Last week one of our C-23 Sherpas flew into a US operated airfield in Iraq during the day and saw there was construction equipment on the runway. Yet there was no NOTAM (notice to airmen). A trench was being dug in the runway, and it was not marked. It Well, it seems the construction continued and still was not marked or NOTAMed or anything. A C-130 landed on the runway the night of the 29th and didn't see the construction. It wound up going through what is now a large pit on the runway. A few pictures are attached. The C-130 was totaled. There were several injuries to the crew and the few passengers that were on board but luckily nobody was killed. Quite the set of failures somewhere in the system regarding this improper construction a