AARoads Forum

National Boards => Bridges => Topic started by: webny99 on January 31, 2021, 01:49:02 PM

Title: Bridges over Islands
Post by: webny99 on January 31, 2021, 01:49:02 PM
I'm looking for examples of where a bridge crosses an island without ever touching ground level on that island, or having any access to that island whatsoever. A local example is here (https://www.google.com/maps/@43.1627253,-77.6158494,3a,75y,126.97h,80.44t/data=!3m8!1e1!3m6!1sAF1QipNA5TqIw14u_rv2_7z90Vm4vM8IKZ1a9bTdNZlm!2e10!3e11!6shttps:%2F%2Flh5.googleusercontent.com%2Fp%2FAF1QipNA5TqIw14u_rv2_7z90Vm4vM8IKZ1a9bTdNZlm%3Dw203-h100-k-no-pi-0-ya321.0962-ro-0-fo100!7i10240!8i5120!5m1!1e1), on the Pont de Rennes bridge which was formerly a road but is now foot and bike traffic only. As you can see, the bridge crosses the island and both forks of the river without access to the island. Curious to know what other examples exist, I'm sure there are plenty on the actual road system and not just a pedestrian bridge.
Title: Re: Bridges over Islands
Post by: 1 on January 31, 2021, 02:12:54 PM
I-84 where it almost enters New Jersey.
Title: Re: Bridges over Islands
Post by: TheHighwayMan394 on January 31, 2021, 02:36:03 PM
The Hennepin Avenue Bridge in Minneapolis crosses the Mississippi River through Nicollet Island. Ground access is made crossing a channel on Merriam Street.
Title: Re: Bridges over Islands
Post by: M3100 on January 31, 2021, 04:53:40 PM
Roosevelt Island east of Manhattan in New York City.  New York SR 25 (Ed Koch Queensboro Bridge) passes over it but does not have any offramps.  Access to the island by vehicle is from Long Island City via the Roosevelt Island bridge.  There is also a tramway and ferry access.
Title: Re: Bridges over Islands
Post by: webny99 on January 31, 2021, 05:18:40 PM
I-84 where it almost enters New Jersey.

That isn't technically an island, but since it's a long peninsula and there's no direct access, it's close enough.


The Hennepin Avenue Bridge in Minneapolis crosses the Mississippi River through Nicollet Island. Ground access is made crossing a channel on Merriam Street.

That's the general idea, but from what I can tell, Nicollet Island is also accessible directly from Wilder St (eastbound) and De La Salle Dr (westbound). I actually found a better Twin Cities example here (https://www.google.com/maps/@44.9413715,-93.0910676,3a,75y,348h,80.68t/data=!3m6!1e1!3m4!1sp9m3nOnHLngDQIFq6JUBng!2e0!7i13312!8i6656!5m1!1e1), where Wabasha St. crosses the Mississippi via Raspberry Island with no direct access (although there does appear to be pedestrian access, visible here (https://www.google.com/maps/@44.9421803,-93.0911995,3a,75y,330.81h,108.11t/data=!3m6!1e1!3m4!1sjZSfAaZ9CguRjmih54FQYg!2e0!7i13312!8i6656!5m1!1e1)). Two new bucket list items!


Roosevelt Island east of Manhattan in New York City.  New York SR 25 (Ed Koch Queensboro Bridge) passes over it but does not have any offramps.

Great example, I should have thought of that one when composing my post!

Title: Re: Bridges over Islands
Post by: 1995hoo on January 31, 2021, 05:35:42 PM
The Theodore Roosevelt Bridge (I-66 and US-50) in the District of Columbia passes over the southern end of the island of the same name with no access.
Title: Re: Bridges over Islands
Post by: BrianP on January 31, 2021, 05:55:31 PM
US 50 crosses the Ohio River including Blennerhassett Island.
Title: Re: Bridges over Islands
Post by: plain on January 31, 2021, 05:58:26 PM
US 1/301 crosses Belle Isle in Richmond with no access, but there's a foot bridge hanging under it that provides access for pedestrians.
Title: Re: Bridges over Islands
Post by: jmd41280 on January 31, 2021, 08:52:49 PM
I-76/PA Turnpike crosses directly over Fourteen Mile Island in the Allegheny River northeast of Pittsburgh.
Title: Re: Bridges over Islands
Post by: BrianP on January 31, 2021, 11:12:14 PM
I-76/PA Turnpike crosses directly over Fourteen Mile Island in the Allegheny River northeast of Pittsburgh.
It also crosses Calver Island when crossing the Susquehanna River. 

I-81 crosses McCormick Island when crossing the Susquehanna as well.
Title: Re: Bridges over Islands
Post by: kenarmy on January 31, 2021, 11:38:39 PM
https://www.google.com/maps/@30.1773931,-90.4454795,737m/data=!3m1!1e3

Idk if this counts as swampy land but 55 passes over several tiny islands.
Title: Re: Bridges over Islands
Post by: Roadrunner75 on January 31, 2021, 11:46:07 PM
Roosevelt Island east of Manhattan in New York City.  New York SR 25 (Ed Koch Queensboro Bridge) passes over it but does not have any offramps.  Access to the island by vehicle is from Long Island City via the Roosevelt Island bridge.  There is also a tramway and ferry access.
Yes, but it actually used to at one point.  There was an elevator for awhile to bring cars and pedestrians down to the island before the bridge between the island and Queens was built.
Title: Re: Bridges over Islands
Post by: CoreySamson on February 01, 2021, 01:21:36 AM
I-40 over Mud Island in Memphis almost counts, except Mud Island is not an island.

I-210 in Lake Charles passes over a small uninhabited island.

I-10 also does crossing the Lost River east of Houston.
Title: Re: Bridges over Islands
Post by: CtrlAltDel on February 01, 2021, 05:30:51 AM
I thought there would be one somewhere along US-1 in the Florida Keys, but unless I've missed something, there isn't.
Title: Re: Bridges over Islands
Post by: jmacswimmer on February 01, 2021, 11:17:56 AM
The US 40 Hatem Bridge & the CSX railroad bridge both pass over Garrett Island while crossing the Susquehanna River.

https://www.google.com/maps/@39.5639656,-76.0909528,2521m/data=!3m1!1e3!5m1!1e1?hl=en
Title: Re: Bridges over Islands
Post by: GaryV on February 01, 2021, 12:52:15 PM
The International Bridge between Sault Ste Marie MI and ON crosses over several islands without access, both natural and manmade (including the portion of SSM MI that is an island because of the power canal).  But the bridge supports touch the islands, so I don't know if that meets your criteria of "without ever touching ground level on that island".
Title: Re: Bridges over Islands
Post by: webny99 on February 01, 2021, 01:12:05 PM
Idk if this counts as swampy land but 55 passes over several tiny islands.

That's an interesting one. It's technically a little different than what I was looking for, but it definitely fits in spirit. I would love to drive that section of I-55 some day.


The International Bridge between Sault Ste Marie MI and ON crosses over several islands without access, both natural and manmade (including the portion of SSM MI that is an island because of the power canal).  But the bridge supports touch the islands, so I don't know if that meets your criteria of "without ever touching ground level on that island".

Absolutely. I mostly just meant without road access, but preferably as an actual bridge instead of crossing at ground level.

And speaking of international border crossings... The Thousand Islands Bridge (https://www.google.com/maps/@44.3601742,-75.9803542,16z/data=!5m1!1e1?hl=en) (ON 137) also crosses multiple islands. And then you've got another really interesting case with the Peace Bridge (https://www.google.com/maps/@42.9065018,-78.9026143,3a,43.2y,193.61h,84.45t/data=!3m6!1e1!3m4!1s8BPF-UWECuA5sHVmnOaG4A!2e0!7i13312!8i6656!5m1!1e1?hl=en), which crosses the Bird Island Pier, which is itself an extension of Unity Island, as shown in satellite view here (https://www.google.com/maps/@42.9175242,-78.8949943,3861m/data=!3m1!1e3!5m1!1e1?hl=en).
Title: Re: Bridges over Islands
Post by: kurumi on February 01, 2021, 01:12:52 PM
On Hollyhock Island in Norwich, CT, you're looking up at CT 32/82 westbound with no access. (EB is at ground level)

https://goo.gl/maps/wJE92qfXQa4S4awS6
Title: Re: Bridges over Islands
Post by: webny99 on February 02, 2021, 10:21:55 PM
I thought there would be one somewhere along US-1 in the Florida Keys, but unless I've missed something, there isn't.

In that case it kind of makes sense that US 1 crosses all the islands at ground level, because it's the main route used to access the islands in addition to connecting them. You could possibly make a case for Missouri Key, but other than that they all have connecting roads.
Title: Re: Bridges over Islands
Post by: jmacswimmer on February 02, 2021, 11:19:19 PM
No one yet mentioned the Thomas Hatem Bridge between Havre de Grace, MD and Perryville, MD on US 40.

See reply 14:

The US 40 Hatem Bridge & the CSX railroad bridge both pass over Garrett Island while crossing the Susquehanna River.

https://www.google.com/maps/@39.5639656,-76.0909528,2521m/data=!3m1!1e3!5m1!1e1?hl=en
Title: Re: Bridges over Islands
Post by: roadman65 on February 02, 2021, 11:23:21 PM
I do not know how I missed that one.  I scrolled down very slowly.  Oh well, I removed it cause someone else mentioned it already.  I am sure if this thread goes on for several pages it will be mentioned again.

Drum Island in Charleston, SC has the Arthur Ravenel Bridge over it with no access to it.  Yet years ago the John P. Grace Bridge did the same, but dropped down to where it almost came close to being on it, but not far down enough.
Title: Re: Bridges over Islands
Post by: roadman65 on February 02, 2021, 11:26:26 PM
I thought there would be one somewhere along US-1 in the Florida Keys, but unless I've missed something, there isn't.

The old Seven Mile Bridge goes over Pigeon Key, but now is closed to vehicle traffic.  So no access to it by car anymore.

In that case it kind of makes sense that US 1 crosses all the islands at ground level, because it's the main route used to access the islands in addition to connecting them. You could possibly make a case for Missouri Key, but other than that they all have connecting roads.
Title: Re: Bridges over Islands
Post by: briantroutman on February 03, 2021, 12:01:58 AM
I-76/PA Turnpike crosses directly over Fourteen Mile Island in the Allegheny River northeast of Pittsburgh.
It also crosses Calver Island when crossing the Susquehanna River. 

I-81 crosses McCormick Island when crossing the Susquehanna as well.

If you want to include small and (at least to my knowledge) unnamed islands, the list could be quite long.

In the Harrisburg area—in addition to the examples mentioned above:
- I-81 (https://goo.gl/maps/c2YWLTAxPvcCNHnh8) crosses one other unnamed island in addition to McCormick
- The Harvey Taylor Bridge (https://goo.gl/maps/QiE5jUhHuTPVHRX29) crosses two unnamed islands
- PA 283 (https://goo.gl/maps/WoZp9c6tQpRfpurU6) crosses an island in Swatara Creek
- US 322 (https://goo.gl/maps/QXxejWzupSfbmYxn7) crosses an island in Swatara Creek

Other examples in Pennsylvania (larger and named islands):

- PA 372 (https://goo.gl/maps/bUGYGz7APKdYQ9Xa9) crosses Brushy and Piney Islands in the lower Susquehanna Valley
- US 202 (https://goo.gl/maps/eTsCXwbjPqctXiHV8) crosses Barbadoes Island near Norristown
- PA 378 (https://goo.gl/maps/Squ59ZdXKZbbrPeR7) crosses the otherwise developed Sand Island in Bethlehem without providing access
  (Nearby New Street also crosses without providing vehicular access but does have a staircase for pedestrians.)
- The Carey Ave Bridge (https://goo.gl/maps/8oidA5jzxePBFseV9) in Plymouth crosses Richard Island
- The 31st Street Bridge (https://goo.gl/maps/jCZJ3RghJPyF1NqK7) in Pittsburgh crosses Herr Island without providing access
Title: Re: Bridges over Islands
Post by: Bruce on February 03, 2021, 01:37:05 AM
The doomed West Seattle Bridge (high rise structure) passes over Harbor Island without providing access. To reach the island, you have to use the Spokane Street Bridge (aka the low bridge).
Title: Re: Bridges over Islands
Post by: webny99 on February 03, 2021, 01:01:53 PM
If you want to include small and (at least to my knowledge) unnamed islands, the list could be quite long.

In the Harrisburg area—in addition to the examples mentioned above:
...

Other examples in Pennsylvania (larger and named islands):
...

I must say, Pennsylvania and especially the Susquehanna River was custom-made for this thread. A lot of great examples have been posted, but two of yours are already my all-time favorites: This one (https://www.google.com/maps/@39.8175012,-76.3233551,3a,90y,302.5h,82.62t/data=!3m7!1e1!3m5!1sudN30OZi5EeNuVIpHyaogw!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DudN30OZi5EeNuVIpHyaogw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D278.71204%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656) (for its general uniqueness) and this one (https://www.google.com/maps/@40.4632915,-79.9764935,3a,41.6y,223.38h,88.84t/data=!3m6!1e1!3m4!1sTfrxKSj0ORPFTYxifwcYgA!2e0!7i16384!8i8192) (for the Pittsburgh skyline, although my Rochester skyline example in the OP is a close second).

It would be tough to come up with that many good examples for New York. The two border crossings and the Pont de Rennes were the only three I had thought of so far, and a fourth just occurred to me: NY 3 over the Salmon River in Pulaski (https://www.google.com/maps/@43.5686489,-76.1858628,17z/data=!5m1!1e1). I'm sure there are more, but they're not easy finds.
Title: Re: Bridges over Islands
Post by: webny99 on February 03, 2021, 01:10:07 PM
The doomed West Seattle Bridge (high rise structure) passes over Harbor Island without providing access. To reach the island, you have to use the Spokane Street Bridge (aka the low bridge).

That setup has quite a bit in common with the Burlington Bay Skyway (https://www.google.com/maps/@43.289003,-79.7899237,13.46z/data=!5m1!1e1), which connects Burlington and Hamilton, ON. They both have a surface route and a "skyway" route, and they're both in heavy shipping/industry areas, the main difference being that the Ontario example is two peninsulas split by a channel rather than an actual island. The surface route, Eastport Drive, also has a liftbridge (https://www.google.com/maps/@43.3001043,-79.7961463,3a,75y,170.1h,100.4t/data=!3m6!1e1!3m4!1s41UYpKqY98KhMU3yCyMaJA!2e0!7i16384!8i8192!5m1!1e1) to allow ships to pass through.
Title: Re: Bridges over Islands
Post by: Rothman on February 03, 2021, 05:54:21 PM
NY 5 crosses the Isle of the Cayugas between Schenectady and Scotia, NY.
Title: Re: Bridges over Islands
Post by: webny99 on February 03, 2021, 06:08:23 PM
NY 5 crosses the Isle of the Cayugas between Schenectady and Scotia, NY.

That's a good one, and I just found another along the Mohawk River: NY 167 over Moss Island (https://www.google.com/maps/@43.0396941,-74.8606676,3a,75y,83.26h,87.55t/data=!3m6!1e1!3m4!1sTjsUrN4qrh1xfjqW5_EQAA!2e0!7i13312!8i6656!5m1!1e1) in Little Falls. So we're up to six for NY now.
Title: Re: Bridges over Islands
Post by: vdeane on February 03, 2021, 09:03:17 PM
NY 5 crosses the Isle of the Cayugas between Schenectady and Scotia, NY.

That's a good one, and I just found another along the Mohawk River: NY 167 over Moss Island (https://www.google.com/maps/@43.0396941,-74.8606676,3a,75y,83.26h,87.55t/data=!3m6!1e1!3m4!1sTjsUrN4qrh1xfjqW5_EQAA!2e0!7i13312!8i6656!5m1!1e1) in Little Falls. So we're up to six for NY now.
Don't forget NY 7 over Adams Island and Starbuck Island when crossing the Hudson.

Speaking of Isle of the Cayugas... I've actually been on that island, from NY 5 no less.  One of the things they do for new employee training is have us shadow a bridge inspection.  While we were over the island, someone (either the person who operated the equipment or the safety spotter) needed to take a break, so they lowered us down to the island while that happened.
Title: Re: Bridges over Islands
Post by: ARMOURERERIC on February 03, 2021, 09:49:22 PM
31st Street Bridge Pittsburgh over Herrs Island
Title: Re: Bridges over Islands
Post by: webny99 on February 03, 2021, 10:48:11 PM
Don't forget NY 7 over Adams Island and Starbuck Island when crossing the Hudson.

Sure enough. It was dark both times I've been on that segment of NY 7, so I guess if I knew those islands were there, I'd forgotten.
Title: Re: Bridges over Islands
Post by: SteveG1988 on February 04, 2021, 07:00:43 PM
I-78 over the Schuylkill river in Hamburg crosses over an island.
Title: Re: Bridges over Islands
Post by: kphoger on February 04, 2021, 07:17:00 PM
Roosevelt Island east of Manhattan in New York City ... There is also a tramway ...

That was a great episode of White Collar.
Title: Re: Bridges over Islands
Post by: roadman65 on February 06, 2021, 10:46:53 PM
Roosevelt Island east of Manhattan in New York City ... There is also a tramway ...

That was a great episode of White Collar.

Sylvester Stallone was filmed in the tramway car stuck over the streets below in Nightsticks.
Title: Re: Bridges over Islands
Post by: jay8g on February 07, 2021, 02:40:30 AM
The SR 520 Bridge in Seattle passes over Foster Island (https://www.google.com/maps/@47.6457987,-122.290531,819m/data=!3m1!1e3?hl=en) without touching down -- the old route did briefly run on the surface here, but the new bridge is elevated the whole way (https://www.google.com/maps/@47.6449126,-122.2907741,3a,63.7y,33.12h,88.8t/data=!3m6!1e1!3m4!1sy7WtuevNBb9C5SwpMfDc2w!2e0!7i16384!8i8192?hl=en).

The US 197 bridge over the Columbia River (The Dalles Bridge) passes over several small islands (https://www.google.com/maps/@45.6098551,-121.1393552,1196m/data=!3m1!1e3?hl=en), which are probably related at least in part to The Dalles Dam just upstream.
Title: Re: Bridges over Islands
Post by: Roadrunner75 on February 08, 2021, 01:06:19 AM
Roosevelt Island east of Manhattan in New York City ... There is also a tramway ...

That was a great episode of White Collar.

Sylvester Stallone was filmed in the tramway car stuck over the streets below in Nightsticks.
Yes - I rode that tram with my son for the first time about a month ago out to Roosevelt Island and I was thinking about that scene in Nighthawks where Rutger Hauer holds people hostage on the tram.  Good movie...
Title: Re: Bridges over Islands
Post by: ErmineNotyours on February 11, 2021, 07:28:43 PM
Interstate 205 does touch down on Government Island, Oregon, but it has no legal access.  The state had to post signs on the ped/bike path saying Pedestrians, bicycles must stay on bike path. (https://goo.gl/maps/Lg5cQzn5r49RPsi67)  Can you imagine the outdoors-men dashing across freeway lanes with a fishing pole in their hands trying to get to the island?
Title: Re: Bridges over Islands
Post by: webny99 on February 12, 2021, 09:07:02 AM
Interstate 205 does touch down on Government Island, Oregon, but it has no legal access.  The state had to post signs on the ped/bike path saying Pedestrians, bicycles must stay on bike path. (https://goo.gl/maps/Lg5cQzn5r49RPsi67)  Can you imagine the outdoors-men dashing across freeway lanes with a fishing pole in their hands trying to get to the island?

That's a really unique situation. It looks like there are trails elsewhere on the island, but with no bike, foot or car access.. it must be accessed by boat only?
Title: Re: Bridges over Islands
Post by: Bruce on February 26, 2021, 05:15:08 PM
The Kurushima Kaikyō Bridge over Japan's Inland Sea has a toll booth on Umashima Island, but no connections for cars. It does, however, have connections to its bike path.
Title: Re: Bridges over Islands
Post by: MCRoads on February 26, 2021, 06:19:29 PM
The Kurushima Kaikyō Bridge over Japan's Inland Sea has a toll booth on Umashima Island, but no connections for cars. It does, however, have connections to its bike path.

That doesn’t appear to be a toll for automobiles, just for bikes/peds. It also appears there is a bus stop there, interesting...
Title: Re: Bridges over Islands
Post by: CtrlAltDel on February 28, 2021, 01:04:35 AM
Interstate 205 does touch down on Government Island, Oregon, but it has no legal access.  The state had to post signs on the ped/bike path saying Pedestrians, bicycles must stay on bike path. (https://goo.gl/maps/Lg5cQzn5r49RPsi67)  Can you imagine the outdoors-men dashing across freeway lanes with a fishing pole in their hands trying to get to the island?

That's a really unique situation. It looks like there are trails elsewhere on the island, but with no bike, foot or car access.. it must be accessed by boat only?

Yes.

(https://i.imgur.com/sj9VDIv.png) (https://stateparks.oregon.gov/index.cfm?do=park.profile&parkId=169)