The Grand Haven Drawbridge
Last reviewed July 2026
The US-31 bascule bridge over the Grand River runs the daily rhythm for two groups at once: boaters waiting for a lift and drivers hoping the gates stay up. Its schedule is not a local arrangement; it is federal regulation, 33 CFR 117.633, and reading it precisely is worth more than any rule of thumb repeated at the fuel dock.
The Schedule in Plain Terms
In season, March 16 through December 14: the bridge opens for pleasure boats once an hour, on the half-hour, from 6:30 a.m. to 8:30 p.m., seven days a week.
Except these openings are skipped: 7:30 a.m., 12:30 p.m., and 5:30 p.m. on Monday, Tuesday, Thursday, and Friday; on Wednesday the skips fall at 7:30 a.m., 12:30 p.m., and 4:30 p.m.
Winter, December 15 through March 15: the bridge opens if at least 12 hours notice is given.
Always: public safety vessels, commercial traffic, and vessels in distress are passed as quickly as possible.
Source: 33 CFR 117.633, checked July 2026. The regulation controls if anything here has changed.
The Boater's Math
Two numbers decide whether the schedule matters to you at all. The bascule's closed vertical clearance is 25 feet above low water datum, per the Coast Pilot, so a boat under that air draft runs the river without ever requesting a lift. Above it, you live on the half-hours; miss one next to a blackout slot and the wait can stretch toward two hours.
Note the fine print in "above low water datum": clearance is measured from a fixed reference, while the water level moves. In a high-water year like 2020, the same bridge offers less air than the published figure. If your rig measures close to 25 feet, check current levels before assuming you fit; the water depths guide runs the same level arithmetic from the water's side, and the Spring Lake guide explains how this water rides on Lake Michigan.
The Driver's Math
Run the schedule backward and it becomes a commuting tool. The skipped openings sit squarely on the weekday peaks, morning, midday, and evening, which means the gates stay up when most people cross; the minutes surrounding every other half-hour are when US-31 risks stopping. On Wednesdays, remember the evening protection ends an hour early.
The stakes are not small. MDOT's corridor study calls US-31 the primary commercial, commuter, and tourist route on this stretch of shoreline, put daily traffic in the Grand Haven area at 28,000 to 58,500 vehicles as far back as 1997, and framed mobility in Ottawa County around capacity "across the Grand River." When the bridge misbehaves, the region feels it: local news has documented stuck-bridge closures in 2018, 2019, and 2021, with backups running miles, and MDOT officials told reporters the bridge sticks once or twice a year, usually early in the season.
If you are weighing an address north of the river, this schedule is part of the commute you are buying. Weigh it alongside the rest of the checks in the flooding and hidden risks guide before you commit.
The Bridge Itself
The survey at HistoricBridges.org documents the structure: built in 1960 by the American Bridge Company with engineering by Hazelet and Erdal of Chicago, carrying US-31 between Grand Haven and Ferrysburg. Its party trick is that it is really two bascule bridges sharing one substructure, so one direction of the highway can raise while the other stays down, which is exactly how crews reopened the sides separately during the 2018 malfunction.
Clearances and the 17-Foot Confusion
The Coast Pilot's structures table gives the bascule a 155-foot draw width and 25 feet of closed clearance. The stubborn local number "17 feet" belongs to a different bridge entirely: the fixed US-31 span over the shallow South Channel behind Harbor Island, where the crossings run 9 feet at Third Street, 9 feet at the rail line, and 17 feet at US-31, over a controlling depth of just 3 feet. Quote 17 feet for the drawbridge and you have merged two bridges into one; the Grand Haven Harbor guide keeps the two channels straight.
One more span shares the stack: the CSX railroad swing bridge downstream, which the federal text opens on signal in season and on 12 hours notice in winter, with 9 feet of clearance when closed. How the bridge normally sits and whether trains still cross is not stated in the regulation, so judge it with your own eyes on the day you transit. Boats bound for Spring Lake clear this stack plus the fixed 35-foot bridge at the lake's outlet channel.
Common Questions
How long can a boat wait at the Grand Haven drawbridge?
Up to about two hours in the worst case. Openings run once an hour on the half-hour in season, so an ordinary miss costs you under an hour. But if the next half-hour falls in a weekday blackout, say the 12:30 skip, the wait stretches across two cycles. Time your run at the river mouth against the printed schedule, not against hope.
Why is the Wednesday drawbridge schedule different?
The federal text simply sets Wednesday apart: the afternoon no-opening slot falls at 4:30 instead of the 5:30 used Monday, Tuesday, Thursday, and Friday. The rule offers no explanation, and none is needed to plan around it. If you boat on Wednesdays, shift your afternoon math an hour earlier.
Does the Grand Haven drawbridge open in winter?
Yes, on notice. From December 15 through March 15, both the bascule and the railroad bridge open if at least 12 hours notice is given. Public safety vessels, commercial traffic, and boats in distress are passed as quickly as possible at any time of year, in any season.
Do Spring Lake boats pass through the drawbridge?
Yes, despite local lore to the contrary. The route from Spring Lake to the big lake exits the channel under the fixed 35-foot Route 104 bridge, then runs down the Grand River through the drawbridge stack. The saving grace: the bascule gives 25 feet when closed, so most powerboats under that air draft never need an opening at all.
Keep Reading
The Grand Haven Harbor guide covers the working river the bridge crosses, the launches and marinas guide covers where to put in on either side of it, and the Spring Lake guide covers the water beyond the 35-foot gate.