Chicago Transit Authority Bridge
Bascule drawbridgeChicago Transit Authority Bridge is a bascule drawbridge. Closed, its spans are charted from 18 ft to 35 ft of clearance, measured to the Great Lakes chart datum (IGLD 1985). Its open clearance is not charted.
Clearances are from NOAA chart US5CHIJL, measured to the Great Lakes chart datum (IGLD 1985). The clearance shown is the lowest charted for any of its spans. Actual clearance is lower whenever the water stands above that level. Always confirm against your vessel's air draft and the posted clearance gauge before transiting.
Pathr nautical charts
Chicago Transit Authority Bridge on the chart
Find the bridge and its charted vertical clearance in one view. Select a pin to compare nearby bridges, see open and closed clearances where charted, and open its operating details.
How to request an opening
We don't have this bridge's operating rule yet. Many drawbridges open on a schedule or need advance notice. Check 33 CFR 117 for Virginia or call the tender before you plan around it.
Frequently asked
What is the clearance under Chicago Transit Authority Bridge?+
Chicago Transit Authority Bridge is a bascule drawbridge. Closed, its spans are charted from 18 ft to 35 ft of clearance, measured to the Great Lakes chart datum (IGLD 1985). Its open clearance is not charted. These figures are from NOAA chart data. Real clearance drops whenever the water stands above the level they are measured to, so leave a margin for your air draft.
How do I get Chicago Transit Authority Bridge to open?+
Contact the bridge tender on VHF-FM, or sound the required signal. We don't have this bridge's operating rule yet. Many drawbridges open on a schedule or need advance notice. Check 33 CFR 117 for Virginia or call the tender before you plan around it.
