Iowa Highways: 70 to 79

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60-69 70 71 72 73 74 75 76 77 78 79 80-89
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Iowa 70 (I)
Designated: July 1, 1920
Decommissioned: 1967
Original western terminus: Macksburg
Original eastern terminus: IA 15 (later IA 16, then US 169). It was extended along part of old 16 in 1928 after its relocation and was straightened in 1932.
Counties: Madison
Paving history: There were no paved segments, and the road was gravel until 1968 (after its decommissioning).
Replaced by: County Road G41
Iowa 70
Length: 24 miles/39 kilometers
Northern terminus: US 6 in West Liberty
Southern terminus: IA 92 in Columbus Junction
Terminus photos

Counties: Muscatine, Louisa
Cities along route: West Liberty, Nichols, Conesville, Columbus Junction

Multiplexes: 3 miles with IA 22, to the east of Nichols
History
Designated: January 1, 1969, replacing IA 76 (I)
Paving history: The entire road was paved at the time of designation except for the short segment between Columbus Junction and Columbus City, which had a bituminous surface at the time of its decommissioning.
Major alignment changes:
  • December 2, 1994: 2-mile segment from downtown Columbus Junction to Columbus City was decommissioned after an east bypass of CJ opened to create a direct connection with IA 92 (before it was built, 92 passed over 70, and traffic from 92 had to use two blocks of city streets to access 70). The old segment became unsigned IA 947, but from December 1, 1997, until July 1, 2003, only the 0.7-mile segment between CJ's south city limits and 70's former south terminus carried that designation. It is now under local control.
  • Iowa 71
    Designated: July 1, 1920
    Decommissioned: October 16, 1926
    Original northern terminus: IA 3 (now IA 2) in eastern Appanoose County
    Original southern terminus: Moulton
    Paving history: There were no paved segments.
    Replaced by: IA 142 (I); the number has since been used for US 71.
    Iowa 72
    Designated: July 1, 1920
    Decommissioned: April 1, 1986 (see note)
    Original western terminus: IA 15 (later US 69) in eastern Wright County. Between 1928 and 1933 it was shifted to a point west of Galt, but the straight east-west alignment was restored after IA 262 was designated as the spur to Galt on May 9, 1933.
    Original eastern terminus: Dows; it was extended eastward to I-35 (exit #159) on July 1, 1980.
    Counties: Wright, Franklin
    Paving history: There were no paved segments at designation. The segment from IA 15 (US 69) to Dows was paved in 1933, and the 1980 extension was entirely paved.
    Replaced by: County Road C54 west of Dows and C47 east of Dows
    Note: Wright and Franklin counties took over their shares of IA 72 on April 1, 1986, but the city of Dows took over its piece on November 1, 1985. The segment from Dows to I-35 did not appear on the 1986 state transportation map.
    Former terminus photos
    Iowa 73 (I)
    Designated: July 1, 1920
    Decommissioned: September 15, 1934
    Original western terminus: IA 6 (later US 30) at Belle Plaine. It was extended northward to IA 8 at Dysart on December 5, 1933, replacing the original IA 212.
    Original eastern terminus: IA 7 (later US 32, then US 6) at Marengo
    Counties: Tama (1933-1934), Benton, Iowa
    Paving history: Unpaved at designation, the segment from Belle Plaine to the Benton/Iowa county line was paved in 1921.
    Replaced by: IA 212.
    Note: The June 1, 1934, state highway map shows IA 212 in the former IA 73's place, but Jeff Morrison found out through newspaper research that the original IA 73's signs were not taken down until mid-September. This means that two IA 73's existed for a few months in 1934 as the second IA 73 (see below) was designated in April.
    Iowa 73 (II)
    Designated: April 1934 (number approved March 28)
    Decommissioned: December 1934
    Original northern terminus: Minnesota state line south of Worthington, MN
    Original southern terminus: Missouri state line south of Shenandoah
    Counties: Osceola, O'Brien, Cherokee, Ida, Crawford, Shelby, Pottawattamie, Mills, Fremont, Page
    Paving history: The only paved segments were from Sanborn to the split with IA 10 north of Calumet and from Denison to Avoca.
    Replaced by: US 59. It replaced IA 21 (I) north of Denison and IA 4 (I) south of there.
    After a coalition to get this corridor onto the US highway system met in Harlan on March 23, 1934, the states of Iowa, Minnesota, and Missouri agreed to create a common state highway 73 as an attempt to convince the American Association of State Highway Officials to extend US 73 from Atchison, KS. While the number fit perfectly into the numbering grid between US 71 and US 75, US 73 had already been designated in Nebraska by June of that year. In December 1934, US 59 was designated in its place instead.
    Iowa 73 (III)
    Designated: January 8, 1936
    Decommissioned: April 12, 1972
    Original northern terminus: IA 141 in Coon Rapids
    Original southern terminus: IA 64 (later IA 44)
    Counties: Carroll, Guthrie
    Paving history: There were no paved segments at designation, and the road remained gravel until it was paved after decommissioning.
    Replaced by: County Road N46
    Iowa 74 (I)
    Designated: July 1, 1920
    Decommissioned: September 1941
    Original western terminus: IA 7 in Iowa City; it was truncated at Tipton on October 16, 1926
    Original eastern terminus: IA 20 (later US 61) in Davenport
    Counties: Johnson (1920-1926), Cedar, Scott
    Paving history: There were no paved segments at designation.
  • 1921: Paved from a county road (now Y52) east of Maysville to Davenport
  • 1922: Paved from a point west of Maysville to the county road
  • 1923: Paved from the Cedar/Scott county line near New Liberty to a point west of Maysville
  • 1936: Paved from Tipton to Cedar County Road H (now Y14) north of Bennett
  • 1940: Last segment, from County Road H to the Cedar/Scott county line, paved

  • Replaced by:
  • IA 139 (I) (between Iowa City and IA 38 in 1926)
  • IA 38 (duplicated segment south of Tipton in 1926)
  • IA 150 (at decommissioning)

  • For city street alignments in Davenport, see the Highways of Davenport and Bettendorf page.
    For a map of its estimated street alignment in Iowa City, see the Highways of Iowa City page.
    Iowa 74 (II)
    Designated: 1941
    Decommissioned: November 9, 1966
    Original northwestern terminus: Palo
    Original southeastern terminus: US 151 in downtown Cedar Rapids
    Counties: Linn
    Paving history: There were no paved segments at designation, and the road remained gravel until it was paved in 1956. (The road was realigned to run west of Palo as part of the paving, creating IA 399 to serve Palo.)
    Replaced by: IA 94 (II); the renumbering was necessary to make room for I-74.
    For city street alignments in Cedar Rapids, see the Highways of Cedar Rapids page.
    Iowa 75
    Designated: July 1, 1920
    Decommissioned: October 16, 1926
    Original northern terminus: Marcus
    Original southern terminus: IA 5
    Counties: Cherokee
    Paving history: There were no paved segments.
    Replaced by: IA 143; number has since been used for US 75
    Iowa 76 (I)
    Designated: July 1, 1920
    Decommissioned: January 1, 1969
    Original northern terminus: IA 7 (later US 32, then US 6) in West Liberty
    Original southern terminus: IA 20 (later US 61) in Wapello; it was truncated south of Columbus City on January 17, 1933
    Counties: Muscatine, Louisa
    Paving history: There were no paved segments at designation. The segment from West Liberty to Columbus Junction was paved in 1955; the segment between Columbus Junction and Columbus City had a bituminous surface at decommissioning.
    Replaced by: County roads, now numbered X37 and G62 (south of Columbus City in 1933); IA 70 (at decommissioning)
    Iowa 76
    Length: 49 miles/79 kilometers
    Northern terminus: Minnesota state line south of Eitzen, MN; continuation of MN 76
    Southern terminus: US 18 west of McGregor
    Terminus photos

    Counties: Allamakee, Clayton
    Cities along route: Waukon, Marquette, McGregor

    Multiplexes:
  • 2 miles with IA 9 south of Waukon
  • History
    Designated: January 1, 1969, to a former segment of IA 13 from the Minnesota state line to Marquette
    Paving history: The entire road was paved at the time of designation except for the segment between IA 364 and Marquette, which had a bituminous surface until it was paved in 1971.
    Major alignment changes:
  • November 16, 1989: Extended southward and westward along four miles of old US 18 to connect with the west end of the US 18 bypass around Marquette and McGregor. (This segment was originally signed only as Business US 18, with IA 76 shields appearing only above the mile markers. However, IA 76 is now fully signed along this segment.)
  • Iowa 77
    Designated: July 1, 1920
    Decommissioned: July 1, 2003
    Original northern terminus: Keota. It was truncated to the relocated IA 2 on August 22, 1922, but re-extended to Keota on April 21, 1924.
    Original southern terminus: IA 8 (I), now US 34, in Fairfield; it was truncated at IA 11 (later IA 1) near Richland on January 6, 1925. By January 23, 1963, it was truncated at IA 78 (the legal description approved on that date did not mention any segments south of Richland; Highway Commission county maps from 1955 and 1957 showed a multiplex of IA 77 and IA 78 west of IA 1, but this multiplex did not appear on state maps. It was truncated at IA 92 in eastern Keokuk County on July 29, 1980 (the city of Richland took over its share of the road on August 8).
    Counties: Keokuk, Jefferson (1920-1941)
    Paving history: There were no paved segments at designation.
  • 1961: Paved from IA 92 to IA 78 at Richland
  • 1968: Last segment, from Keota to IA 92, upgraded from bituminous to paved
  • Replaced by:
  • IA 11 (duplicated segment north of Fairfield in 1925)
  • County Road W15 (segment between IA 92 and IA 78 in 1980, and the north-south segment north of IA 92 at decommissioning)
  • Local road (Broadway Avenue in Keota, for the east-west segment at decommissioning)
  • Terminus photos
    Iowa 78
    Length: 59 miles/95 kilometers
    Western terminus: IA 149 east of Martinsburg
    Eastern terminus: US 61 east of Morning Sun
    Terminus photos

    Counties: Keokuk, Washington, Jefferson, Henry, Louisa
    Cities along route: Richland, Brighton, Coppock, Wayland, Olds, Morning Sun

    Multiplexes:
  • 7½ miles with IA 1, from east of Richland to Brighton
  • History
    Designated: July 1, 1920, as a spur from IA 40 (now US 218) in Henry County into Winfield.
    Paving history: There were no paved segments at designation.
  • 1953: Paved from IA 249 south of Winfield to Morning Sun
  • 1955: Paved from IA 1 at Brighton to IA 249 and from Morning Sun to US 61
  • 1966: Last segment, from IA 149 to IA 1, upgraded from bituminous to paved

  • Major alignment changes:
  • March 19, 1930: Extended eastward from south of Winfield to US 61 (the short spur to Winfield would become IA 249 in 1931)
  • December 1, 1930: Extended westward from US 161 to Wayland
  • November 9, 1948: Extended westward from Wayland to IA 149, following part of IA 77 and replacing part of IA 304. (Per the legal descriptions, the state assumed maintenance on the section between IA 149 and IA 1 on June 25, 1948. The segment east of the IA 1 split was completed on November 9.)
  • Iowa 79 (I)
    Designated: July 1, 1920
    Decommissioned: July 28, 1980 (the city of Bonaparte took over its piece on August 1)
    Original northern terminus: Bonaparte
    Original southern terminus: IA 3 (later IA 2) northwest of Farmington
    Counties: Van Buren
    Paving history: Unpaved at designation, the road was paved in 1930.
    Replaced by: County Road W40
    Note: The state took over jurisdiction of the second IA 79 in Des Moines County on July 1, 1980, meaning that two IA 79's may have existed for a brief period.
    Iowa 79 (II)
    Designated: July 1, 1980
    Decommissioned: July 1, 2003
    Original western terminus: Geode State Park
    Original eastern terminus: US 34 in Middletown; this road also served the Iowa Army Ammunition Plant
    Counties: Des Moines
    Paving history: The entire road was paved at the time of designation.
    Replaced by: County Road J20, its pre-1980 designation. For the first two years after IA 79 was decommissioned, Des Moines County kept the state highway numbers for all of its former state highways rather than assimilate them into the alphanumeric county road system; thus IA 79 became County Road 79. Pentagon County Road 79 markers were placed at the junction with US 34 by December 2004, but they were replaced by J20 markers in October 2005.
    Terminus photos

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