1914 Välkommen (Old Mill) Bridge over Smoky Hill River in Lindsborg, KS

(Archived Bridge Hunter; Bridge Hunter; Historic Bridges; Satellite)

I discovered this bridge while looking for the Old Mill Museum.

Street View, Mar 2014

Note the 2014 date on the street view above. It is now closed to vehicle traffic.

HistoricBridges, 2017 photo by Robert Elder
This 257' (78m) long bridge has a main span of 120' (36.6m).

Photo by Robert Elder via BridgeHunter

It is not pin connected. The 1989 rehabilitation kept the original railings. 

Street View, Mar 2014

1899 BPRR/B&O/BR&P Trestle over Little Mahoning Creek near Goodville near Dayton, PA

(Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; HAER; Satellite)

BPRR/BR&P over Mahoning Creek: (Satellite)

I added "near Dayton, PA" because all of the Goodvilles that I could find on modern maps did not include this one. The BR&P Goodville has disappeared.

BPRR/BR&P = Buffalo & Pittsburgh/Buffalo, Rochester & Pittsburgh

The bridge is 1000' (305m) long with a main span of 120' (36.6m). [BridgeHunter]

The Buffalo Rochester and Pittsburgh Railway Company posted
The Flyer crossing Little Mahoning Creek at Goodville Pa circa 1900. The locomotive appears to be one of the beautiful ten wheelers.

Dennis DeBruler commented on the above post

Location: https://maps.app.goo.gl/174jv1rJfiDb9AYc9

Photo: https://www.loc.gov/resource/hhh.pa2771.photos/?sp=4&st=image

The railroad crossed the Mahoning Creek a little east of this crossing.

1909/09 Smicksburg Quad @ 62,500

You can see that the bridge over the Little Mahoning Creek still has its towers.

Satellite

The bridge to the east has concrete piers. The trees block getting a decent street view.

Satellite

This is on the route between the B&O mainline and DuBois.

Rumsey via Dennis DeBruler

1950,2015 Abram Piatt Andrew and 1907,1981 Blynman Canal Bridges in Gloucester, MA

Andrew: (Archived Bridge Hunter; Bridge Hunter is broken; no Historic Bridges; Satellite)

Blynman: (Archived Bridge Hunter; Bridge Hunter is broken; no Historic Bridges; Satellite)

Abram Piatt Andrew Bridge

Jonathan Ross, Sep 2025

Bigtom Brancaleone posted two photos.

Gil B Guerin: The A. Piatt Andrew.

1

2

This 862' (263m) long bridge has a main span of 420' (128m). [ArchviedBridgeHunter_Andrew]

It had a much-needed rehabilitation in 2015. 

5:30 video @ 1:14 via Archived Cianbro
The repairs were done while traffic continued to use the bridge. They replaced one brace at a time by installing a temporary brace, demoing the old brace, installing the new brace and then moving the temporary brace to the next position to be replaced.

Blynman Canal Bridge

I found this bridge while looking for the arch bridge. It is interesting that they used two short leaves rather than one more normal length leaf.

The length of the bridge is 90' (27m). [ArchivedBridgeHunter_Blynman]

2013 photo by C Hanchey via ArchivedBridgeHunter_Blynman, License: Creative Commons Attribution-NonCommercial (CC BY-NC)

1951 37mw Lake Whitney Dam on Brazos River near Whitney, TX

(Satellite)

USACE, Fort Worth District posted
#OTD [Dec 10] in 1951 deliberate impoundment began at Whitney Lake. The main dam and spillway were completed eight months earlier in April.

W Boz, Aug 2021

USACE_recreation

As with many dams in Texas and Oklahoma, water supply is one of the purposes of this dam. It has two 15mw generating units. [tshaonline]

It was funded for flood control and power generation. But after the drought in the 1950s, water conservation was added to its function.

The 17,694' (5.4km) long dam is an earth embankment with a large concrete spillway. The spillway crest "(top of ultimate power pool)" is at 533'. 533' is also the conservation pool level. The flood pool is at 571', and the maximum design level is two feet higher. "The tops of the dam are at elevation of 584.0 feet and 580.0 feet above mean sea level for the concrete dam and the earth embankment, respectively." [twdb]

I've never seen a "top of ultimate power pool" specification before. Normally one sees a power pool elevation that is significantly below the conservation level. They have to quit generating power if the elevation drops below that because the head is too small for the turbines to function properly. In this case, it seems the turbines have to shut down if the head becomes too large.

I could not find a capacity figure for the spillway.

"All that water is held back by what is described as a rolled earth, concrete and steel structure that totals 17,695 feet long, 1,674 feet [510m] of that being the concrete structure, is 166-feet [51m]-tall and at the top is 34-feet 7.3m]-wide. But at the base, Beasley said, the concrete, reinforced by huge steel rebar, is 735-feet [224m]-thick." Each Kaplan turbine is supplied water by a 16' (5m) diameter penstock. "The [2017] upgrade resulted in an increase of from 20,700 kW to 37,000 kW in each generator at a 6-percent reduction in production cost....Except for internal parts like brushes and ball bearings, every piece of both Allis-Chalmers turbine and generator systems is exactly what was installed originally." [kwtx]

Note that this graph is water storage, not elevation. We can see the "bumps" caused by the heavy rains Texas had in the Summer of 2025.

WaterDataForTexas

I did find an elevation graph. It easily handled the rains of 2025 since the flood pool is 571'.

WaterData

WacoHistory
The dam provides flood control for Waco.

Fort Worth District, U.S. Army Corps of Engineers posted

One issue with flood control dams is to control development along the conservation pool for recreation. It is important that all such development be designed to withstand flooding. Because the main purpose of the dam is to flood those areas during heavy rains. The development is typically things like boat ramps, park benches, pavilions, etc. that can easily be power washed and returned to use after a flood. And campgrounds so that people can move out of the area during heavy rains.

This was the master plan for use of land between the conservation and flood pools.

USACE_public_meeting

This is the new master plan released in 2017.

USACE_final_report

1925 111mw Lower Baker Dam

(Satellite)

king5
Puget Sound Energy spent $170m to save the fish. That translates to the customers paying an extra dollar each month.

It looks like the gates are sluice gates.

vertical-access
"Completed in 1925, Lower Baker Dam is a concrete gravity-arch dam at the south end of Lake Shannon. The dam is 285 feet [87m] high and measures 550 feet [168m] across at the crest. Twenty-three spill gates run across the top of the dam, with non-overflow sections to the east and west of the spillway section."

pse
The powerhouses have a generating capacity of 111mw.

goskagit
Sirens are tested once a month in case people in Concrete, WA, need to evacuate the valley because of a dam emergency.

Facebook Reel

USACE

BNSF has stopped service on some of its subdivisions and a huge log jam had to be cleared at the US-2 bridge at Ebey Island.

1906 BNSF/Great Northern Bridge over Skagit River at Mt. Vernon, WA

(Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; Satellite)

The Skagit River has suffered record flooding in Dec 2025. I've seen videos of a temporary flood wall that Mt. Vernon installed along the river next to their downtown.

safe_image for Heavy Rainfall Causes BNSF Subdivision Closures in Washington (Updated 12/17) [paycount of 2, see the map below instead.]

Daniel Curtis, May 2016

The sandbar and grass on the north side of the river is under water.

Satellite

It looks like even the road is way under the water.

Street View, Sep 2021

rtands

Photo by Rich Murphy via ArchivedBridgeHunter, License: Creative Commons Attribution-NonCommercial (CC BY-NC)
The swing span has been fixed since 1965.

India's Tunnels under the Himalayan Mountains

I was aware of long tunnels under the Alps, but I was not aware that India is building so many long tunnels under the Himalayans. Unfortunately, the Himalayan Mountains have serious faults that make tunneling dangerous.

The B1M posted four images with the comment:

Digging deep. India is building its longest ever tunnel in one of the world’s most dangerous locations 😮

https://www.youtube.com/watch?v=CI7qaAP3huo

1

2

3

4

This video describes some of the tunneling efforts including the collapse of the Silkkyara Tunnel and the subsequent rescue of 41 people. Four rescue methods were launched in parallel. The auger method one.

13:40 video @ 4:14

The 9km Atal Tunnel has been completed.

@ 8:59

The 13km long Zojila Tunnel is currently being built. For it, they are using a new construction technique called the "New Austrian tunnelling Method." First of all, ground stability is monitored continuously. The construction uses rock bolts, steel ribs and shotcrete. Then they add a waterproof lining and another layer of concrete. This technique was used for the Silkkyara Tunnel, but they evidently did not properly adjust their approach as and when problems occurred.

@ 10:28

Milwaukee Amphitheatre Tunnel was Daylighted

(Satellite)

Milwaukee map location

Kenn Milewski posted
https://youtu.be/o1SOgXjZtqs?si=VGwjC5smqDKIpD1g

Michael Sol: The "ground" in that particular portion of the Milwaukee Road's long branch-line to Great Falls and Agawam was "shifty." Tunnels did not stabilize that ground, and it was finally easier to just "daylight" the tunnels, or, at a minimum, remove the overburden so that it no longer would push the tunnels around. Problem solved!

[It looks like the problem was not solved because the cut had a landslide and covered where the track would have been.]

I tried watching the video Kenn links to, but the narrator kept saying the land was scenic. I gave up at 2:23 because of too much scenery talk and because it looked like it was going to be a "come explore with me" video.

1886 Collapsed/Trail/Railroad Spey Viaduct at Garmouth, UK

(Historic Bridges; Satellite)

 

0:58 drone video in BBC
"The bridge spans 350ft (107m) over the River Spey, regarded as the fastest flowing river in Scotland."
[One of the two columns in the pier has disappeared. It looks like the trusses themselves have remained intact.]

Facebook Reel
[The URL is a paywall.]

UrbanRealm
"The sudden collapse of a 140 year old viaduct in Moray has been attributed to scour action by engineers conducting an emergency inspection."
"Moray Council engineers have now assessed the Garmouth Viaduct and on initial inspection can confirm the collapse appears to be due to scour. At the time of the last scour report, by a specialist contractor in 2023, there was no evidence of scour. It appears that over the last year the river flow path has changed, which may have contributed to a change of impact on the piers."
"The River Spey is known for its shifting flows, moving from below the main span arch before the 19th century bridge was completed."

One can see the landscars of a lot of river meandering, including a rather recent one in terms of geological time.

Satellite

Street View, Nov 2025

Pawel A, Nov 2023

 Robert Forsythe added
The great viaduct on the former GNoSR route across the Spey at Garmouth. Today has come the news that the end spans have been very severely damaged. This was our visit in 1996.
 Mark Watson shared
A cycle route across the mouth of the Spey is now closed. The wrought iron trusses, built in 1883-1886, are on iron caissons filled with concrete were sunk to bedrock at between 25 and 75 feet depths, (ref Paxton and Shipway, both now dead, Civil Engineering Heritage- Scotland, Highlands and Islands, 2007)

Jenn Blunstone, Oct 2024

HistoricBridges
This 950' (290m) long bridge has a main span of 350' (107m) and six approach spans.
"This bridge is noted for its amazing 350 foot clear span, which while not record-breaking, was nevertheless a notable achievement for a clear-span truss at this period in history. The impressive appearance of this bridge is enhanced by its heavy truss members, which are contrasted by the graceful curve of the bowstring design."
"Structure Type: Metal Rivet-Connected Bowstring Through Truss, Fixed and Approach Spans: Metal Rivet-Connected Howe Pony Truss"

safe_image for SPEY VIADUCT: A LOOK INTO ITS HISTORY AFTER THE RECENT COLLAPSE

Facebook Video