This was a four way junction. It was located on the Galston branch. To the west was the main line to Kilmarnock to the north west and goods line to Thirdpart Junction to the west. to the east were the Mayfield Branch to the north east and Galston line to the east.
The Mayfield branch opened with the Galston line. The original signal box opened in 1878. It was on the north side of the junction. To the south and east of the junction was Portland Pit Nos 6 and 7, approached from the junction.
In 1902 the Thirdpart Junction line was opened and the box was replaced, in a similar location. The new line made a double track connection to the Galston line. Loops were provided on the Mayfield branch closed to the junction (with a signal box at the north end of the yard, on the west side). Close to the junction a siding from the Portland Pit connected to the Thirdpart Junction line, allowing a train to leave the colliery without fouling the main Galston line.
The Thirdpart Junction line was closed in 1938. The signal box closed in 1958, replaced with a ground frame. By this date only the Hurlford Fireclay Works remained open on the Mayfield branch, which had been cut back.
The Galston branch closed in 1964 and the fireclay works siding closed in 1965, the line being cut back to the Hurlford Mineral Sidings.
The location is now a footpath.
Nearby stations Barleith Halt Hurlford Riccarton and Craigie Kilmarnock (St Marnocks) Kilmarnock Kilmarnock [1st] Galston Gatehead Crosshouse Kilmaurs Mossgiel Tunnel Platform Newmilns Springside Drybridge Mauchline | Portland Pit Nos 6 and 7 Hurlford Sidings Baltic Coal Pit Hurlford Shed J. Walker Hurlford Fireclay Works Defiance Coal Pit Cessnock Water Viaduct [North] Dykehead Coal Pit Dykehead Pit Siding Barleith Pit No 2 Barleith Pit No 1 Portland Pit No 5 and 8 Tourist/other Barleith Signal Box Bowhouse Signal Box |
Location names in dark blue are on the same original line. |
/ /1902 | Thirdpart Junction to Mayfield Junction (Glasgow and South Western Railway) Thirdpart Junction (Kilmarnock and Troon Railway) to Mayfield Junction (Galston Branch (Glasgow and South Western Railway)) opened to goods and minerals. |
/ /1938 | Thirdpart Junction to Mayfield Junction (Glasgow and South Western Railway) Thirdpart Junction (excluded) to Riccarton and Craigie (excluded) closed. Bellfield Junction (excluded) to Mayfield Junction (excluded) closed. |
06/07/1964 | Darvel Branch (Glasgow and South Western Railway) Darvel to Mayfield Junction (excluded) closed to freight. |
06/07/1964 | Galston Branch (Glasgow and South Western Railway) Darvel Branch (Glasgow and South Western Railway) Darvel to Mayfield Junction (excluded) closed. |
20/09/1965 | Mayfield Branch (Glasgow and South Western Railway)
Galston Branch (Glasgow and South Western Railway) Mayfield Branch and Mayfield Junction to Hurlford Mineral Sidings (excluded) closed to freight. |