wet wet posted a link to John Matel's blog and I dropped John a line to see if he had anything to add. He's based in the Rutbah area with the US State Dept and kindly replied below -
I guess that answers the OP's question.
(PS. Spot on with the water courses India.)
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Please feel free to post this.
I have seen and been in that fort. My blog entry re is below. The Iraq police were still using it when I was there. You can see by comparing the pictures that it is the same building featured in the airport pictures. Rutbah has grown around the fort and the actual airstrip is probably under the road in the lower picture.
World-Wide-Matel: Mad Dogs & Englishmen
This link shows the inside of the old fort
World-Wide-Matel: COPS
Our U.S. bases were well outside town. You can see about them here.
World-Wide-Matel: Water, Water Everywhere but Not a Pipe to Link
Finally, if you want to read about Rutbah in general, follow this link
World-Wide-Matel: A Quick Look Around Western Anbar
Hope this helps.
John Matel
U.S. Department of State