(
Satellite, 295 photos)
This is one of those topics for which I can't believe I don't have any notes. So it is time to get them started.
USACE, St. Louis District
posted two images with the comment:
Rend Dam is owned and operated by the St. Louis District and is located in Benton, Illinois on the Big Muddy River. Rend Dam creates Rend Lake, which helps reduce flood risk, supply water to nearby communities, provides habitats for fish and wildlife, and provides recreational opportunities. To learn more about Rend Dam and plan your visit, go to
https://www.mvs.usace.army.mil/Miss.../Recreation/Rend-Lake/.
 |
1 |
 |
2 |
The spillway in the photo is a small fraction of the length of the dam.
Like California, this dam was built for water supply. (Most big reservoir dams in the Midwest are funded for flood control.)
"For decades the land surrounding Rend Lake was plagued by lack of water - despite plentiful rainfall, and its location between two of the nation's great rivers, the Mississippi and Ohio....The land's impermeable clays were incapable of soaking in rain, making ground water scarce. By the 1950's the onset of an economically devastating three-year drought, took its toll on the region. As a result, plans to construct a large water supply lake began to take form, one that would be the solution to the area's problems, and evolve into the project that would become Rend Lake.... It supplies over 15 million gallons of water per day to 300,000 persons in over 60 communities." [
USACE_history]
I have not found a length for the spillway or dam, but judging from Google Maps, the dam is about 2 miles (3km) long, and the spillway is about 450' (140m) long. The spillway "notch" is about 30' (9m).
Given that the lake has reached a height of 413.83', I assume that 405' is the height of the bottom of the notch and 410' is the height of the top of the notch, which is the height of the main spillway. That means during the May 1995 flood, the water was almost 4' (1.2m) deep over the crest. That would have been getting kinda close to the top of the dam.
Looking at Google Earth, only the Mar 2015 view was using the entire spillway.
 |
Google Earth, Mar 2015 |
On the other hand, just a couple of Gobal Earth views had a dry spillway.
 |
Google Earth, Oct 2017 |
Apr 5, 2025:
 |
WFCN News - Swinford Media Group posted @ 0:01
Here is a look at the Rend Lake Dam as of this [Apr 5, 2025] afternoon, which is already overflowing due to excessive rainfall. The lake is expected to crest later in the week. 📸 Reporter Aaron Price Dylan Henry: It's highest crest ever was 413.83 in 1995. It's currently just over 411. Almost 7 feet over normal pool. [According to some more comments, it got up to 413.57' around Apr 7 at 5:28pm.] |
 |
@ 0:11 |
Enjoyed looking at the article. Each historic bridge has a unique story, and I simply feel it should be told as accurately as possible which I why I felt the need to point out the length issue. The story of this bridge is certainly very unusual... the construction of a monumental sized bridge not out of need, but out of politics. It also is one of the few large-span bridges that famous engineer Joseph Strauss actually designed (given that he didn't really have as much to do with the Golden Gate as he and his statue would have you believe). Strauss proposed a design for the Blue Water Bridge in Michigan that was not accepted, but clearly was based off his design for this bridge.
The story of Pont de Quebec is also quite a story, where the effort to construct the world's longest cantilever span took two tries and took the lives of 88 people.