PYFB,
New Delaval Colliery sunk on a green field site in 1859. Initially owned by Seaton Delaval Coal Company. Initially called The Foster Pit ( My g grandfather's wedding cert in 1862, records his residence as Foster Pit, )
From 1927 to nationalisation in 1947 owned by
Hartley Main Collieries Ltd.
Normally as new pits were being sunk, housing, estimated to be sufficient to house the required number of workers, was simultaneously being built. However they only managed about 300 homes, for a pit that needed 600 men .
In 1873* 2-300 hewers were "trained" in daily from Seaton Delaval to make up the numbers.
*In the 3rd May 1873 edition of the Newcastle Weekly Chronicle, the reporter remarked that New Delaval had a library to keep folk busy, while Newsham only had pubs. But Newsham folk had " privies" whereas ND folk only had ash pits.
Streets around the pit head were South Row, Middle Row, North Row, New Row. And the earlier ones of Double Row and Sinkers Row ( where the shaft sinkers would have lived while sinking it, before moving on to do the next pit)
Info on ownership from Durham Mining Museum web site.
Michael