive In outdoor movie theatre. It continues west through the small communities of Elwood and Lost Nation, before reaching Oxford Junction.<ref name="current DOT map">{{cite map|publisher=Iowa Department of Transportation|title=Transportation Map|url=http://www.iowadotmaps.com/msp/pdf/current/stmapmain.pdf|year=2010|section=L6:N4|access-date=August 24, 2010}}</ref>
At Oxford Junction, Iowa 136 turns to the north and travels {{convert|7|mi}} to Wyoming, where it meets Iowa Highway 64. For one mile (1.6 km), Iowa 64 and Iowa 136 overlap each other through Wyoming. On the western edge of the community, Iowa 136 splits away and travels north towards Onslow. North of Onslow, it passes through rural Jones County for {{convert|15|mi}}, crossing the Maquoketa River, before reaching Cascade and U.S. Route 151.<ref name="IowaDOT" />
Now in Dubuque County, Iowa 136 crosses the North Fork Maquoketa River and heads northwest towards Worthington. Five miles ({{convert|5|mi|disp=output only}}) later, it meets U.S. Highway 20 and U.S. Highway 52 at a partial cloverleaf interchange south of Dyersville.<ref name="IowaDOT" /> Prior to 2022, US 52 continued with Iowa 136 toward Luxemburg.
==History== In 1926, when Primary Road No. 20 (PR 20) was renamed U.S. Highway 61, Primary Road No. 61, which connected Clinton to US 61 west of Delmar, was renumbered Primary Road No. 136.<ref name="1926 Broer east">{{cite map|publisher=Rand McNally & Company|title=Junior Road Map: Eastern Iowa |url=http://www.broermapsonline.org/members/NorthAmerica/UnitedStates/NorthCentral/Iowa/unitedstates1926ra_045.html|year=1926|access-date=August 24, 2010}}</ref> In 1930, Iowa Iowa 136 had been extended west and north to what is now Iowa 64, replacing Iowa 153. Iowa 136 extended north to Onslow in 1931, and to Cascade in 1935. In 1938, Iowa 136 had been extended to Luxemburg, replacing Iowa 188. By 1947, only the PR 61 section of road and another section between Wyoming and Oxford Junction had been paved.<ref name=Rand1947>{{cite map|title=Road and Reference Atlas|year=1947|publisher=Rand McNally & Company|scale=1:1,077,120|pages=42–43|section=D10:E12<!--|access-date=August 24, 2010-->}}</ref> In Clinton, Iowa 136 originally began at the N. Third Street intersection with U.S. Highway 67. After U.S. Highway 30 was rerouted over the Gateway Bridge in 1955, Iowa 136 was extended to cross the Mississippi River over the Lyons-Fulton Bridge.<ref name=DOT1956>{{cite map|publisher=Iowa State Highway Commission|url=http://www.iowadotmaps.com/msp/historical/pdf/1956_back.pdf|inset=Clinton|title=Iowa State Highway Map|year=1956|access-date=August 24, 2010}}</ref> A year later, an Alternate U.S. Route 30 was designated over the old alignment of US 30 through Clinton, and Iowa 136 was pulled back to its old end.<ref name=DOT1957>{{cite map|publisher=Iowa State Highway Commission|url=http://www.iowadotmaps.com/msp/historical/pdf/1957_back.pdf|inset=Clinton|title=Iowa State Highway Map|year=1957|access-date=August 24, 2010}}</ref> In 1967, the Alternate US 30 designation was dropped and Iowa 136 again crossed the river.<ref name=DOT1968back>{{cite map|publisher=Iowa State Highway Commission|url=http://www.iowadotmaps.com/msp/historical/pdf/1968_back.pdf|inset=Clinton|title=Iowa State Highway Map|year=1968|access-date=August 24, 2010}}</ref>
From 1963 to 1967, U.S. Highway 52 was realigned from Dubuque to Luxemburg to follow U.S. Highway 20 to Dyersville and Iowa 136 to Luxemburg while its original alignment was rebuilt. During this time, Iowa 136 was truncated back to US 20 at Dyersville, but it was redesignated along this segment after US 52 returned to its old alignment.<ref name=DOT1964>{{cite map|publisher=Iowa State Highway Commission|url=http://www.iowadotmaps.com/msp/historical/pdf/1964_front.pdf|section=F24|title=Iowa State Highway Map|year=1964|access-date=August 24, 2010}}</ref><ref name=DOT1968>{{cite map|publisher=Iowa State Highway Commission|url=http://www.iowadotmaps.com/msp/historical/pdf/1968_front.pdf|section=F24|title=Iowa State Highway Map|year=1968|access-date=August 24, 2010}}</ref> Shortly after completion of the Southwest Arterial in Dubuque and subsequent rerouting of US 52 in 2021, Iowa 136 was truncated again back to US 20 in Dyersville.
==Major intersections== {{Jcttop|length_ref=<ref name=IowaDOT />}} {{Jctint |river=Mississippi River |lspan=2 |mile=0.000 |mspan=2 |road={{Jct|state=IL|IL|136|Lincoln||dir1=east|city1=Fulton}} |notes=Continuation in Illinois }} {{Jctbridge |mile=none |bridge=Mark Morris Memorial Bridge }} {{IAint |county=Clinton |cspan=3 |location=Clinton |lspan=2 |mile=0.465 |type=concur |road={{Jct|state=IA|US|67|GRR||Lincoln||dir2=south|name2=N. 2nd Street}} |notes=Southern end of US 67 overlap }} {{IAint |mile=1.123 |type=concur |road={{Jct|state=IA|US|67|GRR|dir2=north|name2=N. 3rd Street}} |notes=Northern end of US 67 overlap }} {{IAint |location=Delmar |mile=30.427 |road={{Jct|state=IA|US|61|city1=Maquoketa|city2=DeWitt}} }} {{IAint |county=Jones |cspan=2 |location=Wyoming |lspan=2 |type=concur |mile=53.962 |road={{jct|state=IA|IA|64|dir1=east|name1=Main Street|city1=Maquoketa}} |notes=Southern end of Iowa 64 overlap }} {{IAint |type=concur |mile=54.924 |road={{jct|state=IA|IA|64|dir1=west|name1=Main Street|city1=Anamosa}} |notes=Northern end of Iowa 64 overlap }} {{IAint |county=Dubuque |cspan=3 |location=Cascade |mile=73.528 |road={{Jct|state=IA|US|151|city1=Cedar Rapids|city2=Dubuque}} }} {{IAint |location=Dyersville |mile=87.611 |road={{Jct|state=IA|US|20|US|52|dir2=south|city1=Waterloo|city2=Dubuque}}<br>{{Jct|state=IA|US|52|dir1=north|city1=Decorah}} |notes=New northern end; former southern end of US 52 overlap }} {{IAint |location=Luxemburg |type=closed |mile=97.733 |road={{jct|state=IA|US|52|dir1=north|name1=Andre Street|IA|3|name2=Main Street|city1=Guttenberg|city2=Colesburg|city3=Dubuque}} |notes=Former northern end; former northern end of US 52 overlap }} {{Jctbtm|keys=concur,closed}}
==External links== {{Attached KML}} *[http://www.iowahighways.org The Iowa Highways Page]
==References== {{reflist}}
Category:Transportation in Dubuque County, Iowa 136 Category:Transportation in Clinton County, Iowa Category:Transportation in Jones County, Iowa