Cika wannan jumlar: Ma'adinai na kwal a Rhondda ya ci gaba da fadada a farkon karni na 20, ko da yake ba a sake haƙa ma'adinai a Porth ba. Yawan jama'a ya ci gaba da girma amma yanayi ya zama da wuya bayan Babban Mawuyacin hali, kuma a tsakiyar shekarun 1920 rashin aikin yi a tsakanin ma'aikatan ma'adinai ya tashi. Abubuwa sun kara tabarbarewa bayan bala'in
Janar yajin aiki na 1926 wanda ya ga masu hakar ma'adinai da yawa ba su da aiki na tsawon watanni. Kamar yadda aikin injiniya ya ba da damar sauran yankunan hakar ma'adinai su zama mafi riba, tsoffin ma'adinan Rhondda da aka nutsar da su kusan shekaru 75 da suka gabata ba su iya sabuntawa ba kuma daya bayan daya sun fara rufewa. Porth, kamar sauran Rhondda, an gina shi ne kawai a kusa da masana'antar kwal, kuma tare da rushewar ta ya zo da rashin aikin yi, wanda ya haifar da ƙauracewar tattalin arziki. Akwai ɗan gajeren hutu a lokacin Yaƙin Duniya na Biyu, lokacin da aikin ya ƙaru sosai. Wannan ya kasance wani ɓangare saboda buƙatar Rhondda steam coal, amma kuma saboda manyan masana'antun bindigogi da aka gina a Bridgend, Hirwaun da Treforest wanda ma'aikata suka yi aiki. Tare da ƙarshen yaƙin ya bayyana cewa rashin aikin yi zai dawo, amma don tabbatar da cewa sabbin ƙwarewar masana'antar da aka samu a cikin shekaru shida da suka gabata ba a rasa ba Gwamnatin Burtaniya ta zartar da Dokar Rarraba Masana'antu a shekarar 1945. Wannan ya ga sabbin masana'antu 25 sun zo Rhondda, shida daga cikinsu suna zaune a Porth. Sun kasance daga kamfanin yin akwatin Mista Jacob Beatus, masana'antar kayan wasan ƙarfe da reshe na Remploy da aka yi niyya ga ma'aikatan da ke da nakasa.