Iowa Highway 187

Iowa Highway 187 (Iowa 187) is a highway in northeastern Iowa. It begins at U.S. Highway 20 (US 20) southwest of Masonville and ends at Iowa 150 south of Fayette.

Iowa Highway 187 marker

Iowa Highway 187

Iowa 187 highlighted in red
Route information
Maintained by Iowa DOT
Length28.385 mi[1] (45.681 km)
ExistedJanuary 1931 (1931-01)[2]–present
Major junctions
South end US 20 southwest of Masonville
Major intersections Iowa 3 southeast of Arlington
North end Iowa 150 south of Fayette
Location
CountryUnited States
StateIowa
Counties
Highway system
← Iowa 182→ Iowa 188
← Iowa 152Iowa 154→ Iowa 156

Route description

Iowa Highway 187 begins at an intersection with US 20 southwest of Masonville. It heads in a northward alignment from this point, passing through Lamont. North of Lamont, it intersects with Iowa 3 before turning to the northwest. The highway passes through Arlington before turning directly to the west. Further west, it will turn to the north where it will terminate at an intersection with Iowa 150 south of Fayette.

History

Iowa 187 was formed in January 1931. Originally, the highway began at an intersection with US 20 four miles (6.4 km) east of Winthrop. It headed north along a section line to Lamont. Just north of Lamont, the highway curved to the east and crossed into Delaware County. Shortly thereafter, the highway ended at the western gate of Backbone State Park.[3] The roadway maintained this configuration until July 1, 1980, when the east–west portion was turned over to the counties and Iowa 187 was rerouted north to the intersection between Iowa 3 and Iowa 154.[4][5] For a short time, both Iowa 187 and Iowa 154 ended at opposite sides of the same intersection, but Iowa 187 subsumed all of Iowa 154 by 1983.[6][7]

Major intersections
CountyLocationmi[1]kmDestinationsNotes
BuchananMiddlefield Township0.0000.000 US 20 – Waterloo, DubuqueInterchange
FayettePutnam Township15.57025.057 Iowa 3 – Strawberry Point, OelweinRoundabout
Smith Township28.38545.681 Iowa 150 – Maynard, Fayette
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. 2009 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2009. Retrieved January 15, 2011.
  2. Iowa State Highway Commission (1931). State of Iowa Transportation Map (PDF) (Map). Ames: Iowa State Highway Commission.
  3. "Primary Route Descriptions–Iowa 187 Delaware County". Iowa Department of Transportation. Retrieved May 8, 2015.
  4. "Primary Route Descriptions–Iowa 187 Buchanan County". Iowa Department of Transportation. Retrieved May 8, 2015.
  5. "Primary Route Descriptions–Iowa 187 Fayette County". Iowa Department of Transportation. Retrieved May 8, 2015.
  6. Iowa Department of Transportation (1981). State of Iowa Transportation Map (PDF) (Map). Ames: Iowa Department of Transportation. Retrieved May 8, 2015.
  7. Iowa Department of Transportation (1983). State of Iowa Transportation Map (PDF) (Map). Ames: Iowa Department of Transportation. Retrieved May 8, 2015.
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