RALEIGH - The N.C. Department of Transportation has determined that for safety reasons, it will not be able to repair the pipe break that created the sinkhole on Hammond Road in south Raleigh by sending workers down into the hole, which is more than 25 feet deep. Crews will instead refill the sinkhole and re-pave the road, with the anticipation that the southbound lanes can be re-opened sometime late Friday.
The repairs will instead be done by boring into the pipe location from a side embankment along Hammond Road, and installing the new pipe in that manner. This will not require the closure of the roadway, with the exception of some possible brief lane closures as the construction equipment is put in place. There is not a timetable as yet for when that work will begin.
To prevent any additional damage underground by water, crews will cap the pipe to stop water from getting to the broken section. There is sufficient storage upstream to pond the water, and then pump off that water.
The sinkhole developed last week, forcing the shutdown of the two southbound lanes of Hammond Road at the Rush Street intersection. Initially it was a five-foot wide sinkhole. Crews determined that a three-foot pipe under the roadway had failed. They dug up the roadway to get a better idea of the cause and how to repair the problem. That was when it was determined to use the boring solution to fix it.
The site has been barricaded off for the safety of motorists, cyclists and pedestrians in the area. Drivers on southbound Hammond have had to turn right at Rush Street toward South Saunders Street, or left toward Garner Road. Until the road is re-opened, they are reminded to allow extra time when traveling through the area, or to seek an alternate route. Northbound Hammond Road lanes have remained open.
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