Abstract |
In the southeastern part of Missouri, the Clark National Forest straddles the Ozark Plateau and contains the headwaters of some of the most scenic rivers in the state. In 1955, rich mineral deposits were discovered in this area and by 1962 a rich lead-zinc ore belt was found to extend for approximately thirty-six miles almost due south from Viburnum, Missouri, through Iron and Reynolds Counties. The name given this new ore district was the Viburnum Trend or the 'New Lead Belt'. The report is concerned with the change of water quality and ecology of streams receiving the mining wastes. Heavy metal studies indicated that the range of values for copper, lead and zinc were from 1-20 ppb (parts per billion). The most frequently occurring values for all 3 elements were from 4-6 ppb. No significant changes in water quality were found for dissolved oxygen, alkalinity, hardness or stream temperature. Recommendations are presented for future stream pollution abatement in the 'New Lead Belt'. (WRSIC abstract) |