Priority AMD

Table 1 Summary of Average Discharge Characteristics
DISCHARGE	Flow gpm	pH	Net Acidity mg/L	Fe mg/L	Al mg/L	Mn mg/L	Fe Load kg/day	Acid Load kg/day
In-Stream Limits		6 - 9		1.5	0.75	1.0
Whiskey Run	170	4.4	72	20	0.9	0.8	18	66
Hope Hollow	250	5.3	123	58	1.7	0.8	163	347
Scrubgrass	170	6.1	-42	67	<0.5	0.6	63	-39
Woodville	120	6.2	-34	70	<0.5	0.9	47	-23
McLaughlin Run	230	5.4	112	66	3.7	0.8	84	142
Coal Run	910	6.6	-357	32	<0.5	0.5	158	-1767
Wingfield Pines	1500	6.7	-401	14	<0.5	0.3	114	-3278
Presto-Sygan	420	5.5	85	40	12.9	1.3	92	195
Gladden	1430	5.8	74	79	0.8	1.0	615	576
TOTAL	5470						1354	-3781

In aggregate the discharges are net alkaline, adding about 3,781 kg (8,500 lb)/day of alkalinity to Charters Creek. This explains why the main channel maintains a circumneutral pH of 8.0. Locally however, there are acidity problems in about 6 miles of tributaries below the points of discharges. These include the four miles of Millers Run, one mile of McLaughlin and about two miles of Whiskey and Georges Run (Hope Hollow). They add about 1354 kg of iron loading per day, or (3000lb)/day of pollutant discharge.

Table 2 Mine Drainage Summary
	Average Flow gpm	Low Flow gpm	High Flow gpm	Recharge Area acres	Average Flow/ Recharge Area gpm/acre
Whiskey Run	170	150	180	1080	0.16
Hope Hollow	520	450	600	2550	0.20
Scrubgrass/Woodville	290	240	400	4400	0.07
McLaughlin Run	230	160	300	1700	0.13
Coal Run	910	350	1210	N/A	N/A
Wingfield Pines	1500	1500	1500	1300	1.15
Presto-Sygan	420	175	775	3400	0.12
Gladden	1430	1075	3230	1600	0.89