Sunday, April 12, 2026

1900 Winnibigoshish Dam on Mississippi River near Deer River, MN

(HAERSatellite)

Street View, Aug 2016

USACE, St. Paul District posted
We #TBT to April 22, 1882, when the first pilings were driven in for #WinnibigoshishDam, located near #DeerRiver, #Minnesota.  
The original dam, made in part from nearly 2 million feet of white and Norway pine, was replaced in 1899 by the concrete structure that still sits in Lake Winnibigoshish today. 
 The name Winnibigoshish is #Chippewa, meaning rough water.

John Weeks
"The original dam at this location was a wooden dam started in 1881 and finished in 1884. It was replaced with a concrete dam in 1899-1900. A 12-foot log sluice and a 5-foot fish ladder was added in 1912. These additions are no longer in use. The bridge deck was added in 1909, and rebuilt in 1990.
"This was the first major reservoir built on the Mississippi River. The US Army Corps of Engineers report that the dam and reservoir were built to be a resource that would benefit the entire nation. Water released from northern reservoirs would help make the shipping season more predictable and safer. Today, the dam is used to keep the lake at a constant level of 1,297 feet above sea level. The shipping lanes are now managed by downstream locks and dams, leaving the lake available for recreational purposes.
"The lake is 67,000 acres, with about 140 miles of shoreline. Unlike lakes in the Brainerd Lakes area, Winnibigoshish remains mostly undeveloped. As the fifth largest lake in Minnesota, it is considered to be the crown jewel for fishing, and some of the best walleye fishing in the world. One key to the excellent fish habitat is that this lake is located on a major river, which keeps the lake flushed clean."

hmdb

The Corps of Engineers dates back to the Revolutionary War. On June 16, 1775, the day before the Battle of Bunker Hill, the Continental Congress appointed a Chief Engineer and two assistants for the Grand Army; a few years later, in 1779, Congress formally established the Corps of Engineers.

In 1860, Major General Warren, the first St. Paul District Engineer, performed field surveys in the Mississippi River Headwaters region. Ten years later, Congress authorized a study to determine whether a series of dams and reservoirs constructed in this area could assist in stabilizing water flow in the Mississippi River between St. Paul, Minnesota, and Prairie du Chien, Wisconsin. As a result of these studies, the St. Paul District designed a system of dams capable of raising water levels and storing annual spring runoff in six existing lake systems, for release when low water downstream caused hazards to navigation. Congress funded the Headwaters projects, and the dams were constructed and placed in operation between 1884 and 1912.

Today, by a series of locks and dams, the Corps maintains a 9-foot deep navigation channel below Minneapolis, Minn. The Headwaters reservoirs no longer serve the purpose for which they were constructed, but do provide flood control and storage for additional water during periods of drought, and offer outstanding opportunities for water-based recreation activities. In addition, the lakes support major populations of fish, and provide habitat for a number of furbearing mammals. The forests, marshes, and wetlands also furnish a haven for many species of wildlife and waterfowl.

Winnibigoshish Dam, located on the Leech Lake Indian Reservation, was the first constructed in the system of six dams. It is located on the Mississippi River 170 river miles from its source in Lake Itasca and 1,244 river miles from its mouth at the Gulf Coast. The original structure, built at the outlet of the lake and completed in 1884, was of timber-crib on timber piles. By 1903 the timber structure had deteriorated and was replaced by concrete. Today the dam is a 162-foot-long concrete structure on timber piles. It controls the runoff from a 1,442-square-mile drainage area that includes 28 lakes. The original construction was done by a crew of about 300 skilled and unskilled workers at an initial cost of $75,000.

Lake Winnibigoshish (67,000 acres in size, with 141 miles of shoreline) fills a basin formed by a huge ice block left behind by a receding glacier, and is surrounded by glacial deposits. Several archaeological sites along the shore provide evidence of prehistoric settlements. The Ojibwa named it "miserable-wretched-dirty-water" (Winnibigoshish) because of the effect of storm winds churning up the muddy bottom.


hmdb
"This timber dam at Lake Winnibigoshish was the first in a system of six dams built in the Headwaters of the Mississippi River. ca. 1898, Minnesota Historical Society"

hmdb
"This 1880 log sluice in a northern Minnesota dam allowed a sufficient volume of water through to carry logs to the next logging dam. ca. 1880, Minnesota Historical Society"

hmdb
"Lake Winnibigoshish Dam and Reservoir. ca. 1975"

hmdb
"In 1885 laborers at Lake Winnibigoshish were paid $30.00 per month. ca. March 1884"

Significance: The Lake Winnibigoshish Reservoir Dam is one of six Mississippi River Headwaters Reservoir dam sites that are historically significant for their association with navigation, commerce, tourism, the Ojibway Indians, and U.S. Indian policy in Minnesota in the late 19th century. 
By providing a consistent flow of water throughout the navigation season, the Winnibigoshish Dam enhanced navigation and aided in the commercial development of the Upper Mississippi River. The dam site was also one of the earliest non-Indian settlements in the region and by the late 19th century was attracting some of the first tourists to the area.- The dam had a devastating impact on the Ojibway Indians who lived along the lake's shores. The project precipitated a century-long conflict between the tribe and the U.S. government over the damages resulting from the inundation of tribal lands and property.
[HAER_data]  

HAER MINN,31-DERIV.V,1--2
2. Downstream view of dam, looking northwest - Lake Winnibigoshish Reservoir Dam, Deer River, Itasca County, MN

Not everyone was as enthusiastic about the addition of the dam on the Mississippi. The Ojibwe band that lived in the area was greatly affected and in a detrimental way. The dam was constructed on Ojibwe land without consent from the tribe which wedged the first ax between the Natives and the Corps. When the dam was completed, the water level of Lake Winnibigoshish rose 14 feet, which subsequently caused the village, gardens, and traditional burial grounds to be flooded and destroyed. The Corps estimated that around 23,240 acres of Ojibwe land was flooded. The rise in water level also deepened the shallow fishing grounds that the band relied on for net fishing. This hurt the tribe’s food supply greatly as the netted fish supplied a significant portion of the food supply. Hay that grew along the lake shore was lost, along with many cranberry marshes, and some maple trees. In 1889, the Rice Commission determined that the band’s wild rice marshes were also severely damaged.

According to the Ojibwe, the high water had completely washed away the bones of their ancestors. This greatly upset the Ojibwe not only because part of their heritage was gone, but also because the government promised to move the cemetery and gardens to higher ground, but never did. Sho-kah-ge-shig, a spokesperson for the Winnibigoshish Ojibwe at the time, described the devastation:

“There are no persons who have been so badly damaged. Look around here. It is not fire that makes it look so barren around the lake. It is the effect of the water caused by the overflow.”

The federal government offered to pay the Ojibwe for damages as well as future damage that would be caused due to prospect of more dams being built. This came with a price tag of $15,466.90, but the Ojibwe rejected it. Negotiations kept going on until the Ojibwe saw no alternative but to relocate to the White Earth Reservation in western Minnesota. As part of the agreement reached during negotiations, the proceeds from land sales and improvements went to the reservation.


Headwaters History Booklet via USACE
"Lake Winnibigoshish Dam during construction, 1899"

1914 Coon Rapids Dam on Mississippi River at Brooklyn Park, MN

(Satellite)

The dam was built in 1914 for hydroelectric power. The dam was shut down in 1966 after becoming too expensive to operate. The dam was donated to a local park system. Starting in 2012, the dam got maintenace work to be a barrier to Invasive (Asian) Carp. [mnhs]

Al Schirmacher posted
Coon Rapids Dam
Brooklyn Park Minnesota

AnokaCountyParks

dnr
"The dam was modified in the mid 1990's to provide a new walkway and new gate system. In 2005, a major scour hole on the downstream side of the dam was repaired. When new scour damage was confirmed by an underwater sonar scan in 2009, a decision was made to look at all issues of concern related to the dam: scour damage, longevity and operability of the rubber gates, and the need to prevent the passage of invasive fish species."

AnokaCountyHistory
The dam is near a half mile long.

I could not find what the generation capacity used to be.

Saturday, April 11, 2026

1891 Lower Bridge over Pine Creek at English Center, PA

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

HAER PA,41-ENGCE,1--2
2. 3/4 VIEW FROM NORTHWEST. - Lower Bridge at English Center, Spanning Little Pine Creek at State Route 4001, English Center, Lycoming County, PA

HAER PA,41-ENGCE,1--3
3. 3/4 VIEW FROM WEST

Nathan gives this bridge his highest rating, namely two 10s.
HistoricBridges
"This is a bridge so bizarre and unique that it defies classification. It has been called a truss bridge, a suspension bridge, and even a 'two-hinged inverted trussed arch' type bridge. The confusion arises from the fact that this bridge has the characteristics of an eyebar chain suspension bridge, but it also has diagonal members, which are not part of a normal suspension bridge. According to the Historic American Engineering Record, a structural analysis was composed and the bridge was found to function more as a truss than a suspension. Further, they suggested that based on their analysis, the bridge could be called a two-hinged inverted trussed arch.
"Among those structure type choices, HistoricBridges.org has categorized the bridge as a suspension bridge, because of the manner in which the eyebar chain continues past the towers beyond the bridge span itself down to an anchorage. Further, although the diagonal members/braces may act to help stiffen the bridge, the structure's design also features a more traditional form of suspension bridge stiffening, in the form of a shallow deck plate girder, which contributes to the suspension bridge appearance. Finally, classifying it as a suspension bridge on this website seemed logical because not only would most average people looking for this bridge think of the design as a suspension, but the eyebar suspension bridge type would have been a well-known and familiar bridge type in 1891, while on the other hand it is questionable whether engineers in 1891 even knew of a bridge type called a two-hinged inverted trussed arch, even if modern engineering analysis does prove that the bridge functions as such."
"Jim Barker, a historic bridge engineer, commented that he was fascinated by this bridge and was impressed with how it made one of the most efficient uses of materials possible, meaning the total amount of metal in this bridge for its length is relatively small, and constructing a more traditional structure such as a Pratt truss bridge would have used a lot more material in comparison.
"The efficient design of the Lower Bridge speaks to the ingenuity of Dean and Westbrook, the engineers and contractors for the bridge. This is particularly interesting, because Dean and Westbrook do not immediate give the impression of being heavy duty engineers. This is because their main claim to fame was erecting bridges fabricated by another company, since they were agents of the Phoenix Bridge company, and commonly acquired and erected truss bridges that were fabricated by the Phoenix Bridge Company with their trademark Phoenix columns. Dean and Westbrook would take their bridges, erect them, and affix their ornate and distinctive plaque to the bridge. The Lower Bridge does not have Phoenix columns and it does not appear that Phoenix Bridge Company was involved. The Lower Bridge does have the traditional Dean and Westbrook plaque design however. Given that so many bridges built by Dean and Westbrook were associated with Phoenix Bridge, the Lower Bridge is noteworthy as a rare example of a bridge that was entirely the work of Dean and Westbrook. Given the complexity and efficiency of the design, it reveals that Dean and Westbrook were more than just salesmen to be sure, and indeed were very gifted engineers."

"Significance: The Lower Bridge at English Center is the only remaining bridge oftwo completed in 1891 to provide access to this once-important regional logging and tanning center. One of few surviving shortspan roadway suspension bridges in Pennsylvania, the Lower Bridge is also an unusual variant of a braced-chain bridge. The bridge was listed in the National Register of Historic Places in 1978." [HAER_data]

Linda has two drive-over clips at the end. They are worth watching because of the sound. The bridge not only has a metal grate deck, but it also creaks and groans as the vehicle goes over.
Facebook Reel

Friday, April 10, 2026

Road Bridges over Little Wabash River in Carmi, IL

1878: (Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; Satellite)
1916: (Archived Bridge Hunter; Bridge Hunter)
1949,1999: (no Archived Bridge Hunter; Bridge HunterSatellite)

Lisa Ruble posted
CARMI BRIDGE IS RAZED BY STORM ON JUNE 21, 1915
Dwellings, barns and telephone poles felt the force of the storm.
Bridge across the Little Wabash north of Carmi in the summer of 1915. The bridge had replaced an 1841 covered bridge in 1878. Plans were being made in September 1915 to build a new bridge.
JUNE 5. 1915
Carmi --Following the continuous rains a portion of the west abutment of the wagon bridge across the Little Wabash River at this place fell Wednesday morning, June 2nd, making the bridge very unsafe. The bridge has been condemned for a number of years following the happening Wednesday, the approaches to the bridge were nailed up and traffic across it was stopped. The foot walk is not closed, and people are allowed to walk the bridge. A large portion of the sandstone abutment that has not fallen at the west end is badly cracked. It is not known definitely yet just what steps will be taken in the matter. It is probable that a state engineer will be called to Carmi to inspect the bridge and the council will probably act on his advice.
Sources: Edwardsville Intelligencer (1915), Mount Carmel Evening Register (1915)

Carmi Sesquicentennial book 1816-1916 via Melissa Brand-Welch via BridgeHunter_1878

BridgeHunter_1878

BridgeHunter_1878

BridgeHunter_1878

1916 Bridge


BridgeHunter_1916

BridgeHunter_1916

BridgeHunter_1916

The 1949 (current) bridge is a steel-girder bridge with 84' (25.6m) spans. It was rehabilitated in 1999. [BridgeHunter_1949]

1957,1992+202? I-476 Hawk Falls Bridges over Mud Run in Carbon County, PA

1957: (Archived Bridge Hunter; Bridge Hunter; no Historic Bridges; Satellite)

Bridges Now and Then posted
"View of the Hawk Falls Bridge under construction. The image is from July 26, 1956." (Courtesy of the Pennsylvania State Archives)

modjeski

modjeski
"The Hawk Falls Bridge Replacement Project is progressing, with construction estimated to commence in 2021. The replacement Hawk Falls Bridge will be a 720’ [219m] long steel structure featuring a 480’ [146m] deck arch span flanked by four 60’ [18.3m] deck plate girder spans. As with the current bridge, the new bridge will carry two traffic lanes in each direction, but it will also provide 12’ wide outside shoulders and 6’ wide median shoulders. Three welded, steel box arch ribs will be utilized to create an aesthetically pleasing structure that spans the deep Mud Run Valley located within Hickory Run State Park"

modjeski_replacement
"Nearly 3,500 tons of structural steel were used, with most external components made of uncoated weathering steel. This material blends with the site’s natural color palette and offers a durable, low-maintenance solution. Vierendeel struts between the arches, and the absence of spandrel column bracing creates a more open, graceful appearance, ensuring the bridge harmonizes with its surroundings."

pahistoricpreservation, courtesy of the Pennsylvania Turnpike Commission
"The bridge consists of a 738-foot [225m], three-span, continuous deck truss, with a single-span I-beam approach at each end. It was one of the tallest bridges on the Pennsylvania Turnpike system, with its road surface approximately 195 feet [59.4m] above Mud Run."
The replacement was supposed to be done by 2025. I'm writing this in Apr 2026 and it is not done.

rettew

aisc

hillintl

lsc-pagepro
"The arch ribs were erected using cranes located behind the abutments. Modjeski & Masters"

lsc-pagepro
"The arch rigs' box section had to be large enough for an inspector to walk upright wearing a hardhar. Theresa Davies"


Thursday, April 9, 2026

1911 Salmon Falls Dam on Salmon Falls Creek near Twin Falls, ID

(Satellite)

Twin Falls is on US-30 (Lincoln Highway). (US-30 goes northwest and joins US-20.)

The Facebook Reel below confirms that the road is just a single lane across the crest.
Street View, Aug 2021

Street View, Aug 2021

"The Salmon Falls Dam was built in 1910 to provide irrigation water for farms but now is an important recreation site. The BLM operates Lud Drexler Park just above the dam.Anglers will find their prayers answered here, with plenty of brown trout, chinook and kokanee salmon, yellow perch, black crappie, channel catfish, smallmouth bass, and walleye. This is the premier walleye fishery in Idaho, and trophy catches are common." There is also Class I and II floatable opportunities from mid-April to late June. [blm]


Facebook Reel

WickershamsConscience
"About 224 feet [68m] tall, with a width of 450 feet [137m], the dam creates a 15-mile long reservoir, holding at peak about 230,650 acre feet (0.28450 km3) of water in a long,very narrow gorge."
The dam is privately owned, and WC points out that the leaks look rather scary.

I could not find a spillway for this dam.

Wednesday, April 8, 2026

1944 New York Delaware Aqueduct Water Supply has an 85-mile tunnel, world's longest

Inlet Portal: (Satellite)
Outlet Portal: (Satellite)

The Delaware Aqueduct goes from Rondout Reservoir to Yonkers, NY. [wrrv_project]

"The massive tunnel can be as wide as 19 feet [5.8m] and as deep as 2,500 feet [762m] underground, and supplies nearly half of New York City's water."  [wrrv_longest] This source claims that the tunnel is 105 miles long. I think that is the length of the total aqueduct. The tunnel is 85 miles long.

This is one of the sources that provides the tunnel length of 85 miles.
Facebook Reel

11:00 video @ 3:51 (source)

Better resolution:
NewYorkAlmanack

Technically, the tunnel is a siphon. The water is under significant pressure when it goes under the Hudson River under Newburgh, NY.
@ 4:18
[39 cubic meter/sec is 1,377cfs.]

Another segment of the Delaware Aqueduct moves the water from the Kensico Reservoir to the Hillview Reservoir, which is the official termination of the Delaware Aqueduct in Yonkers, NY.
@ 5:06

They have also built bypass tunnels under each of the reservoirs so there is a continuous tunnel from the Rondout Reservoir to the Hillview Reservoir.
@ 5:23

@ 6:44
By 2012, it was estimated that the aqueduct was leaking about 35mgd. And it had been leaking that much for at least 25 years. The video was made in 2020, and the bypass tunnels around the leaky sections were supposed to be done in 2023 and cost $1.5b.

I'm writing this in 2026, and the bypass "is not expected to be completed until after 2027." And they are now talking $2b. [nyc_new_contract]

parsons
Nora is the name of the Tunnel Boring Machine that is being used to dig the bypass tunnel.

The tunnel north of the West Branch Reservoir is 13.5' (4m) in diameter. [parsons]
The tunnel south of the Kensico Reservoir is 19.5' (6m) in diameter. [britannica]

wrrv_project
When they are ready to connect the bypass tunnel to the original tunnel, they will have to shut down the aqueduct so that they can dewater it. They will shut it down between October and June because Winter has the lowest water usage. 

The October shutdown was supposed to happen in 2022, and then in 2023, and then in 2024. 2024 was skipped because of draught conditions. [drbc]
Because of the delays, the contract expired. Since a new procurement process is needed, some more Winters are going to be skipped. [dep_contract]

3:10 video @ 0:15
Delaware Aqueduct Bypass Tunnel Steel liners

1:43 video @ 0:26
[In the video, they show the Croton Dam instead of the Rondout Dam.]