Wednesday, August 31, 2022

1840+1956+1970 Green River Lock and Dam #1 at Spottsville, KY

(Satellite)

The lock is 600' long, but only 84' wide and the dam was completed in 1970. [TheTownTalk] Normally a USACE lock is 110' wide because barges are 35' wide.

The USACE claims the existing dam was built in 1956, but I believe the 1970 date in TheTownTalk because the dam uses a cell structure. I thought the cell structure construction technique was a 21st Century development. I wonder if this 1970 dam was one of  the first applications of that technique.
Satellite

The US-60 Bridge is in the right background of this photo.
1:14 Aug 2022 video @ 0:14

USGS
The river gauge located here not only measures the usual stream data of gage height, discharge and stream velocity, it measures water quality data as part of the Mississippi River Basin Healthy Watersheds Initiative. The water quality data is "dissolved oxygen, nitrate plus nitrite, pH, specific conductance at 25°C, turbidity and water temperature."

In this flood, the dam and lock walls are completely submerged.
USGS

While editing the Spottsville bridges notes, I noticed you could not see the dam in a satellite image. But you can see the lock walls. I fired up Google Earth to get a date for this image. It was May 2022.
Satellite

April 2025 Flood:
Arden Gregory - 14 News posted on Apr 11, 2025
THIS is why U.S. 60 is closed between the Spottsville Bridge and the Henderson/Daviess County line. The top photo is from Google Earth. The bottom photo was taken by the National Weather Service on Thursday, April 10. This is the perspective from Reed looking toward the Green River and Spottsville.
[Reed is east of Spottsville, and the county line is further East.]

Since we are looking West, Lock and Dam #1 is to the left of the US-60 Bridge. Obviously, it is under water.
Digitally zoomed

US National Weather Service Ohio River Forecast Center posted
Major flooding persists in the lower portions of the Green, Wabash, and mainstem Ohio Rivers.  These will slowly start to recede as all the water in the lowlands and farm fields of the lower Ohio Valley makes its way to the Mississippi.

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