By December, nine 3-inch and two 2-inch Hamel pipelines and four 3-inch and two 2-inch Hais cable pipelines had been laid, a total of 17 pipelines,[46][49] and Dumbo was providing 1,300 long tons (1,300 t) of petrol per day.[48] Not one of the Hais cable pipelines broke, and the mean time between repairs of the Hamel pipelines varied between 52 and 112 days, with 68 days being the average. They could not be run at the intended pressure, so they carried only petrol, and plans for the pipelines to deliver aviation spirit as well were discarded.[46][49]