tag:blogger.com,1999:blog-7577633936396294153.post2995539504216011029..comments2024-03-28T23:07:57.649-05:00Comments on Industrial History: MWRD: Building the 1911-22 Cal-Sag ChannelDennis DeBrulerhttp://www.blogger.com/profile/13992361354510209661noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-7577633936396294153.post-80165203407810298262024-02-24T04:06:24.138-06:002024-02-24T04:06:24.138-06:00Ah, seeing a study saying that the depth and regul...Ah, seeing a study saying that the depth and regular pool elevation (-2.0 ft CCD) is 12-16 feet. That said, still curious what the constructed height is from the bottom of the rock cut to the top of the embank walls?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-43991787917511092562023-09-19T23:37:51.584-05:002023-09-19T23:37:51.584-05:00This comment has been removed by a blog administrator.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-74697340356556334832023-03-24T01:55:03.248-05:002023-03-24T01:55:03.248-05:00Does anyone know how deep the channel is? I've...Does anyone know how deep the channel is? I've seen mention of it being "maintained to a depth of 9 feet." And, well, does that simply mean that it's actually deeper in places than that? Also, from where is this 9 feet (or whatever the number it is) measured?<br /><br />Also, supposedly, the Little Calumet is deeper than this. If so, that must mean that the Chicago Sanitary and Ship Canal on the west end must even be deeper; otherwise, the the river couldn't be drained west, right?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-27093386400475713292022-01-30T12:51:09.064-06:002022-01-30T12:51:09.064-06:00This comment has been removed by the author.Dennis DeBrulerhttps://www.blogger.com/profile/13992361354510209661noreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-88135095839151773792022-01-23T17:53:14.015-06:002022-01-23T17:53:14.015-06:00I went to the bridgehunter.com website and it docu...I went to the bridgehunter.com website and it documents 22 of the current or former rail and road bridges that cross the Cal-Sag Channel. The earliest construction date of the bridges is 1933 (including the multiple railroad bridges). If the canal was completed in 1922 but the bridges over the canal were not completed until 1933 how did trains and auto's get over the canal during that first 11 year period? I imagine the railroads had their tracks already in place well prior to 1922, it does not seem they would have tolerated an 11 year disruption to their mainlines waiting for the bridges over the canal to be constructed?Anonymoushttps://www.blogger.com/profile/01364821146930416346noreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-32938647581207245712021-03-05T18:39:55.510-06:002021-03-05T18:39:55.510-06:00The moraines consist of all sort of rocks scraped ...The moraines consist of all sort of rocks scraped down here from the north, including granite. They talk about erratic granite boulders in Illinois that were pushed here by glaciers. But the bedrock they are digging through in the photo is either limestone or dolostone.<br />https://industrialscenery.blogspot.com/2014/08/limestone-vs-dolomite-vs-dolostone.html<br />The bedrock close to the surface around here tends to be dolostone because it is more resistant to erosion.Dennis DeBrulerhttps://www.blogger.com/profile/13992361354510209661noreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-69360808360195479672021-02-22T08:22:11.439-06:002021-02-22T08:22:11.439-06:00Limestone
Limestone<br />Anonymoushttps://www.blogger.com/profile/12406378004663354182noreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-17348061082651428062020-08-28T11:16:46.938-05:002020-08-28T11:16:46.938-05:00What are some common type of rock that was left be...What are some common type of rock that was left behind? Anonymoushttps://www.blogger.com/profile/15436145690184531367noreply@blogger.comtag:blogger.com,1999:blog-7577633936396294153.post-15217274574899909872020-08-03T10:15:53.745-05:002020-08-03T10:15:53.745-05:00Nice pictures. A moraine is an accumulation of ro...Nice pictures. A moraine is an accumulation of rock and debris deposited by a glacier after it melts. The Palos area was the furthest site of glaciers during the last ice age.Martinhttps://www.blogger.com/profile/16913500094949567938noreply@blogger.com