The drama continues. The county culvert that dumps runoff onto my property has never flowed freely, causing water to back up & flood on the opposite side of the road, then washout the road in front of my place, four times in 30 years. After begging the county for help, (fat chance) I finally figured out that the phone company, 30+ years ago, trenched through the culvert, and laid a phone cable in it, creating a "snare" to catch stuff & plug the culvert. (Tell me that crew of morons couldn't tell they were trenching through a 16" steel culvert.
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The county finally agreed there was a problem, (and a common one in Coconino county) and this is their solution. They dug up the offending area, cut off about 11' of culvert, had the phone company re-route the cable underneath, spliced another piece of culvert on, did not clear the sand/gravel/clay/rocks in the old section, and buried it. ("The obstruction will wash out naturally.") They promised to come back & clear the opposite end of the culvert of dirt so that only water will go in the culvert, but never came back after almost a year of prompting. I took my little backhoe & cleared some of the dirt away away from the input end, and shoveled/chiseled/hoed about 5' of the culvert clear, and we will see how long (if at all) it takes to wash the pipe clear. I have a feeling that earth will look like the last pic before that culvert is clear.
1st pic shows cable through culvert, 2nd, the cut off culvert full of crap as buried, 3rd, re-routing the cable, 4th, the input side side with dirt halfway up.