30th June 2014, 12:32 PM
My experience of many schemes is that the architect's drawings of drainage as passed through planning are purely 'indicative' anyway [often the plans even state this, if you read the little teeny tiny notes by the drawings, often in really quite bad handwriting and extremely fuzzy after copying and passing through several fax machines] and are rarely followed particularly closely by the drainage contractors anyway - in reality they often just make it up as they go along and dig immense holes where they feel like it, while the monitoring archaeologist stands by wringing their hands and wondering why they bothered meticulously hand-excavating and recording the drainage trenches as shown on the plans somewhere completely elsewhere...