Lead 1978 Standard Nonattainment AreasAs of December 05, 2013
Detailed Description of Certain Area Boundaries for Partial Counties
East Helena Area (Lewis and Clark Co.), MT
Lewis And Clark Co
Northern boundary - Horizontal Universal Transverse Mercatur(UTM) 5,162,000 mN; eastern boundary - vertical UTM 432,500 mE; southern boundary - horizontal UTM 5,158,000 mN; western boundary - vertical UTM 427,000 mE.