Specifications include, but are not limited to: STPP 29-2(4)66 - Mill, Fill, Seal & Cover, Guardrail, Culverts, Digout Excavation, Rumble Strips, Signing, Revise Bridge Rail ? Thrie Beam, & Anchor Posts on the Cactus JCT ? Silver Bow Co. project in Jefferson & Silver Bow Counties. The project is located on P-29 beginning just west of the JCT with MT-41 at RP 65.68 approximately 9 miles west of Whitehall and extends west to the Jefferson/Silver Bow County Line at RP 75.59 approximately 14 miles southeast of Butte.STPP 29-1(66)57 - Seal & Cover, Guardrail, Pavement Markings, & Signing on the JCT MT-55 ? North (MT-41) project in Jefferson, Silver Bow & Madison Counties. The project is located 3.8 miles northeast of Silver Star on Mt-41 beginning at the JCT of MT-41 and MT-55 and proceeds north 8.3 miles to JCT MT-41 and MT-2.