Navigating the SH 146 Bridges South Channel Obstructions

Current (4/30/2021) Closure Schedule • MSIB to be issued by USCG soon for May 2021 Closures – Both N & S Channel Open through 5/7 – Girders to be installed over both channels 5/8 – 5/22 Period Channel Closed Purpose 5/8 -5/9 North Crane mobilizes to N. Channel 5/10 North Beams set above N. Channel 5/11 South Beams set above S. Channel 5/12 -5/14 Both N & S Beams set on spans over both channels 5/15 North South Channel opens by 0900 hrs 5/16 North South Channel open all day 5/17 -5/21 Both N & S Beams set on spans & arterials both channels 5/22 Both N & S Demobilize and reopen both channels 5/23 None Both Channels Open

Side Scan Sonar Image of S. Channel – North Side Depths (by Center Support) Bridge Suppor t Piling s Piling 7. 498 ft below surface 4. 02 ft below surface

Side Scan Sonar Image Showing S. Channel – North Side Distances 28. 7 ft from base of center support 13. 1 ft from base of center support

Side Scan Sonar image S. Channel – South Side Depths (Kemah Side) 4. 05 ft below surface 9. 53 ft below surface

Side Scan Sonar Image S. Channel – South Side Distances 30 ft 52 ft

South Channel Obstructions Locations Estimated – New fenders shown Red dots indicate obstructions less than 10 ft below surface Green dots indicate obstructions more than 10 ft below surface

Safe Route

Buoys Marking Obstructions (Looking W)