Water Depth under Gregory Arch?
- Thread starter 996scott
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fstop
Active Member
This was about a week ago. For reference our boat is a 260 Sea Ray. Plenty of room for almost any boat. We went back to the back of Fiftymile, it wasn't far before we had to turn around. Don't forget to look for the Moqui steps on the left just before you see the arch. It amazes me/us every time we pass those steps and wonder how they made it up there without falling.
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JFRCalifornia
Keeper of San Juan Secrets
Right now there's about 24 feet of maximum clearance overhead. Underwater it might range up to 40-50 feet, particularly to the right as you head upstream, less than 40 feet on the left side. Sedimentation over the past 60 years may have reduced those estimates a bit. Here's a useful thread that hits on the same topic...
At that point, the water underneath will be about 40-50 feet deep at most, but not uniformly that deep.... Here's a couple of photos to show you what the bridge looks like at really low water...
The photo below was taken on August 6, 1964, when the lake was at 3487.
And here's another shot, taken the same day...
This photo below was taken just three months earlier, in May 1964, when the lake was at about 3400, which is to say, the lake didn't quite...
...and here's what the bridge would look like with no lake at all...
At that point, the water underneath will be about 40-50 feet deep at most, but not uniformly that deep.... Here's a couple of photos to show you what the bridge looks like at really low water...
The photo below was taken on August 6, 1964, when the lake was at 3487.
And here's another shot, taken the same day...
This photo below was taken just three months earlier, in May 1964, when the lake was at about 3400, which is to say, the lake didn't quite...
...and here's what the bridge would look like with no lake at all...
Last edited:
fstop
Active Member
My reading skills are slow. I can see you asked for depth below now. JFR response is spot on. I remember the depth finder showing around 20’ below our boat.