Hm, I'll try and answer. Hopefully that's answers that are asked for.
Mines are largely using manual labour, with only few largest ones getting conveyor belts installed to haul ores up to the surface. Western island's southern areas are still undeveloped, but are believed to have enough gemstones and precious metals to cover for higher overhead of a colder region.
Oil wells are still in really early developement due to low national demand for it.
Tarrell City Central Bank was installed by constitution in 1911, and is the only one allowed to carry out international transactions by 1915. Not sure on currency and its exchange rates at the time yet, but it'll probably be cheaper than most in the region, because of undeveloped market and recent independency.
Electricity and water supply are available to most major cities and towns, with plans to reach for every settlement and mine before 1920. Roads, still mostly made of cobblestone on the south, connect all of the towns, since cross-country railway is yet to be joined together (by 1915, only north of western island has dense railway coverage, with east mostly having 2 lines, joining together in the capital city). Main seaport is Dorjevei, near the narrowest point between 2 main islands (map coming soon-ish?), is being renewed to allow larger vessels in. Country capital has the only airport in Dalarian large enough to accept aircraft capable of getting to the continent, so for other destinations, and faster service of southern mines, dirigibles are widely used.
Telegraph lines connect with each other all of the centers of provinces. Radio communication between distant cities is being experimented with, and enjoys receiving large grants from the central government, compareable to ones for aviation and automobile development.
Is that all that's needed?