[Freedom_Is_Not_Free]

It looks like more than 440 miles to me. It seems to easily span Texas, which is some 800 miles across. Oh well, my eye must be deceiving me.

[TXnMA]

The article gives 700 KM as the RADIUS of the sphere of water.

My "Dashboard Converter Widget" gives

1400 KM = 869.91967 Miles (rounds to 870 Miles)

for the DIAMETER of the sphere.

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'Pears to me that your 'guesstimate' of 800 miles for the span of Texas is pretty close to the mark!

Google Earth's "Ruler-Line" tool gives the straight-line span of Texas from Toledo Bend on the Sabine River to El Paso to be 775 Miles. Taking into account surface curvature, your "some 800 miles across" is pretty dang close!

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I'd say you have a pretty good "Mark One Eyeball" there, FRiend!! '-)