U.S. 151 was realigned from 1st Avenue through Cascade onto a freeway bypass built in 2002. AASHTO formally endorsed the 4.22 mile realignment on May 30, 2003. The former alignment was established as U.S. 151 Business by AASHTO on October 7, 2003. The application approval listed the route as 5.72 miles in length, but it only travels 3.0 miles from 234th Street at U.S. 151 to the west of Cascade to a parclo interchange joining U.S. 151 with Fox Street and CR Y13 (Farley Road) north.
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| U.S. 151 Business southbound begins at the parclo interchange (Exit 77) joining U.S. 151 with Fox Street and CR Y13 (Farley Road) north to Farley. 05/23/08 |
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| A loop ramp joins the south end of CR Y13 with U.S. 151 north 26 miles to Dubuque. 05/23/08 |
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| U.S. 151 Business turns west onto 1st Avenue E (old U.S. 151) a quarter mile south of the Cascade bypass. 05/23/08 |
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| A County Road Y13 pentagon directs motorists northward along Fox Street (U.S. 151 Business) from westbound 1st Avenue E. 05/23/08 |
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| 1st Avenue E angles southwest by an industrial park toward the Cascade residential street grid. 05/23/08 |
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| U.S. 151 Business makes an S-curve across the Maquoketa River North Fork into the Cascade business district. 05/23/08 |
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| U.S. 151 Business (1st Avenue W) south at Pierce Street. Cascade street suffixes change at the Maquoketa River North Fork. 05/23/08 |
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| 1st Avenue W at Buchanan Street in Downtown Cascade. 05/23/08 |
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| Upcoming Iowa 136 (Johnson Street) represents the main route north through the city of Cascade. 05/23/08 |
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| Iowa 136 meets U.S. 151 at a folded diamond interchange a half mile north of U.S. 151 Business and Downtown Cascade. 05/23/08 |
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| Iowa 136 travels north from Cascade to Worthington and Dyersville and south to Wyoming. 05/23/08 |
Page Updated 12-19-2019.
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