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| Doug Chapman posted Delaware Dam on the Olentangy River. Doug Chapman shared with the comment: "Delaware Dam near Delaware Ohio on the Olentangy River. Built 1951." |
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| 1808delaware "The dam is 3.5 miles [5.6km] long and 92 feet [28m] high, and controls a drainage area of 386 square miles through the use of five gated sluices and six 25-foot by 32-foot tainter[Parker]/radial gates." |
I was surprised by the length of the dam, so I took a closer look at a satellite image. The part that went east of the spillway to Horseshoe Road was obvious. Then I noticed that the western part goes North along US-23 and then turns west up by Wiley Road
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| Satellite |
In fact, US-23 appears to be an emergency spillway.
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| Street View, Aug 2025 |
There are campgrounds in the floodplain. So I hope they do a good job of getting the campers evacuated before the grounds become flooded.
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| Satellite |
The spillway capacity is 96kcfs. [delaware-county]
A satellite image caught the dam with three of its sluice gates open.
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| Satellite |
Three gates is the max flow I saw looking at Google Earth images. When the flow is smaller, we can see the wall for the stilling basin.
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| Google Earth, Sep 2021 |
It looks like the reservoir was holding flood waters in Spring 2019.
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| Andrew Marchand, Apr 2019 |
And again in Spring 2020.
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| Shawn Blevins, Mar 2020 |
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