Wednesday, December 31, 2025

World's Largest Wildlife Overpass over I-25 near Larkspur, CO

(Satellite, it has yet to appear on the satellite image. "near the Greenland Interchange between Larkspur and Monument." [codot])

98.5 KYGO posted
The project covers six lanes of I-25 and creates 39,000 acres of land together. The overpass is 204 feet [64m] wide and was $15 million.
https://kygo.com/look-worlds-largest-wildlife-crossing-bridge-on-i-25-south-of-denver-is-complete/
John Mittelstedt: They built it so when housing projects are built on both sides, they'll convert it to an overpass.
Mary Froehle Pucci: John Mittelstedt ummmm incorrect. It’s a conservation preserve that was paid for by John Malone and Ian Griffis. Malone owns the second highest amount of land in the USA.
Scott Lee Harbin: John Mittelstedt can't build on that, has a permanent easement as an open space.
Janei Folz: Not just for wildlife. Now the ranchers can herd their cattle from grazing fields and not have to truck them across I 25.
[There were a lot of comments about who is going to train the animals to find it and even more replies that these crossings have been proven to work in other areas. They start by choosing a natural migration path, and then they put fences along the road to funnel them to the crossing. It is probably easy finding the migration paths by noting where the roadkill is high.]

"The structure is being built for big game animals such as elk, mule deer and pronghorn. The overpass will be strategically located to address the 3.7 mile gap from other wildlife crossings and will complete the wildlife crossing system of underpasses and fencing as a part of the I-25 South Gap project - which improved 18 miles of Interstate 25 from Castle Rock to Monument....The overpass is a critical component of the overall wildlife crossing system that is expected to reduce wildlife-vehicle crashes along this stretch of I-25 by 90%. Prior to the system being built, there was an average of one wildlife-vehicle crash a day in this corridor. While the new underpasses are used by smaller animals, the overpass addresses specific needs for large game animals such as elk. They are known to avoid tunnels and enclosed structures that can’t accommodate their antlers and restrict mobility. They prefer open structures with clear sight lines....This project is one of 19 wildlife crossings in the U.S. Department of Transportation funded nationwide." [codot]

FOX31 KDVR.com posted
The Colorado Department of Transportation has completed construction on a wildlife overpass crossing Interstate-25 near Larkspur. 
(Photo: Courtesy CDOT)

kdvr
"The wildlife overpass, which is covered with dirt and vegetation, was completed in less than a year — both ahead of schedule and on budget, according to CDOT. A federal grant provided “the bulk” of the funding for the project."

Tuesday, December 30, 2025

1911 White Rock Dam on White Rock Creek in Dallas, TX

(Satellite)

Like many dams in Texas and Oklahoma, this dam was built for a water supply.

When I looked at photos of the spillway, I was confused because it looked like there were two different spillways. These aerial photos show that there are two different spillways --- a one at the edge of the lake and another one downstream before Garland Road.
[I lost the credit.]

[I lost the credit.]

Historic Texas USA posted
Spillway Under Construction at White Rock Lake, Dallas (1911)
[The description continues with some platitudes.]
DallasASACE
When Lake Lewisville was built in 1930, the land around this lake was transferred to the parks department. A swimming beach was built. Because of a severe drought, the lake was transferred back to the water department in 1952 and swimming was outlawed. The pump station remained in use until 1964.
The lake was dredged in 1937, 55, 74 and 98. They are in the midst of a feasibility study (accessed Dec 2025) to determine if it should be dredged again.

The "earth-fill structure [is] approximately 2,100 feet [640m] in length and 40 feet [12m] in height." The spillway is 450' (45.7m) wide. [twdb]

This photo catches the upper spillway passing water. I wonder what the workers are doing in the middle of the photo.
Youssef Almkari, Jul 2021

The lower spillway passing water. 
matt karmil, May 2021

Were the workers in the upper-spillway photo above adding these two outlets?
Chad Meis, Jun 2025

A strong flow over the upper spillway.
Marcus Tovar, Apr 2021 [I lost the link]

And a view of the upper spillway from the parking lot.
Poovalagan Jagadeeswaran, Apr 2024

Another view of the lower spillway. Part of the upper spillway is in the right background.
 Paul Samrane, Mar 2019

The earth-filled part of the dam taken from the edge of the upper spillway. The smokestack is part of the pump house that is at the end of the dam.
Joan J, May 2025

Michael Kleiman, May 2025

3:17 video
History of White Rock Lake | Dallas, TX

Monday, December 29, 2025

2026 Leon Hurse Dam and Lake Ralph Hall near Ladonia, TX

(Satellite, the dam is still being built.)

Heavy Lift Productions post
Future lake under way in Texas
Frank Etier: Good looking pump station in the back ground.

Cody Emma Curtis commented on the above post
That's my job i run the Kobelco 1600

I wonder how many fossils are in the Fossil Park and how do they relocate them? I don't think you can use an excavator and dump trucks because you would bust a bunch of fossils.
LakeRalphHall

It looks like some strip mined land is being covered up. That is no loss.
It turns out, they are not moving fossils. They are just letting people dig in a different fossil bed. [LakeRalphHall_fossil]
Satellite

LakeRalphHall_reservoir
The dam will be approximately 2.3 miles (3.7km).

LakeRalphHall_reservoir
The pumping station will initially move 45m gallons per day, and eventually it will do 80mgd.

Sunday, December 28, 2025

1892 Road/N&W Dingess Tunnel at Ghost Town Dingess, WV

North Portal: (Satellite)


North Portal:
Street View, Jul 2023

South Portal:
Street View, Jul 2023

No kidding about yielding to traffic that is already in the tunnel. I guess, since the tunnel is straight, you can see if a vehicle is already coming to you. I'd be sure to turn on my headlights even though the tunnel is well lit so others could see that I'm in the tunnel. In fact, when I checked out the sign on the left, it reads "CHECK HEADLIGHTS."
Street View, Jul 2023

Rebecca Campbell, Oct 2023

Stones Austine posted
The Dingess Tunnel in Mingo County as it was being constructed.
Joe Daugherty: STONE MASONS FROM ITALY , REAL STONE CUTTING , maul haul bone masons

1894,1907 CNYK/NS/Erie Bridge over Lackawaxen River in Lackawaxen, PA

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

CNYK = Central New York

Street View, Aug 2024

HistoricBridges
The 591' (180m) long bridge has a main span of 132.6' (40.4m).
"This bridge is a great example of how railroads would alter bridges (both long ago and more recently) to accommodate increasing loads and increased deterioration. First, the original 1894 bridge was altered in 1907. This is discussed in the HAER documentation. More recently additional alterations and repairs have been made, and are easy to spot on the bridge as they have a brighter orange rust color in the photos."

Dave Schnitzler shared three photos with the comment: "If folks out there have any photos of the EL in and around the Masthope/Lackawaxen, PA environs it would be greatly appreciated if you could post a few.  My recollection is that many of the trains going by the cabin in Masthope were toting piggyback trailers on flatcars.  Here are a few recent pix of the bridge crossing the Lackawaxen river just adjacent to the Delaware."
1

2

3

I found only the third photo on HAER.
HistoricBridges

Saturday, December 27, 2025

1945 50mw Alder Dam on Nisqually River near Eatonville, WA

(Satellite)

Note that the spillway is off to the side in the background of this photo.
K Grimm, Sep 2023

Dec 2025 Flood:
Facebook Reel

Google search results [I could not find a link to the page that sourced this photo.]

The dam is 285' (87m) above the riverbed and 330' (101m) above bedrock. It is 1,600' (488m) long. It has two 25mw generators. [mytpu]

EatonvilleToRainier
Construction in 1944.

Russ Kurkov, Jul 2021

The dam does have an outlet works.
angel kaiz, Jun 2019

1939 75mw Claytor Dam on New River near Radford, VA

(Satellite)

Jamie Henley, Apr 2020

Facebook Reel

ClaytorHydro

ClaytorHydro_about
"Construction of the left abutment of Claytor Dam, 1938. Dam workers are standing on the future spillway basin.  Note the extensive form work which would have required gifted carpentry skills.  Imprints of the wooden forms remain today."
"All four turbines are of the Francis type rated at 26,000 horsepower and directly connected to four AC generators rated at 18,750 kW. The total installed capacity of the Project is 75MW. The total hydraulic capacity of the Project turbines is 10,000 cfs."

ClaytorHydro_about