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Slippery Rock Watershed Coalition
SR109 PASSIVE TREAMENT SYSTEM
FACT SHEET
PA Game Lands No. 95, Washington Township,
Butler County, PA
FUNDING SOURCE:
EPA 104(b)(3) Grant
PROJECT PARTICIPANTS:
| Puryear Excavating and Trucking |
PA Bureau of District Mining Operations
(Knox) |
| Bureau of Mining and Reclamation |
PA DEP Northwest Regional Office |
| PA Game Commission |
Butler County Conservation District |
| NRCS |
WPCAMR |
| PA Fish and Boat Commission |
Slippery Rock Watershed Coalition |
| Slippery Rock University |
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COMPLETION DATE:
Major construction completed August 1998
Water Quality Monitoring ongoing: PA DEP - Knox DMO
MATERIALS USED FOR TREATMENT:
166 yd3 of compost (1 foot layer)
450 tons of AASHTO No. 1 limestone (3 foot layer)
WATER COLLECTION AND DISTRIBUTION:
Collection: By check dam and rock lined channel.
Inlet: From the collection system, flow is distributed vertically down
through a 1 foot layer of compost and then continues down through a 3 foot layer
of AASHTO No. 1 limestone to the underdrain system consisting of 3 rows of
6" perforated Schedule 40 PVC connected to a 6" Schedule 40 PVC
manifold of the vertical flow system.
Outlet: Flow from the underdrain system rises vertically through 6"
Schedule 40 PVC pipes and is discharged to the retention pond/wetland. The
current elevation of the outlet of the pipes creates a 4 foot depth of water
above the top of the compost. Discharge from the retention pond/wetland is via a
rock lined channel to the stream.
SYSTEM DIMENSIONS (FEET):
| |
Length |
Width |
Depth |
| Vertical Flow System |
144 |
91 |
12 |
| Retention Pond |
70 |
40 |
5 |
| Wetland |
70 |
40 |
3 |
SOIL AMENDMENTS AND SEED MIXTURE:
Birdsfoot trefoil @ 10 lbs/ac; White Dutch clover @ 4 lbs/ac; Reed Canary Grass
@ 15 lbs/ac; Winter Wheat cover @ 120 lbs/ac, Aglime @ 10 tons/ac; 10-20-20
fertilizer; straw @ 3 tons/ac
WATER QUALITY (representative):
| |
Flow(gpm) |
pH |
alk(mg/l) |
acd(mg/l) |
Fe(mg/l) |
Al(mg/l) |
| Pre-construction: Raw |
14 |
4.9 |
9 |
14 |
3.1 |
0 |
| Post-construction: Final |
12 |
7.5 |
135 |
0 |
0 |
0 |
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