The coal industry of Maverick County is located along a section of the Olmos Coal Formation immediately north of Eagle Pass. Mining operations developed by Dolch at Dolchburg and by the Olmos Coal, Coke, and Oil Company at Olmos were the largest coal producers in Texas around the turn of the 20th century.
the cOal IndusTrY of maverick coUnTy IS LOcated alOnG a sectiOn Of The OlmoS cOaL FORMatiOn immeDiately NoRth of eagle pAss. minIng oPerAtiOns dEvElopeD BY dolCH at DOlchburG AND by The olMOS coal, cOke, And Oil COmPaNy aT oLMOS wEre The LarGesT cOAl producERS In tExas aRouNd the TUrn oF The 20tH CeNtury.