B08_Attach_1_Drawings_YELL_338223.pdf

This is a set of construction drawings for the FY 26 Bridge Preservation project at Yellowstone National Park, specifically addressing erosion and sediment control, bridge repairs, and maintenance work across three bridges: Lava Creek Bridge (1570-022P), Thumb Creek Bridge (1570-029P), and Unnamed Creek Bridge (1570-030P).

The project encompasses comprehensive bridge restoration and preservation work including removal and replacement of deteriorated concrete curbs and bridge railings, repair of bridge decks and overhangs, concrete spall repairs, asphalt overlay and patching at bridge approaches, erosion protection installation at abutments and embankments, installation of riprap and slope protection, removal of temporary barriers, restoration of drainage systems, and restriping of center line and edge markings. Additional work involves hydro-demolition of bridge decks where needed, replacement of expansion joints, repair of bridge deck drainage systems, masonry wall repairs at abutments, and stone facing restoration. The contractor must implement erosion and temporary sediment control measures (TESC) including vehicle tracking mats, temporary stream diversions, silt fences, and sediment control logs. Work area isolation protocols require limiting disturbance to designated areas with defined construction fences and limits of disturbance marked on the detailed site plans. The drawings include specific details for concrete repair classifications, galvanic anode protection specifications, paint colors (federal paint standard AMS-STD-595A-20062), and temporary traffic control measures using standard MUTCD signage, channelizing devices, and flagging operations. All work must comply with federal, state, and local environmental regulations, with coordination required between the contractor and the National Park Service.