- US WaBuPNRA D0027-004-009-008-001-BB017990
- Item
- 1917
Part of Timothy Miller Collection
Northern Pacific Engineering Drawing: Detail of Abutment, Bridge 21 - Irrigation Canal, west of Laurel, Montana, Line Segment 041, Milepost 21.9. Sheet 1056 - 17, 1917. Note: Concrete slab