Wednesday, February 21, 2024

Lost/NP Saint Louis Bay Bridge over St. Louis River at Duluth+Superior

(Bridge Hunter broke Mar 22, 2023; John A Weeks III; Satellite, south abutment)

[The NP bridge is in the middle by the grain elevator. The bridge behind that one was the Interstate Bridge.]

The grain elevator in the background is the 1898 General Mills/Great Northern Grain Elevator "S" and "X".
David Schauer posted
Amtrak's Northstar with a late morning arrival to the Twin Ports is seen crossing BN's Wisconsin Draw with the Great Northern elevator as an impressive backdrop. Superior, WI - early 1983
Steve Anderson: They blew that bridge up in 1984. I saw it on WDIO News.
Bradley Massengill: In superior / duluth, the passenger main line was pulled out along with Wisconsin and Minnesota drawbridges, so a ten minute crossing now takes an hour via grassy point drawbridge,
[So the southern swing bridge is called the Wisconsin Draw, and the northern swing bridge is called the Minnesota draw.]

According to John Weeks, the Interstate Bridge was built by GN and this bridge was built by NP.
1953 Duluth and 1954 Superior Quad @ 24,000

"This photo was clipped from the program for the dedication ceremony for the new I-535 Blatnik Bridge over the harbor connecting Duluth (on the near side) to Superior (on the far side). The Great Northern Interstate Bridge is located just to the left of the Blatnik Bridge. The Northern Pacific Saint Louis Bay Bridge is located on the right side of the photo. The Minnesota Draw swingspan is located in the foreground, while the Wisconsin Draw swingspan is located at the far right edge of the photograph."

Tuesday, February 20, 2024

1951 Wards Island/103rd Pedestrian Bridge over Harlem River in New York, NY

(Bridge Hunter broke Mar 22, 2023; no Historic Bridges; Satellite)

How many pedestrian bridges in the USA, world, have a working lift span?

Street View, Oct 2016

The lift span is 312' (95m) long, and the sidewalk is 12' (3.7m) wide.

Metrotrails posted
Wards Island Pedestrian Bridge, originally known as Harlem River Pedestrian Bridge, completed in 1951. It connects the east River Greenway to Wards Island and Randall's Island Parks.
The center section is a lift span that allows for the passage of larger ships.
Seen from the walkway on Manhattan.
M'ke Helbing shared

The New York Landmarks Conservancy posted
Wards Island Bridge
The Wards Island Bridge, also known as the 103rd Street Footbridge, is a pedestrian bridge crossing the Harlem River between Manhattan Island and Wards Island. Completed at a cost of $2.1 million, it opened to pedestrians in 1951 and was later opened to bicycles in 1967.
The vertical lift bridge has a total of twelve spans consisting of steel towers and girders. Although originally painted in a red, yellow, and blue color scheme, it was repainted in sapphire blue and emerald green in 1986. After being closed to the public for approximately two years for a $16.8 million infrastructure project, Wards Island Bridge was reopened on June 1, 2012 and is open 24 hours-a-day year-round. Previously, the bridge had only been available for use from April through October during daylight hours.
Dave Frieder: Bridge was originally owned by the TBTA. Now owned by NYCDOT.
Engineer of design, Othmar Ammann. SAME engineer who was responsible for the engineering of the GWB [I presume the George Washington Bridge.]!

"The Wards Island Bridge is a pedestrian bridge over the Harlem River connecting the East River Housing Project at East 103rd Street in Manhattan to Wards Island. The view from Wards Island."

webpage with 9 photos

The navigation channel has a closed clearance of 55' (17m) and a width of 300' (91m). [WaterwayGuide]

This is one of the 2027 bridges in NYC. [nycbridges]

Monday, February 19, 2024

Historic Chicago Maps

These notes are dynamic in that I add maps as I find them. I try to add them in chronological order.

Michele Ann posted

Terry Gregory posted
On February 11, 1835, the Town of Chicago was Incorporated when the corporate limits were extended, so as to include all land lying east of State Street to the lake shore, from Chicago Avenue  and Twelfth Street. Previously the boundaries did not include the military reservation.
This  1834 survey drawn by J. S. Wright reflects the expansion.
Side note: Feb 11 is my birthday.

Bruce E. Jones commented on Terry's post
Very cool, lines up well with the 1833 map. I like the detail on the 1834 survey.

Terry commented on Bruce's comment
This map was designed by Walter Conley and drawn by O. E. Selzer for the 1933 Century of Progress Exposition. It was created after a two year search of libraries and archives and Miss Caroline McIlvane aided in the compilation when she provided details from the last surviving pioneers in 1900. The sketches were added to provide authenticity to the research. The map was published in the Chicago Tribune, August 13, 1933.

Jack Martillo posted

Daniel Bovino posted
Here’s a late 1880’s view of Roseland, Pullman, and the Calumet region. It shows a Lake Calumet in its original state and other lakes that have since been filled in. Hyde Lake is almost completely gone. Wolf Lake and Lake George have also been altered by the industrial push into this region over the last 150 years. Thankfully, some of our remaining area wetlands are under restoration. 
I received this wonderful map from Mendel Alumni, John Ormsby.
John Ormsby: Map taken from Library of Congress. Map Room in Jefferson Building
Paul Jevert shared
1880's topographical map of the southside at that time unincorporated into the City!

Jeff Nichols posted four pictures with the comment "1892 bird's eye map of Chicago. LOC."

Jack Martillo posted

Rachel Frundt posted

Sunday, February 18, 2024

1957 Wuhan, 1995 Second Wuhan and 2011 Erqi Yangtze River Bridges in China

Erqi: (Satellite)
Wuhan: (Satellite, 1,595 photos)
Second Wuhan: (Satellite)

(First) Wuhan Bridge:
Y Hu, Jul 2019
When completed in 1957, this was the easternmost bridge on the Yangtze River. It is 1.6km (1mile) long with an upper deck for traffic and a lower deck for the Beijing-Guangzhou railway line.
There is a full-time maintenance team for the bridge. "Since opening, the designated speed of trains crossing the bridge has increased from 35 to 300 kilometers per hour, and the travel time from Wuhan to Guangzhou, Guangdong province, has been reduced from 44 hours to less than four."

I've heard that China has issues with air pollution, but I didn't realize how bad it was until I started looking at photos of these bridges. Is this pollution or fog obscuring the bridges?
"The Wuhan Yangtze River Bridge was the very first bridge built on the river."

The Second Wuhan Bridge is in the foreground, and the Eriqi Bridge is in the left background.
全球全景, Mar 2019

Highway Engineering Discoveries posted

The Second Wuhan Bridge was completed in 1995. It is a " Cable-stayed bridge with semi-fan system" with 392 cables. The length of the main bridge is 1,877m (1.2mile). [ [strucurae]

Yu, M. & Guo, Hang & Chengwu, Zou. (2006). Application of Wavelet Analysis to GPS Deformation Monitoring. 670 - 676. 10.1109/PLANS.2006.1650660. 

It has a central span of 400m (1312') and "bridgeheads" that are 90m (295') high. They give a figure of 392 cables. I think that is per bridgehead (tower). [hubei]

More fog or pollution?
LFI Gallery, cropped
It was completed in 2011. "The total length of the line is 6507 meters [4 miles], and the main bridge is 1732 meters [1 mile]."

"The 616m [0.4 mile, 2021'] long mid span ranking the bridge as the world's largest cable-stayed span with three towers, but also the longest span cable-stayed bridge with composite girder." [fidic_award]


Steve Chen via pexels, License: Creative Commons Attribution (CC BY)

It looks like salties can come all the way up the river to here. Part of the Second Wuhan Bridge is in the background.
Digitally zoomed to photo resolution

A Flickr photo that has a good view of the towers and of lots of ships.

I don't think fog would be orange. Are their steel mills in this town?
 全球全景_left, Mar 2022, Erqi Bridge

 全球全景_right, Mar 2022, Secon Wuhan Bridge

Saturday, February 17, 2024

1889+1892+1910,2005 Monroe Street Bridges and Lower Falls Dam in Spokane, WA

Bridge: (Bridge Hunter broke Mar 22, 2023; Historic Bridges3D Satellite, 532 photos) 
Falls: (3D Satellite, 313 photos)

Trail View, Oct 2015

Trail View, Oct 2015

Bridges Now and Then posted
"The second Monroe Street Bridge (Spokane, Washington) was a steel structure built 1892. It is pictured here after a 100-foot section collapsed in 1910 during the construction of our current concrete version. A city engineer at the time said a cyclonic wind caused the collapse, but it was never determined whether wind, added weight of steel reinforcement or an earth slide was the actual cause." (Spokesman-Review)
[DiscoveryRobot has a photo of the second bridge. It is much spindlier than the truss we see here. HistoryLink states: "on July 21, 1910, a severe windstorm destroyed the temporary wooden falsework, adding cost and delay." But this photo doesn't look like falsework. So I'm confused.]

"The second bridge developed a vibration and eventually collapsed after a mud slide on its south side. In 1907 when the Ringling Brothers Circus came to town, the elephants refused to cross the bridge apparently sensing something was wrong." [DiscoveryRobots]

"In 1909 Spokane City Engineer John Chester Ralston completed the design and specifications for the replacement bridge. The new bridge was a 281-foot [86m] monolithic concrete span with main piers met by graceful arches at either end. Its continued location at Monroe Street required crossing a gorge 140 feet [43m] deep and 1,500 [457m] wide, no easy task." [HistoryLink]
Construction Photo via HistoricBridges, Source: Washington State Archives
"Historically, this bridge was also significant for very briefly holding the record for largest concrete arch span in the United States."
Photo via HistoricBridges, Source: Washington State Archives
[Union Pacific built their bridge across the street bridge. "Not until 1973, in preparation for Spokane’s environmental world’s fair, Expo ’74, was it removed." [HistoryLink]]

In 2005, when they rebuilt the bridge that was above the arches and piers, they accurately reproduced the buffalo skulls on the wagon-shaped lookout pavilions. [HistoricBridges, HistoryLink has some details about the ornamentation.]
Street View, Jul 2017

The trail view near the top of these notes caught a low river flow.
 Cynthia ReaLynch (Cindy Rea), Jun 2022
2:06 video @ 0.00

Cynthia ReaLynch (Cindy Rea), Jun 2022
2:06 video @ 1:58

Another heavy flow in June.
Anitha Kapu, Jun 2023

2022 was a wet year.
Neelam Choudhary, May 2022

Another heavy flow. This one was in 2018.
The first bridge was opened in 1889 and carried early electric street cars. It was a wooden bridge, and it burned a year later.

In fact, the trail view must have caught one of the lowest flows of the river.
Street View, Sep 2018

This is a Francis turbine. "Washington Water Power built its first hydroelectric generating facility on Monroe Street in 1890 and has been producing power from this location ever since. Located at the heart of downtown Spokane, the dam was instrumental in providing electric lighting for Spokane’s streets and businesses as opposed to lighting via candles and oil lamps. The dam was rebuilt just before the 1974 World’s Fair, and a new underground powerhouse was added in 1992, replacing the vintage 1900-era turbines and generators with a modern generating unit that produced twice the electrical power using the same amount of water flow. WWP also donated 5 acres for expos that later became part of the Spokane Riverfront development." [SpokaneHistorical]
MaDi, Aug 2021, cropped

Friday, February 16, 2024

Milwaukee Pontoon Bridge over Mississippi River at Reads Landing, MN

(Bridge Hunter broke Mar 22, 2023; Satellite)

Ted Hazelton posted four images with the comment: "I found some photos of the Milwaukee Road Railroad's pontoon bridge crossing the Mississippi River in Reeds Landing, Minnesota. This is a couple miles north of Wabasha. The bridge was destroyed by flood waters in 1952."
Ted Hazelton shared
Ted Hazelton shared
Ted Hazelton shared




Tobias Caldicott commented on Ted's share