1931 Echo Dam on Weber River near Coalville, UT

(Satellite)

Bureau of Reclamation posted three photos with the comment:

A closer look beneath the surface at Echo Dam:

What started as a routine day became a major discovery when a dam tender spotted unusual conditions earlier this year. After water levels were lowered, crews found large concrete slabs had been lifted and shifted by powerful flows from the spillway and outlet works into the stilling basin.

The Bureau of Reclamation and partners, including the Weber River Water Users Association, quickly investigated and determined the slabs were not fully anchored and had been displaced over time. Crews installed nearly 90 deep anchors, each about 30 feet long, to secure new concrete and improve long-term performance.

Repairs were completed ahead of schedule, helping ensure the dam remains safe, reliable and ready for future high-water events.

Rick Kuter: Let's hope the future includes some high-water events. Definitely not a problem with this winter's snowpack, or lack thereof.

Mike Kluth shared

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Evidently, the building is an outlet control works valve house rather than a powerhouse.

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Photo via StateParks

The spillway gates are on the far side.

Street View, Jul 2024

The spillway is on the far side in this view.

Street View, Sep 2024

usbr
"Echo Dam is a zoned earthfill structure, one mile upstream from the town of Echo and about six miles north of Coalville. It has a structural height of 158 feet [48m] and contains 1,540,000 cubic yards of materials. The spillway has a capacity of 15,000 cubic feet per second. The outlet conduit is a concrete-lined horseshoe tunnel to the gatehouse, from which two steel pipes pass through a tunnel to the valve house. The outlet works has a capacity of 2,100 cubic feet per second."

Hennepin Canal Lock #15

(Satellite)

Hennepin Canal Overview

Hennepin Canal State Park posted
Today's Throwback Thursday photo shows lock tenders and their families at Lock 15 (located between Wyanet and Tiskilwa)  in the early 1900s.

Jacek O, Oct 2021

1.2mw Trego Dam on Namekagon River near Trego, WI

(Satellite)

Saint Croix National Scenic Riverway posted

Xcel Energy will conduct a semi-annual test of the dam failure warning sirens below Trego Dam on the Namekagon River today, Monday April 6th, at 11:00 am.  The test will last about 90 seconds and involve a series of audible tones and messages. The test is in coordination with Washburn County Emergency Management, the National Park Service, and local townships.  Anyone with questions about this test should contact Xcel Energy’s 24-hour Customer Contact Center at 1-800-895-4999.

Image:  Trego Dam/NPS.  In the middle of the image to the right, water rushes over the concrete dam into a pool of bubbling water of the river creating white and rusty color foam.  The remaining concrete structure of the dam is in the background topped with green grass and trees.

George Scott: There are many smaller dams in Wisconsin that have been abandoned or are receiving minimum maintenance. A number of years ago a dam in DD Kennedy park on the Balsam Branch in Polk County partially collapsed causing a 6 foot crest to roll down stream into Lake Wapogasset and the Apple River. A few years before that another dam near Osceola collapsed causing the closing of Wisconsin 35 for about a year.

HydroRelicensing
The installed capacity is 1.2mw.

Cassie Baier posted
The dam in Trego Wi

stcroix360
Another alarm test notification

CSX/C&O and KY-644 Bridges over Levisa Fork of Big Sandy River near Walbridge, KY

1914 C&O: (Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; B&T; Satellite)

1883 Road:  (Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; B&T; Satellite)

1883 Tunnel: (B&T; Satellite)

Street View, Jul 2025

In 1914, C&O completed a new, longer bridge that did not need a tunnel and that reduced the curvature of the route. The road bridge and tunnel on this map were the original railroad route.

1953/55 Louisa Quad @ 24,000

Bridges & Tunnels by Sherman Cahal posted four photos with the comments:

Kentucky is a state with few 19th-century historic trusses remaining in its statewide bridge inventory, and the eastern half of the state has very few original roadway trusses remaining in general. That’s why it was surprising to come across fairly rare King Bridge Company trusses with Phoenix columns in Walbridge, Kentucky.

⤐ View the newest journal entry at Bridges & Tunnels at http://bridgestunnels.com/.../the-bridges-and-tunnels-of.../

⤐ c. 1883 bridge: http://bridgestunnels.com/location/walbridge-bridge/

⤐ c. 1883 tunnel: http://bridgestunnels.com/location/walbridge-tunnel/

⤐ c. 1914 bridge: http://bridgestunnels.com/loca.../walbridge-railroad-bridge/

Bridges & Tunnels by Sherman Cahal shared with the comment: "A former railroad alignment south of Louisa, Kentucky, has been reused for a state and county road."

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As expected, the original railroad bridge is pin connected.

B&T

North Bottom Road (603rd Lane) over Rock Creek north of Quincy, IL

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

Street View, May 2024

It is not pin connected.

Street View, Aug 2019

Street View, Jun 2012

Justin Fogerty posted eight photos with no comment.

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1975 Grand Teton Dam Collapse

Dam Remnants: (Satellite)

Spillway: (Satellite)

Discover's Engineering Catastrophes, S6, EP13

The dam was 305' (93m) high.

19:22 video @ 12:34
The Wild Story of the Teton Dam Failure
The Bureau of Reclamation decided to fill the reservoir even though construction of the primary outlet works would not be done for another year. They did have a secondary outlet works available, but it was not enough to keep the fill rate under a foot (30cm) a day. (But, "after a particularly snow winter," it filled at 2 feet a day.) The dam was built on porous rock and the wind-deposited silt (loess) they used in the cutoff trench supported piping. That is, the water was able to erode a pipe through the trench.

The dam collapsed on Jue 5, 1976, during its first filling. So this year (2026) is the 50th anniversary of the collapse. That explains why I saw several videos about the collapse. The above video makes the following videos rather redundant, but I could not bring myself to delete them.

@ 12:59

Facebook Reel

Facebook Reel

This is the beginning of a sequence of stills that show how this little gurgle quickly grew into a massive breach.

12:30 video @ 2:15
The 1976 Collapse of the Teton Dam, Idaho: Investigating the Geologic Evidence

1914,2010 Airtight Bridge over Embarras River and World's Largest Statue of Abe Lincoln near Charleston, IL

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

Statue: (Satellite)

Lisa Ruble posted

Airtight Bridge over the Embarras River is one of Coles County’s best kept secrets. Located along Airtight Road, it is the only direct route between the village of Ashmore and the unincorporated towns of Bushton and Rardin. The location is isolated, and most people do not come upon it by accident.

Locals say the bridge earned the name “Airtight” because of the unnatural stillness encountered while crossing it. Designed by Claude L. James, Airtight Bridge was built in 1914 by the Decatur Bridge Company. Thanks to its remote location, it became known as a drinking spot for local teens and students from Eastern Illinois University. Otherwise, the bridge, described as “old” and “creaky,” had a pretty mundane existence. In 1981, Airtight Bridge was added to the National Register of Historic Places.

On October 19th 1980, the nude body of a woman floating near the bank of the Embarras River a few yards downstream from Airtight Bridge was discovered by two brothers from Urbana, who were deer hunting, and a local farmer. Because the body was missing its head, hands, and feet, the murder investigation became known as the “Airtight torso case.” In 1992, the body was identified through DNA as that of 26 year old Diana Marie Small of Bradley (Kankakee County Illinois). On March 1st 2017 Diana's husband, 70 year old Thomas Small, who still lived in Bradley, was arrested for her murder. After two days of talks he confessed to Diana's murder. Eight months later he pleaded guilty to first degree murder and was sentenced to 30 years in prison.

Obviouisly, it is pin connected.

Patty Goatley, Oct 2024

The river was a lot higher in this photo.

Historic Bridges
"This is an unaltered traditional Pratt through truss bridge in a tranquil rural setting."

The world's largest statue of Abe Lincoln.

Mattox Pugh, Jul 2025