LOT D-4B LOUISE DRIVE 3 STORY, 90 ROOM HOTEL UPPER ALLEN TOWNSHIP, CUMBERLAND COUNTY, PENNSYLVANIA

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1 FINAL LAND DEVELOPMENT PLAN LOT D-4B LOUISE DRIVE, CUMBERLAND COUNTY, PENNSYLVANIA N UTILITY INMATION OWNERS' ACKNOWLEDGMENT GENERAL NOTES ENGINEER LOCATION MAP PROPERTY OWNER INMATION SUBJECT PROPERTY SOURCE OF TITLE STORMWATER MANAGEMENT FACILITIES OPERATION AND MAINTENANCE PROGRAM PLAN PREPARER PLAN SHEET INDEX DEFERRAL OF REQUIREMENTS ZONING DATA COVER SHEET AND NOTES OFF-STREET PARKING DATA

2 BUSINESS PROFESSIONAL OFFICE ZONING DISTRICT CLARK STREET SOIL TYPE LEGEND LEGEND SOIL TEST LEGEND LOWER ALLEN TOWNSHIP CONCRETE MONUMENT (BPO) BUSINESS PROFESSIONAL OFFICE ZONING DISTRICT (R-2) MEDIUM DENSITY RESIDENTIAL ZONING DISTRICT EXISTING FEATURES

3 BUSINESS PROFESSIONAL OFFICE ZONING DISTRICT LEGEND CLARK STREET LABELED CURVES DRIVE ACCESS STOP SIGN LOWER ALLEN TOWNSHIP PENNDOT TYPE B SIGN INSTALLATION NO PARKING SIGN (BPO) BUSINESS PROFESSIONAL OFFICE ZONING DISTRICT PAVEMENT JOINT WITH CUTBACK INTO EXISTING PAVEMENT MATERIALS (R-2) MEDIUM DENSITY RESIDENTIAL ZONING DISTRICT GEOMETRY PLAN BITUMINOUS PAVEMENT SECTION TYPICAL HANDICAP PARKING SPACES

4 BUSINESS PROFESSIONAL OFFICE ZONING DISTRICT CLARK STREET LEGEND DRIVE LEVELING RINGS AND BOLTED FRAME ACCESS LOWER ALLEN TOWNSHIP (BPO) BUSINESS PROFESSIONAL OFFICE ZONING DISTRICT (R-2) MEDIUM DENSITY RESIDENTIAL ZONING DISTRICT GRADING & UTILITY PLAN STANDARD INLET BOX BASE UNIT TYPICAL PIPE END SECTION

5 I-8 TO I-12 CENTER LINE PROFILE SWALE 1 CENTER LINE PROFILE ACCESS DRIVE CENTER LINE PROFILE I-5 TO I-6 CENTER LINE PROFILE PROJECT PROFILES SANITARY SEWER LATERAL PROFILE BASIN OUTLET CULVERT CENTER LINE PROFILE TRENCH DRAIN/ACCESS DRIVE CULVERT CENTER LINE PROFILE

6 UPPER ALLEN TWP. SAN I TARY S E W E R PRECAST CONCRETE STANDARD TYPE C INLET TOP UNIT DEPRESSED VERTICAL CURB I-3 TO ES-2A CENTER LINE PROFILE PLAIN CEMENT CONCRETE VERTICAL CURB END TREATMENT PLAIN CEMENT CONCRETE VERTICAL CURB TYPE 4 INLET BOX BASE UNIT STORMWATER MANAGEMENT BASIN SUBSURFACE INFILTRATION BED TRENCH DRAIN

7 RUNOFF INFILTRATION SYSTEM C BUILDING SEWER DETAIL CONCRETE ENCASEMENT DETAIL TYPICAL PARKING SPACE DIMENSION SCHEDULE PROPOSED LIGHT STANDARD STORM SEWER CLEANOUT RUNOFF INFILTRATION BEDS A & B PROJECT DETAILS CEDAR DUMPSTER ENCLOSURE STORMWATER BASIN PERMANENT OUTLET STRUCTURE STORMWATER BASIN PERMANENT OUTLET STRUCTURE ORIFICE PLATE

8 CLARK STREET LEGEND PLANT SCHEDULE ACCESS DRIVE BALL & BURLAP EVERGREEN TREE PLANTING LOWER ALLEN TOWNSHIP MINIMUM STANDARDS THE QUALITY AND MAINTENANCE OF PLANT MATERIAL TREES PLANTED POST-CONSTRUCTION STORMWATER MANAGEMENT PLAN BMPs BALL & BURLAP DECIDUOUS TREE PLANTING SITE LIGHTING INMATION PERMANENT SEEDING SCHEDULE TEMPORARY SEEDING SCHEDULE BALL AND BURLAP SHRUB PLANTING

9 CLARK STREET SOIL TYPE LEGEND LEGEND ACCESS DRIVE SOIL LIMITATIONS AND RESOLUTIONS

10 NORTH AMERICAN GREEN STAPLE PATTERN 'C' NORTH AMERICAN GREEN STAPLE PATTERN 'E' GRASS-LINED BASIN SPILLWAY STANDARD CONSTRUCTION DETAIL #10 SEDIMENT BASIN OR SEDIMENT TRAP STANDARD CONSTRUCTION DETAIL #7 PLYWOOD BOXES AND TRASH RACKS PERMANENT STRUCTURES CONCRETE ANTI-SEEP COLLAR STANDARD CONSTRUCTION DETAIL #16 ROCK CONSTRUCTION ENTRANCE ) CLAY CORE DIMENSION SCHEDULE STANDARD CONSTRUCTION DETAIL #9 BAFFLES BASIN BERM SECTION WITH CLAY CORE TURF REINCEMENT MAT (TRM) SPECIFICATIONS STANDARD CONSTRUCTION DETAIL #33 RIPRAP APRONS AT PIPE OUTLETS WITH FLARED END SECTIONS ROLLED EROSION CONTROL PRODUCT (RECP) SPECIFICATIONS NORTH AMERICAN GREEN EROSION CONTROL BLANKET IN-CHANNEL INSTALLATION DETAIL STANDARD CONSTRUCTION DETAIL #22 SUPER FILTER FABRIC FENCE R.E.C.P. INSTALLATION SCHEDULE B. 3A STANDARD CONSTRUCTION DETAIL #13 DRY BARREL OR RISER SEDIMENT TRAPS E & S CONTROL DETAILS NORTH AMERICAN GREEN EROSION CONTROL BLANKET ON-SLOPE INSTALLATION DETAIL STANDARD CONSTRUCTION DETAIL #19 STANDARD FILTER FABRIC FENCE (18" HIGH) STANDARD CONSTRUCTION DETAIL #28 FILTER BAG INLET PROTECTION ON A CURBED ROADWAY STANDARD CONSTRUCTION DETAIL #1 VEGETATED CHANNELS

11 CONCRETE WASHOUT ANY PROJECT ON WHICH CONCRETE WILL BE POURED OR OTHERWISE MED ON SITE, A SUITABLE WASHOUT FACILITY MUST BE PROVIDED THE CLEANING OF CHUTES, MIXERS, AND HOPPERS OF THE DELIVERY VEHICLES UNLESS SUCH A FACILITY WILL BE USED AT THE SOURCE OF THE CONCRETE. UNDER NO CIRCUMSTANCES MAY WASH WATER FROM THESE VEHICLES BE ALLOWED TO ENTER ANY SURFACE WATERS. MAKE SURE THAT PROPER SIGNAGE IS PROVIDED TO DRIVERS SO THAT THEY ARE AWARE OF THE PRESENCE OF WASHOUT FACILITIES. WASHOUT FACILITIES SHOULD NOT BE PLACED WITHIN 50 FEET OF STORM DRAINS, OPEN DITCHES OR SURFACE WATERS. THEY SHOULD BE IN A CONVENIENT LOCATION THE TRUCKS, PREFERABLY NEAR THE PLACE WHERE THE CONCRETE IS BEING POURED, BUT FAR ENOUGH FROM OTHER VEHICULAR TRAFFIC TO MINIMIZE THE POTENTIAL ACCIDENTAL DAMAGE OR SPILLS. WHEREVER POSSIBLE, THEY SHOULD BE LOCATED ON SLOPES NOT EXCEEDING A 2% GRADE. ADDITIONAL INMATION ON WASHOUTS MAY BE OBTAINED FROM EPA'S STORMWATER WEBSITE AT: MENUOFBMPS/ INDEX.CFM?ACTION=BROWSE&RBUTTON=DETAIL&BMP=117&MINMEASURE=4. COMPOST SOCK WASHOUT WHEREVER COMPOST SOCK WASHOUTS ARE USED, A SUITABLE IMPERVIOUS GEOMEMBRANE SHOULD BE PLACED AT THE LOCATION OF THE WASHOUT. COMPOST SOCKS SHOULD BE STAKED IN THE MANNER RECOMMENDED BY THE MANUFACTURER AROUND PERIMETER OF THE GEOMEMBRANE SO AS TO M A RING WITH THE ENDS OF THE SOCK LOCATED AT THE UPSLOPE CORNER (FIGURE 3.18). CARE SHOULD BE TAKEN TO ENSURE CONTINUOUS CONTACT OF THE SOCK WITH THE GEOMEMBRANE AT ALL LOCATIONS. WHERE NECESSARY, SOCKS MAY BE STACKED AND STAKED SO AS TO M A TRIANGULAR CROSS-SECTION. PREFABRICATED WASHOUT CONTAINERS CARE SHOULD BE TAKEN TO ENSURE THAT THE CONTAINERS ARE INTENDED BY THE MANUFACTURER USE AS CONCRETE WASHOUT BMPS, THAT THEY ARE WATERTIGHT, AND APPROPRIATELY SIZED. ACCUMULATED MATERIALS MUST BE PROPERLY DISPOSED OF (PREFERABLY RECYCLED) WHEN THEY REACH THE CLEANOUT LEVEL. SELF-INSTALLED WASHOUTS THESE TYPES OF WASHOUTS SHOULD BE EXCAVATED BELOW GRADE TO PREVENT RUNOFF OF THE WASH WATER AND MINIMIZE THE POTENTIAL BREACHING. THEY SHOULD BE SIZED TO HANDLE SOLIDS, WASH WATER, AND RAINFALL. A GOOD RULE OF THUMB IS THAT 7 GALLONS OF WASH WATER ARE REQUIRED TO WASH ONE TRUCK CHUTE AND 50 GALLONS THE HOPPER OF A CONCRETE PUMP TRUCK. LARGER SITES, A BELOW-GRADE WASHOUT SHOULD BE A MINIMUM OF 10 FEET WIDE AND PROVIDE AT LEAST 12 INCHES OF FREEBOARD ABOVE THE LIQUID AND SOLID WASTE ANTICIPATED BETWEEN CLEANOUT INTERVALS. THE PIT SHOULD BE LINED WITH PLASTIC SHEETING OF AT LEAST 10-MIL THICKNESS (WITH NO HOLES OR TEARS) TO PREVENT LEACHING OF LIQUIDS INTO THE GROUND. WASHWATER RECYLING SYSTEMS WASHWATER RECYCLING SYSTEMS HAVE ALSO BEEN DEVELOPED WHICH SEPARATE THE SOLIDS FROM THE WASHWATER, CAPTURING BOTH IN IMPERMEABLE BAGS AND ALLOWING THEM TO BE RECYCLED. THESE SYSTEMS MAY BE USED IN LIEU OF WASHOUTS IF MANUFACTURERS' SPECIFICATIONS ARE FOLLOWED. CARE MUST BE TAKEN TO PREVENT THE FILTERED WATER FROM ENTERING ANY SURFACE WATERS. SEDIMENT BASINS AND SEDIMENT TRAPS SEDIMENT BASINS AND SEDIMENT TRAPS MAY NOT BE USED AS CONCRETE WASHOUT DEVICES, SINCE THEY DISCHARGE DIRECTLY TO SURFACE WATERS. THIS DISCHARGE WOULD HAVE AN ADVERSE EFFECT UPON THE RECEIVING WATER. IN ADDITION, CONTINUED USE OF A BASIN OR TRAP AS A WASHOUT FACILITY WOULD SIGNIFICANTLY REDUCE THE STORAGE CAPACITY OF THE BASIN OR TRAP. MAINTENANCE ALL CONCRETE WASHOUT FACILITIES SHOULD BE INSPECTED DAILY. DAMAGED OR LEAKING WASHOUTS SHOULD BE DEACTIVATED AND REPAIRED OR REPLACED IMMEDIATELY. ACCUMULATED MATERIALS SHOULD BE REMOVED WHEN THEY REACH 75% CAPACITY. PLASTIC LINERS SHOULD BE REPLACED WITH EACH CLEANING OF THE WASHOUT FACILITY. SINKHOLE REPAIR SINKHOLES VARY GREATLY IN SIZE AND NATURE. THEREE, SPECIFIC METHODS OF REPAIRING SINKHOLES WILL DEPEND ON SITE CONDITIONS INCLUDING BUT NOT NECESSARILY LIMITED TO: SINKHOLE DIAMETER AND DEPTH SURFACE SLOPE PRESENCE OR ABSENCE OF SURFACE RUNOFF SOIL TYPE CONNECTIVITY TO PUBLIC OR PRIVATE WATER SUPPLIES PROXIMITY OF SURFACE WATERS EASE OF ACCESS BY CONSTRUCTION EQUIPMENT POTENTIAL DANGER TO THE PUBLIC OR DAMAGE TO STRUCTURES DUE TO THE VARIABLE NATURE OF SINKHOLES, THEY SHOULD BE REPAIRED UNDER THE DIRECT OBSERVATION AND SUPERVISION OF A PROFESSIONAL GEOLOGIST OR LICENSED GEOTECHNICAL ENGINEER. FIGURES 17.1 THROUGH 17.4 ARE PROVIDED AS GENERAL GUIDELINES THE REPAIR OF SINKHOLES. THEY MAY BE MODIFIED AS NECESSARY TO ACCOMMODATE SPECIFIC SITE CONDITIONS. SITE SPECIFIC SINKHOLE REPAIR PLANS WILL BE REVIEWED ON A CASE-BY-CASE BASIS. EXCAVATE SIDES AND THROAT TO STABLE GROUND EXISTING GRADE SECTION 4" MIN. TOPSOIL (MOUNDED) SEED AND MULCH Figure 17.1, ES Program Manual 2012_ SINKHOLE REPAIR WITH A BENTONITE CAP NOT TO SCALE 8" THICK CLAY/ BENTONITE CAP CLAY BACKFILL COMPACTED IN 8" LIFTS 12" TO 18" THICK No 6 12" O.C. BOTH WAYS CLASS A CONCRETE AASHTO No 1 AGGREGATE WITH CLASS C CONCRETE (MAY USE LARGER STONE TO CLOG THE THROAT) LOOSE MATERIAL SHALL BE EXCAVATED FROM THE SINKHOLE AND EXPOSE SOLUTION VOID(S) IF POSSIBLE. ENLARGE SINKHOLE IF NECESSARY TO ALLOW INSTALLATION OF FILTER MATERIALS. OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION (OSHA) REGULATIONS MUST BE FOLLOWED AT ALL TIMES DURING EXCAVATION. STONES USED THE "BRIDGE" AND FILTERS SHALL HAVE A MODERATELY HARD ROCK STRENGTH AND BE RESISTANT TO ABRASION AND DEGRADATION. SHALE AND SIMILAR SOFT AND/OR NON-DURABLE ROCK ARE NOT ACCEPTABLE. FIELD STONE BRIDGE SECTION LOOSE MATERIAL SHALL BE EXCAVATED FROM THE SINKHOLE AND EXPOSE SOLUTION VOID(S) IF POSSIBLE. ENLARGE SINKHOLE IF NECESSARY TO ALLOW INSTALLATION OF FILTER MATERIALS. OSHA REGULATIONS MUST BE FOLLOWED AT ALL TIMES DURING EXCAVATION. SELECT FIELD STONE(S) ABOUT 1.5 TIMES LARGER THAN SOLUTION VOID(S) TO M "BRIDGE." PLACE ROCK(S) SO NO LARGE OPENINGS EXIST ALONG THE SIDES. STONES USED THE "BRIDGE" AND FILTERS SHALL HAVE A MODERATELY HARD ROCK STRENGTH AND BE RESISTANT TO ABRASION AND DEGRADATION. SHALE AND SIMILAR SOFT AND/OR NON-DURABLE ROCK ARE NOT ACCEPTABLE. MINIMUM THICKNESS OF R-3 ROCK IS 18." AASHTO #57 STONE THICKNESS SHALL BE A MINIMUM OF 9" THICK. MINIMUM THICKNESS OF TYPE A SAND SHALL BE 9". NOTE: A NON-WOVEN GEOTEXTILE WITH A BURST STRENGTH BETWEEN 100 AND 200 PSI MAY BE SUBSTITUTED THE AASHTO#57 STONE AND TYPE A SAND. SOIL SHALL BE MINERAL SOIL WITH AT LEAST 12 % FINES AND OVERFILLED BY 5% TO ALLOW SETTLEMENT. SUITABLE SOIL FROM THE EXCAVATION MAY BE USED. ANY AVAILABLE TOPSOIL SHALL BE PLACED ON TOP SURFACE. Figure 17.4, ES Program Manual 2012_ SINKHOLE REPAIR WITH A SOIL COVER NOT TO SCALE SOIL MATERIAL 9" OF FILTER MATERIAL (TYPE A SAND) 9" OF FILTER MATERIAL (AASHTO No 57 STONE) 18" OF FILTER MATERIAL (R-3 ROCK) GEOLOGY AND POLLUTION PREVENTION TOTAL DEPTH, D 2" X 2" X 36" WOODEN STAKES PLACED 5' O.C. MAXIMUM DEPTH OF CONCRETE WASHOUT WATER IS 50% OF FILTER RING HEIGHT 24" DIAMETER COMPOST FILTER SOCK GEOTEXTILE BETWEEN R-3 ROCK & AASHTO No 57 STONE 6" TO 12" TOPSOIL 12" MIN. SECTION 1/4 D FILTER MATERIAL (AASHTO No 57 STONE) 2" X 2" X 36" WOODEN STAKES PLACED 5' O.C. DIRECT CONCRETE WASHOUT WATER INTO FILTER RING 24" DIAMETER COMPOST FILTER SOCK. 4' MIN. OVERLAP ON UPSLOPE SIDE OF FILTER RING 1' ABOVE COMPETENT ROCK GEOTEXTILE BLANKET IN AREAS ADJACENT TO FINE GRAIN MATERIAL 3/4 D FILTER MATERIAL (R-3 ROCK) STONES 1/4 TO 1/2 VOID DIA. PLAN A SUITABLE IMPERVIOUS GEOMEMBRANE SHALL BE PLACED AT THE LOCATION OF THE WASHOUT PRIOR TO INSTALLING THE SOCKS. INSTALL ON FLAT GRADE OPTIMUM PERMANCE. 18" DIAMETER FILTER SOCK MAY BE STACKED ONTO DOUBLE 24" DIAMETER SOCKS IN PYRAMIDAL CONFIGURATION ADDED HEIGHT. Figure 3.18, ES Program Manual 2012_ TYPICAL COMPOST SOCK WASHOUT INSTALLATION NOT TO SCALE WASTE MANAGEMENT BUILDING MATERIALS AND OTHER CONSTRUCTION SITE WASTES MUST BE PROPERLY MANAGED AND DISPOSED OF TO REDUCE POTENTIAL POLLUTION TO SURFACE AND GROUND WATERS. NO BUILDING MATERIALS OR WASTES OR UNUSED BUILDING MATERIALS SHALL BE BURNED, BURIED, DUMPED, OR DISCHARGED AT THE SITE. UNDER NO CIRCUMSTANCES MAY EROSION CONTROL BMPS OR STORMWATER MANAGEMENT BMPS BE USED TEMPORARY STORAGE OF DEMOLITION MATERIALS OR CONSTRUCTION WASTES. PROCEDURES WHICH ENSURE THAT THE PROPER MEASURES THE RECYCLING OR DISPOSAL OF MATERIALS ASSOCIATED WITH OR FROM THE PROJECT SITE SHALL BE UNDERTAKEN IN ACCORDANCE WITH DEPARTMENT REGULATIONS. INDIVIDUALS RESPONSIBLE EARTH DISTURBANCE ACTIVITIES MUST ENSURE THAT PROPER MECHANISMS ARE IN PLACE TO CONTROL WASTE MATERIALS. CONSTRUCTION WASTES INCLUDE, BUT ARE NOT LIMITED TO, EXCESS SOIL MATERIALS, BUILDING MATERIALS, CONCRETE WASH WATER, SANITARY WASTES, ETC. THAT COULD ADVERSELY IMPACT WATER QUALITY. MEASURES SHOULD BE PLANNED AND IMPLEMENTED HOUSEKEEPING, MATERIALS MANAGEMENT, AND LITTER CONTROL. WHEREVER POSSIBLE, RECYCLING OF EXCESS MATERIALS IS PREFERRED, RATHER THAN DISPOSAL; RECYCLING OF WASTE MATERIALS, WHERE FEASIBLE, SHOULD BE PERMED ALL WASTE MATERIALS, SCRAP, OR EXCESS CONSTRUCTION AND/OR BUILDING MATERIALS AND WASTES SHALL BE COLLECTED, STORED, AND RECYCLED OR DISPOSED OF IN ACCORDANCE WITH THE SOLID WASTE MANAGEMENT ACT (35 P. S THE MUNICIPAL WASTE PLANNING, RECYCLING AND WASTE REDUCTION ACT (53 P. S ), THE CLEAN STREAMS LAW (35 P. S ) AND RELATED RULES AND REGULATIONS. (TITLE 25, CHAPTER 105, SECTION 46A), THE PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL PROTECTION REGULATIONS AT 25 PA CODE ET SEQ., 271.1, AND ET. SEQ., AND 25 PA. CODE 102.4(B)(5)(XI). WHEREVER HEAVY EQUIPMENT WILL BE USED DURING CONSTRUCTION OF THE CUTS AND FILLS OR PROPOSED BUILDINGS, A POLLUTION PREVENTION AND CONTINGENCY (PPC) PLAN MUST BE AVAILABLE ON SITE. THIS PLAN DOES NOT HAVE TO BE INCLUDED IN THE PERMIT APPLICATION PACKAGE SUBMITTED AN NPDES CONSTRUCTION PERMIT IN PENNSYLVANIA BUT SHOULD BE AVAILABLE ON THE PROJECT SITE. THE APPLICANT MUST PREPARE AND IMPLEMENT A PPC PLAN WHEN STORING, USING OR TRANSPORTING MATERIALS INCLUDING: FUELS, CHEMICALS, SOLVENTS, PESTICIDES, FERTILIZERS, LIME, PETROCHEMICALS, WASTEWATER, WASH WATER, CORE DRILLING WASTEWATER, CEMENT, SANITARY WASTES, SOLID WASTES, OR HAZARDOUS MATERIALS ONTO, ON, OR FROM THE PROJECT SITE DURING EARTH DISTURBANCE ACTIVITIES. THE PPC PLAN MUST BE AVAILABLE UPON REQUEST BY THE DEPARTMENT OR CONSERVATION DISTRICT. GUIDANCE DEVELOPMENT OF A PPC PLAN CAN BE FOUND IN "GUIDELINES THE DEVELOPMENT AND IMPLEMENTATION OF ENVIRONMENTAL EMERGENCY RESPONSE PLANS" (DOCUMENT # ), WHICH CAN BE FOUND IN THE DEPARTMENT'S ELIBRARY AT ALL APPLICABLE FEDERAL, STATE, AND LOCAL LAWS AND REGULATIONS MUST BE FOLLOWED IN THE USE, HANDLING, AND DISPOSAL OF POTENTIALLY HAZARDOUS MATERIALS. SHOULD SPILLAGE OR MISUSE OF REGULATED MATERIALS RESULT IN CONTAMINATION OF SOIL, CONTACT THE CUMBERLAND COUNTY CONSERVATION DISTRICT AND THE MUNICIPALCONTAMINATED SOIL SHALL BE DISPOSED OF AT EITHER A) AN APPROVED DISPOSAL FACILITY WITH AN APPROVED AND CURRENT PADEP SOIL WASTE MANAGEMENT PERMIT, OR B) AN APPROVED LANDFILL (TYPICALLY DISPOSAL AT A LANDFILL DOES NOT REQUIRE A WASTE PERMIT). SECTION LOOSE MATERIAL SHALL BE EXCAVATED FROM THE SINKHOLE AND EXPOSE SOLUTION VOID(S) IF POSSIBLE. ENLARGE SINKHOLE IF NECESSARY TO ALLOW INSTALLATION OF FILTER MATERIALS. OSHA REGULATIONS MUST BE FOLLOWED AT ALL TIMES DURING EXCAVATION. STONES USED THE "BRIDGE" AND FILTERS SHALL HAVE A MODERATELY HARD ROCK STRENGTH AND BE RESISTANT TO ABRASION AND DEGRADATION. SHALE AND SIMILAR SOFT AND/OR NON-DURABLE ROCK ARE NOT ACCEPTABLE. Figure 17.2, ES Program Manual 2012_ SINKHOLE REPAIR WITH A PERVIOUS COVER 12" MIN. 2', TYP. GEOTEXTILE ENVELOPE (WRAP ALL SIDES, BOTTOM & TOP) GEOTEXTILE TO KEEP FINES FROM SETTLING INTO AASHTO No 57 STONE BEDROCK NOT TO SCALE SECTION LOOSE MATERIAL SHALL BE EXCAVATED FROM THE SINKHOLE AND EXPOSE SOLUTION VOID(S) IF POSSIBLE. ENLARGE SINKHOLE IF NECESSARY TO ALLOW INSTALLATION OF FILTER MATERIALS. OSHA REGULATIONS MUST BE FOLLOWED AT ALL TIMES DURING EXCAVATION. GEOTEXTILE SHALL BE NON-WOVEN WITH A BURST STRENGTH BETWEEN 100 AND 200 PSI. SELECT FIELD STONE(S) ABOUT 1.5 TIMES LARGER THAN SOLUTION VOID(S) TO M "BRIDGE." PLACE ROCK(S) SO NO LARGE OPENINGS EXIST ALONG THE SIDES. STONES USED THE "BRIDGE" AND FILTERS SHALL HAVE A MODERATELY HARD ROCK STRENGTH AND BE RESISTANT TO ABRASION AND DEGRADATION. SHALE AND SIMILAR SOFT AND/OR NON-DURABLE ROCK ARE NOT ACCEPTABLE. MINIMUM THICKNESS OF R-4 ROCK IS 18." AASHTO #57 STONE THICKNESS SHALL BE ¼ TO ½ THAT OF THE R-4 ROCK. MINIMUM THICKNESS OF 2A MODIFIED CRUSHED STONE SHALL BE 9". AASHTO #57 STONE AND 2A MODIFIED CRUSHED STONE SHALL BE COMPACTED AFTER EACH PLACEMENT. COMPACTED CLAY SEAL SHALL BE A MINIMUM OF 12" THICK. CLAY SHALL BE PLACED IN 6" TO 9" LIFTS AND THOROUGHLY COMPACTED. CONCRETE CAP, WHICH IS OPTIONAL, SHALL BE A MINIMUM OF 8" THICK. USE 4,000 PSI CONCRETE WITH 6" X 6" - 6 GAUGE WELDED WIRE FABRIC, OR # 3 REBAR ON 18" O.C. BOTH WAYS. TOPSOIL SHALL BE A MINIMUM OF 12" THICK. GRADE POSITIVE DRAINAGE AWAY FROM SINKHOLE AREA. Figure 17.3, ES Program Manual 2012_ SINKHOLE REPAIR WITH AN IMPERVIOUS COVER NOT TO SCALE TOPSOIL CONCRETE CAP (OPTIONAL) COMPACTED CLAY 2A MODIFIED STONE EXCAVATE TO A STABLE SLOPE, AS PER OSHA STANDARDS AASHTO No 57 STONE R-4 ROCK BEDROCK CHOKE THROAT WITH LARGE ROCKS AND/OR CONCRETE CHUNKS (NOT INTENDED TO BE A WATERTIGHT SEAL) E & S CONTROL DETAILS