Friday, October 4, 2024

UP/SP/SSW(Cotton Belt) Rob Roy Swing and Lift Bridge over Arkansas River near Pine Bluff, AR

(Archived Bridge Hunter; no Historic Bridges; Satellite)

Photo by David Miles via BridgeHunter
New vertical lift span

Photo by David Miles via BridgeHunter
Old swing span

Photo by Fredrick Garcia via BridgeHunter

Redeker Rail Video & Photography almost caught the Big Boy on this bridge and posted this photo.
Dennis DeBruler: This makes it very evident that this bridge has both swing and lift spans.
[By almost, he explains that traffic was so heavy that he was about 5 minutes away from his desired launch point. So he launched from a distance. This is a nice complement to the usual bridge photos. I could tell right away that it had both a lift and a swing span. That is unusual because normally the navigation channel is narrow enough that they have to replace the swing span. The only other ones that I have seen that have both types of movable spans is a railroad bridge over the Atchafalaya River in Morgan City, LA and a railroad bridge over the Columbia River near Kennewick, WA.]

Big Boy put this bridge on the Internet.
Blaine Bryant posted
BIG BOY crossing the Arkansas River
J.B. Rail Photog shared

Thursday, October 3, 2024

1952,1997 Covered and 1886,1998 John Eisenhower Bridges near Gettysburg, PA

Covered: (Archived Bridge Hunter; no Historic Bridges; Satellite, 4,880 photos)
Eisenhower: (Archived Bridge Hunter; Historic Bridges; Satellite, 143 photos)

"Built in 1852 by David S. Stoner. On June 19, 1996, a flash flood knocked the bridge from one of its abutments. It was restored: over 75% of its original structure was used. It was reconstructed in 1996. The bridge was rededicated on July 21, 1997" The bridge is 101' (31m) long. [BridgeHunter_covered]

Street View, Aug 2012

John Kucko Digital posted
America the Beautiful:  Went WAY out of my normal range today to visit the 1854 Sachs Covered Bridge in Adams, Pennsylvania near Gettysburg.  This is considered Pennsylvania’s most historic covered bridge.  During the Civil War, both the Union and Confederate Armies used the bridge during the Battle of Gettysburg, it is said to be haunted (nothing sinister happened in my visit there today).  This magnificent bridge is listed on the National Register of Historic Places—I’ll have more on it in the coming days.

HistoricBridges
The bridge is 84' (26m) long.

Note only is this bridge pin connected, Historic Bridges points out the use of pipes with special castings for "both the portal bracing and struts throughout the bridge." Portal bracing would be the pipes across the top. I don't know what the struts are.
Street View, Aug 2024


Wood Arch, Deck Truss and Pony Truss Bridges over Eagle River in Eagle River, MI

1988 Wood Arch: (Archived Bridge Hunter; Satellite) Carries MI-26
Deck Truss: (no Archived Bridge Hunter; Satellite) Did carry MI-26, now it is a pedestrian bridge.
Pony Truss: (Archived Bridge Hunter; Satellite) Did carry Main Street, now one uses MI-26.
 
Adam Peterson, Jul 2022
 
Jul 2009 photo by Steve Conro via BridgeHunter_arch
This 152' (46m) long bridge has a main span of 79' (24m).

Joe Fishbein posted two photos with the comment: "Eagle River, Michigan, in the Keweenaw peninsula, has two interesting bridges over its namesake river. The deck truss dates to 1915, and originally carried highway M-26 (I drove over it many times when I was in school up here). In 1990, a timber 3- hinged deck arch was built for the highway,  and the old bridge was rehabbed for pedestrians. Two cool bridges over a very scenic river. My photos from today."
Andreas Jordahl Rhude: The southern pine structural glued laminated timber was manufactured by the former Sentinel Structures Inc at Peshtigo Wisconsin.
Pete Wessel: There’s also an old pony truss just downstream.
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Stevan Malovic, Oct 2017

This is the pony truss mentioned in Pete's comment.
Street View, Sep 2008
 
Aug 2011 photo by C Hanchey via BridgeHunter_pony

Stewart, Jul 2023

Stewart, Jul 2023

Wednesday, October 2, 2024

1912 11mwNet Wilbur Dam on Watauga River east of Elizabethton, TN

(Satellite)

These high flows were caused by Hurricane Helene.

"According to the TVA, the headwater at the dam hit an elevation of 1970.2′. The elevation set a new pool of record by three feet, the TVA stated." [wjhl]

Elizabethton/Carter County Priority News & Alerts posted two photos with the comment: "Wilbur Dam as of 3 hours ago [Sep 28, 2024, 5pm ET]!!"
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2

Looking at the gaps above the gates, the gates are significantly higher above than they are below. This photo also shows why the water is so turbulent in the right-descending spillway---the side of the mountain protrudes into the spillway.  You can also tell how far open the gates are by the angle of the lower braces to the gates. They are horizontal above, but they are barely above their closed position below.
Charles Smith, Feb 2015
 
Facebook reel
[Whenever I see the word "today," I try to add the date. But I could not figure out how to get a date for a Facebook reel! It showed up in my feed on 9/30/2024.]

TVA
"The dam is 76 feet [23m] high and stretches 375 feet [114m] across the Watauga River."

Here is another example of where the gates have been raised just a little.
Edward Hyle, Feb 2014

This was uploaded as "TVA Watauga Dam Visitors Center," but I recognized it as the Wilbur Dam.
Jesse M, Mar 2022, cropped

1948 63mwNet Watauga Dam on Watauga River near Elizabethton, TN

Dam: (Satellite)
Power House: (Satellite)

TVA
"At more than 1,900 feet above sea level, Watauga holds the distinction of being the highest reservoir in the Tennessee River system."
"Watauga Dam is 318 feet [97m] high and extends 900 feet [274m] across the Watauga River."

Elizabethton/Carter County Priority News & Alerts posted three photos with the comment:
We were very lucky because that water comes out and it’s not at a controlled rate down stream. 
Completed in 1948, Watauga Dam in Elizabethton, TN, features a Morning Glory spillway. With the crest at 1,975' elevation,  the Morning Glory has NEVER been used.
Because of heavy rainfall from the storm [Hurricane Helene] water levels rose to just 4 feet below the opening on Saturday! 
📸TVA
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Oct 1, 2024: The reservoir reached a record level of 1,979.29', which broke the previous record by about 3'. [wjhl] This record was caused by Hurrican Helene.

It is important that the spillway has enough capacity to handle a flood because the dam is an earthen dam. I wonder where the outlet of the spillway is located.
Satellite

This photo shows more of the dam.
TennesseeRiverValleyGeoTourism

Tuesday, October 1, 2024

1899 BNSF/GN Cut Bank Trestle over Cut Bank Creek at Cut Bank, MT

(Archived Bridge Hunter; no Historic Bridges; Satellite)

The trestle is 1,200' (366m) long. [RailroadGazette via BridgeHunter]

Looking North.
Street View, Oct 2023

Ken Edmier posted
An eastbound empty crude oil train crosses Cut Bank Creek on the Cut Bank Trestle Bridge.  Cut Bank, MT. 9/22/24

1 of 2 photos by James McCray via Bridge Hunter

dalejtravis
(Cut Bank Trestle, 1900) across Cut Bank Creek in Cut Bank, Glacier County, MT. US2 (Main St.) NW (curves SW) 0.7 miles from jct with MT213 (Central Av.) to the bridge to the NW. (N48 38.452 W112 20.741) Photo by Jack & June Schmidt 7-22-13.
 
theclio
"As we cross the bridge you can see the distinctive banks of the creek that give Cut Bank its name. Cut Bank Creek is the eastern boundary of the Blackfeet Nation. Before the Great Northern Railway arrived in 1890 to open a small station and construct one of the larger trestles on the line across Cut Bank Creek, few Americans had been to this area, though it was inhabited by the indigenous people of the Northern Great Plains. Meriwether Lewis and his small party traveled and camped along Cut Bank Creek over 200 years ago. Cut Bank’s population has varied widely over the last century, mostly in response to the ups and downs of the railroad and the oil and gas industry. In the 1970s, the town had over 5,000 residents; today it’s about 3,000 residents. Cut Bank is susceptible to extreme weather. According to the National Weather Service, the hottest temperature on record was 107°F (42 C) back in August, 1961. The coldest temperature on record is -47°F (-44 C) in February, 1936, and the coldest wind chill temperature is -86°F (-66 C)."
Seppo Hill-Ramier and Robert Catherman. "Cut Bank Creek." Clio: Your Guide to History. May 14, 2024. Accessed October 1, 2024https://theclio.com/entry/181058
 
1 of 2 photos by photobyjohnbo
"The images were captured with my Mavic Air drone on a dreary, cloudy day. I substituted a big Montana sky from another visit to the state."

1966/69 Cut Bank Quad @ 24,000