Norwegian to English Tech/Engineering Construction / Civil Engineering Bridge/road construction

"Pel 1,2 og 3 peles 44 m" from the folloing text: "I akse 2 har de to første pelene truffet fjell. Avviksmelding er levert og bygg-herren ber om at disse pelene heves ca 0,5 m og videre peler heves ca 1,0 m i forholde til dette. Pel 1,2 og 3 peles 44 m. Byggherren minner om at de siste 15 m av pelene skal peles vannfylte."

This text is from the minutes of a meeting, so there is not a lot of context provided, but I have always had a problem getting my head around the terms pel, pele, peles, pelning etc. Sometimes it seems that pelning is interchangeable with 'peilning'.
I am never quite sure whether they are referring to chainage, pile-driving etc., or haw to translate it to English, especially when the word is used as a verb, as here..

If anyone can refer me to some good reading references on the subject, I would greatly appreciate it