| 2012-12-A-053 U.S. Route 181 | N/A | N/A | N/A | Establish new right of way as a state route for drainage facilities and safety improvements. PR: 9/9/27 page 26; 92-09-A-34 dated 9/18/92; 2004-08-A-037 dated 8/20/04. S33;T17S; R25E; S32; T17S; R26E; S5&9; T18S; R26E. Additonal old route U.S. 666 |
| 1993-02-A-013 State Route 181 | N/A | N/A | N/A | ESTAB. & ACQ. ADD. R/W FOR DRAINAGE ESMT. FOR OUTLET FROM PIPE TO EXIST. WASH PRIOR RESOS. 2/36 & 5-8-36. |
| 1970- -019 State Route 181 | N/A | N/A | N/A | ESTABLISH & DESIGNATE AS STATE HIGHWAY WITH APPROVAL TO ACQUIRE R/W FOR BRIDGE & APPROACHES. |
| 1961- -053 State Route 181 | N/A | N/A | N/A | IMPROVE PORTION OF HIGHWAY 1 MILE EAST OF JCT WITH S.R. 186. |
| 1953-P-029 State Route 181 | N/A | N/A | N/A | ACQ. ADD. R/W TO REFENCE HWY FROM JCT. U.S.666 NE TO NE COR. SEC. 32, T16S, R29E. |
| 1947-P-256 State Route 181 | N/A | N/A | N/A | ALTER PORTION OF HWY FROM W 1/4 COR SEC. 10, T18S, R26E NE TO NE COR SEC. 32, T16S, R29E |