20201549 Ver 1_Meeting Request Review_20201021

ID#* 20201549 Version* 1
Regional Office* Asheville Regional Office - [phone]
Reviewer List* Andrew Moore
Pre -Filing Meeting Request submitted 10/21/2020
.................................................................................................................................................................................................................................................................................................................................
Contact Name * Troy Beasley
Contact Email Address* [e-mail]
Project Name* Biltmore Forest - Greenwood Park Stream Restoration
Project Owner*
Project County*
Owner Address:
Town of Biltmore Forest
Buncombe
Street Address
355 Vanderbilt Road
Address Line 2
aty
Asheville
Postal / Zip Code
28803
Is this a transportation project?* r Yes r No
Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - F- 401 Water Quality Certification -
Regular Express
r- Individual Permit r- Modification
r- Shoreline Stabilization
Does this project have an existing project ID#?*
r Yes r No
State / Province / Region
NC
Country
USA
Do you know the name of the staff member you would like to request a meeting with?
Please give a brief project description below. *

The purpose of this Project is to restore the natural stream and improve
the riparian corridor functions of a firstlorder stream located in Greenwood
Park in the Town of Biltmore Forest. Urbanization of the watershed has
caused erosion of the banks, which was mitigated by installation of wire
gabion baskets in 1991. However, the baskets have reached the end of
their service life and erosion is occurring. The failing baskets also present
a safety hazard to the public, as the project is located in a public park
where access to the stream is readily available. The Project will restore
approximately 350 linear feet of a firstlorder unnamed tributary (UT) to the
Fourmile Branch and approximately 0.6 acres of the riparian corridor is
proposed. Urbanization of the approximate 0.3 square mile watershed and
impacts to the riparian corridor have degraded the stream.
The proposed restoration will include removal of approximately 570 linear
feet of existing wire gabion baskets and reuse of the rock and soil inside
the baskets to reshape the banks. Native trees and shrubs will be planted
to repair the riparian buffer, further stabilize the banks, and provide other
ecosystem services such as shading. In critical locations boulder toes, soil
lifts, or other bioengineered systems will be installed for additional
armoring. In approximately 3 locations, grade control measures will be
installed to provide for future watershed conditions and to establish pools.
This will establish a more natural stream bed, create the opportunity to
flush the fine sediments that have accumulated due to soil erosion through
the system, and prevent stream incision which is commonly observed in
many urban streams in North Carolina.
The project will be constructed using equipment that would be typical to
stream restorations such as tracked backhoes and dump trucks. Some
grading and filling will occur to create a more naturalized channel. Stream
flow may also be diverted (within the channel) during construction to
mitigate sedimentation impacts downstream if only banks will be impacted
that location, for example.
Please give a couple of dates you are available for a meeting.
11 /9/2020
11 /10/2020
11 /11 /2020
11 /12/2020
Please attach the documentation you would like to have the meeting about.
Greenwood Park Stream Restoration Plans.pdf 4.59MB
pdf only
By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
• This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
• I understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
• I also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.

Signature
� Odd
Submittal Date 10/21/2020
Reviewer Meeting Request Decision
Has a meeting been scheduled?* r Yes r No

DEVELOPER/OWNER60% CONSTRUCTION DRAWINGSGREENWOOD PARK STREAM RESTORATIONWR PROJECT NO.:09190430.00TOWN OF BILTMORE FOREST355 Vanderbilt RoadBiltmore Forest, North Carolina 28803Telephone: [phone]Attn: Mr. Jonathan Kanipe, Town ManagerEngineers | Planners | SurveyorsPREPARED BY:WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comCONSTRUCTION DRAWINGSGreenwood ParkStream RestorationTOWN OF BILTMORE FOREST, NORTH CAROLINASEPTEMBER 18, 202060% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONSITESITE¤2020 OPENSTREETMAP CONTRIBUTORSLOCATION MAPAPPROXIMATE SCALE 1" = 400'VICINITY MAPAPPROXIMATE SCALE 1" = 3000'¤2020 OPENSTREETMAP CONTRIBUTORSRSheet IndexSheetNumberSheet Title0.0Cover (This Sheet)0.1General Notes & Legend1.0Existing Conditions2.0Plan and Profile3.0Overall Landscape Plan3.1Landscape Plan (SW)3.2Landscape Plan (SE)3.3Landscape Plan (NE)4.0Stormwater Control Measure 1 Plan & Details4.1Stormwater Control Measure 2 Plan & Details4.2Stormwater Control Measure 3 Plan & Details4.3Stormwater Control Measures 4 & 5 Plan & Details5.0Stream Restoration Details5.1Stream Restoration Details5.2Erosion Control Details5.3Landscape Details5.4Landscape Details5.5Stormwater Management DetailsX-1 Cross SectionsSITE
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\09190430.00 Existing Conditions.dwg- Friday, September 18, 2020 5:23:42 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL249151.0EXISTING CONDITIONS60% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONGRAPHIC SCALE1 inch = 20 ft.20 0102040SOURCES:BOUNDARY DIGITIZED FROM BUNCOMBE COUNTY GIS DATA DATED SEPTEMBER 16, 2020.TOPOGRAPHIC SURVEY FROM FIELD SURVEY BY WITHERSRAVENEL DATED MARCH 2020.INVERT = 2133.93CONCRETE APRONINVERT = 2132.78EXISTING GABIONS42" GUM22" MAPLE22" MAPLE12" MAPLE17" MAPLE30" OAK8" PINE26" PINE11" PINE30" PINE23" PINE6" PINE20" PINE20" MAPLE28" OAK18" WHITE PINE24" WHITE PINEEXISTING GABIONEXISTING GABIONS23" MAPLE31" MAPLE26" MAPLE22" MAPLE22" MAPLE22" MAPLE30" MAPLE40" MAPLE30" GUM20" POPLAR10" PINE12" PINE11" PINE15" PINE30" PINE13" BIRCHEXISTING WOODENFOOTBRIDGE(TO BE REMOVED)EXISTINGWOODENSTAIRSEXISTING PLAY AREA(MULCHED)EXISTING PLAY AREA(MULCHED)EXISTINGBENCHINVERT 2131.66INVERT 2127.13INVERT 2126.52INVERT 2124.83INVERT 2123.77EXPOSEDWATER LINE2" CYPRESS13" CYPRESS8" CYPRESS
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\09190430.00 Plan & Profile.dwg- Friday, September 18, 2020 3:48:43 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL249152.0PLAN AND PROFILE60% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONGRAPHIC SCALE1 inch = 20 ft.20 010204055.155.1EXPOSED 10" DIP WATER MAIN
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\09190430.00 Landscape Plan.dwg- Friday, September 18, 2020 4:02:46 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL249153.0OVERALL LANDSCAPE PLAN60% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONGRAPHIC SCALE1 inch = 20 ft.20 010204042" GUM22" MAPLE22" MAPLE12" MAPLE17" MAPLE30" OAK8" PINE26" PINE11" PINE30" PINE23" PINE6" PINE20" PINE20" MAPLE28" OAK18" WHITE PINE24" WHITE PINE23" MAPLE31" MAPLE26" MAPLE22" MAPLE22" MAPLE22" MAPLE30" MAPLE40" MAPLE30" GUM20" POPLAR10" PINE12" PINE11" PINE15" PINE30" PINE13" BIRCH2" CYPRESS13" CYPRESS8" CYPRESSSTREAM GRADE CONTROLROCK VANESTREAM GRADE CONTROLROCK A-VANESTREAM GRADE CONTROLBOULDER STEP POOLSTREAM STABILIZATIONVEGETATED SOIL LIFTSTREAM STABILIZATIONBOULDER TOELEGENDNEW 2" CALIPER TREENEW SHRUBSPROPOSED STORMWATERCONTROL MEASURE(GRAVEL WETLAND)PROPOSED STORMWATERCONTROL MEASURE(SURFACE WATER INFILTRATION AREA)
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\SCM Plans and Details.dwg- Friday, September 18, 2020 5:43:32 PM - BALAZE, KATIESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL24915STORMWATER CONTROLMEASURE 1 PLAN &DETAILS4.02:13:1 TIE TO EXISTING3:1 TIE TO STREAM CROSS SECTION2:12:18" AMENDED SOILGRAVEL BOTTOMFOREBAYNORMAL POOLGRAVEL WETLAND GRADING DETAILNOT TO SCALEFOREBAY ENTRANCE TOBE GRADED DEEPER THANFOREBAY EXIT2:1(MIN)OUTLET WEIRFOREBAY BERMRIVER ROCKSCM 1GRAVEL WETLAND 1 PLANGRAVEL WETLAND STORMWATER CONTROL MEASURE (SCM) GENERAL NOTES:1. PRIOR TO OR DURING CONSTRUCTION, THE CONTRACTOR SHALL NOTIFY THEENGINEER OF ANY DISCREPANCIES IN THE PLANS OR SPECIFICATIONS.2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL,STATE (e.g. MINIMUM DESIGN CRITERIA), AND LOCAL STANDARDS ANDSPECIFICATIONS, HEREBY INCORPORATED BY REFERENCE.3. CONTRACTOR SHALL OBTAIN A COPY OF THE SITE GEOTECHNICAL REPORT. THEREPORT AND ITS RECOMMENDATION SHALL BE PART OF THE STANDARDS ANDSPECIFICATIONS FOR CONSTRUCTION OF THE SCM. UPON COMPLETION OFCONSTRUCTION, CERTIFICATION OF THE SCM BY THE GEOTECHNICAL ENGINEERWILL BE REQUIRED PRIOR TO FINAL SCM ACCEPTANCE.4. THE GEOTECHNICAL ENGINEER SHALL EVALUATE SOILS FOR SUITABILITY OF DAMCONSTRUCTION AND SLOPE STABILITY.5. PRIOR TO PLACEMENT OF EMBANKMENT FILL, THE GEOTECHNICAL ENGINEER WILLSUPERVISE THE FOUNDATION PREPARATION AND APPROVE THE DEPTH ANDEXTENT OF THE CUTOFF TRENCH.6. THE DAM AND FOREBAY BERMS SHALL BE CONSTRUCTED IN ACCORDANCE WITHTHE FOLLOWING SPECIFICATIONS UNLESS SUPERCEDED BY THE GEOTECHNICALENGINEER'S RECOMMENDATIONS.xBORROW MATERIALS FOR USE AS EMBANKMENT FILL SHALL BE FREE OFORGANICS, ROOTS AND OTHER WOODY VEGETATION OR ORGANIC DEBRIS.xFILL MATERIALS SHALL CONSIST OF SOILS WHICH CLASSIFY AS SC, SM, CL,CL-CH AND ML IN ACCORDANCE WITH THE UNIFIED CLASSIFICATION SYSTEM ORAS APPROVED BY THE GEOTECHNICAL ENGINEER.xFILL MATERIALS SHALL HAVE A MAXIMUM PARTICLE SIZE OF 3 INCHES IN MEANDIAMETER.xFILL SHALL BE PLACED IN 8 INCH (MAXIMUM) LOOSE LIFTS UNDER THESUPERVISION OF THE GEOTECHNICAL ENGINEER OR THEIR REPRESENTATIVE.FILL SHALL BE BROUGHT UP BY BENCHING INTO THE EXISTING SLOPE. AMAXIMUM HEIGHT OF 2 FEET SHALL BE USED FOR EACH BENCH LIFT TAKINGCARE TO REMOVE ROOT STRUCTURES AS THE FILL PROCEEDS. THE SURFACEOF EACH LIFT SHALL BE SCARIFIED PRIOR TO PLACEMENT OF THE NEXT LIFT INORDER TO EFFECTIVELY TIE THE FILL LIFTS TOGETHER.xALL COMPACTION SHALL BE TESTED BY THE SAND CONE METHOD (ASTM D-1566)OR NUCLEAR METHOD (ASTM D-6938) AT A RATE OF AT LEAST ONE TEST PER5,000 SF PER ONE FOOT OF COMPACTED FILL THICKNESS IN GENERAL AREAFILLS AND ONE TEST PER 50 LINEAL FEET PER LIFT ALONG THE BARREL.xTHE MINIMUM COMPACTION SHALL BE A MINIMUM OF 95% OF THE MAXIMUMSTANDARD PROCTOR DENSITY (ASTM D-698) AT MOISTURE CONTENTS VARYINGFROM 2 PERCENT BELOW TO 3 PERCENT ABOVE OPTIMUM MOISTURE CONTENTDETERMINED BY STANDARD PROCTOR TEST TO WITHIN 3 FEET OF THE FINALGRADE.7. PRIOR TO FINAL GRADING OF THE SCM, THE CONTRACTOR SHALL PROVIDESUFFICIENT AS-BUILT SURVEY INFORMATION TO CONFIRM THAT THE FINISHED SCMWILL MEET THE SPECIFIC DIMENSIONAL REQUIREMENTS APPLICABLE TO THE SCM.THOSE REQUIREMENTS INCLUDE:xGRAVEL BOTTOM ELEVATION = FTxMINIMUM SURFACE AREA AT NORMAL POOL ELEVATION = SFxWEIR CREST ELEVATION (NORMAL POOL) = FTxAVERAGE TOP OF EMBANKMENT (+/- 0.1 FT) = FT8. ELEVATIONS SHOULD BE WITHIN 0.1 FEET OF THE ABOVE ELEVATIONS FOREARTHWORK, AND 0.05 FEET FOR OUTLET STRUCTURE. ALL SURFACE AREAS ARETHE MINIMUMS AREAS. REQUEST FOR A REDUCTIONS IN THE MINIMUM VALUES WILLBE CONSIDERED ON A CASE BY CASE BASIS.9. FINAL CERTIFICATION OF THE SCM BY A PROFESSIONAL ENGINEER IS REQUIRED.PRECAST CONCRETE MATERIALS NOTES:1. ALL PRECAST CONCRETE STRUCTURES SHALL CONFORM TO ASTM C913(RECTANGULAR) OR C478 (ROUND).2. ALL REINFORCED CONCRETE PIPE SHALL CONFORM TO ASTM C76, CLASS III(UNLESS OTHERWISE NOTED),2.1. O-RING JOINTS (RGRCP) SHALL CONFORM TO ASTM C443 & ASTM C361.2.2. NON O-RING JOINTS (RCP) SHALL CONFORM TO ASTM C990ADDITIONAL REQUIREMENTS1. AN OPERATIONS AND MAINTENANCE MANUAL AND MAINTENANCE AGREEMENTSHALL BE PREPARED AND PROVIDED TO THE OWNER. ADDITIONAL REQUIREMENTS(e.g. RECORDATION OF EASEMENTS, AGREEMENTS, ETC.) MAY APPLY.WRP/KEB1 inch = 10 ft.10GRAPHIC SCALE051020SPLITTER BOX DETAILNTSINV. IN 2128.2518" CMP INTOP SLAB WITH GRATE ACCESSRIM: 2132.126" PVC INV: 2127.90 TO SCM 1WEIR OVERFLOW ELEVATIONTO SCM 14' x 4' PRECAST JUNCTION BOXMANHOLE STEPS 16" O.C.(POLYPROPYLENE ENCASED STEEL)(NCDOT STD. 840.66)18" CMP OUTKEBINV. OUT 2128.006" PVC TO SCM 160% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONSCM 1SCM 1 WEIR OUTLET
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\SCM Plans and Details.dwg- Friday, September 18, 2020 5:44:19 PM - BALAZE, KATIESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL24915STORMWATER CONTROLMEASURE 2 PLAN &DETAILS4.1SCM 2GRAVEL WETLAND 2 PLANBGBWRP/KB1 inch = 10 ft.10GRAPHIC SCALE05102060% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTION2:13:1 TIE TO EXISTING3:1 TIE TO STREAM CROSS SECTION2:12:18" AMENDED SOILGRAVEL BOTTOMFOREBAYNORMAL POOLGRAVEL WETLAND GRADING DETAILNOT TO SCALEFOREBAY ENTRANCE TOBE GRADED DEEPER THANFOREBAY EXIT2:1(MIN)OUTLET WEIRFOREBAY BERMRIVER ROCKGRAVEL WETLAND STORMWATER CONTROL MEASURE (SCM) GENERAL NOTES:1. PRIOR TO OR DURING CONSTRUCTION, THE CONTRACTOR SHALL NOTIFY THEENGINEER OF ANY DISCREPANCIES IN THE PLANS OR SPECIFICATIONS.2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL,STATE (e.g. MINIMUM DESIGN CRITERIA), AND LOCAL STANDARDS ANDSPECIFICATIONS, HEREBY INCORPORATED BY REFERENCE.3. CONTRACTOR SHALL OBTAIN A COPY OF THE SITE GEOTECHNICAL REPORT. THEREPORT AND ITS RECOMMENDATION SHALL BE PART OF THE STANDARDS ANDSPECIFICATIONS FOR CONSTRUCTION OF THE SCM. UPON COMPLETION OFCONSTRUCTION, CERTIFICATION OF THE SCM BY THE GEOTECHNICAL ENGINEERWILL BE REQUIRED PRIOR TO FINAL SCM ACCEPTANCE.4. THE GEOTECHNICAL ENGINEER SHALL EVALUATE SOILS FOR SUITABILITY OF DAMCONSTRUCTION AND SLOPE STABILITY.5. PRIOR TO PLACEMENT OF EMBANKMENT FILL, THE GEOTECHNICAL ENGINEER WILLSUPERVISE THE FOUNDATION PREPARATION AND APPROVE THE DEPTH ANDEXTENT OF THE CUTOFF TRENCH.6. THE DAM AND FOREBAY BERMS SHALL BE CONSTRUCTED IN ACCORDANCE WITHTHE FOLLOWING SPECIFICATIONS UNLESS SUPERCEDED BY THE GEOTECHNICALENGINEER'S RECOMMENDATIONS.xBORROW MATERIALS FOR USE AS EMBANKMENT FILL SHALL BE FREE OFORGANICS, ROOTS AND OTHER WOODY VEGETATION OR ORGANIC DEBRIS.xFILL MATERIALS SHALL CONSIST OF SOILS WHICH CLASSIFY AS SC, SM, CL,CL-CH AND ML IN ACCORDANCE WITH THE UNIFIED CLASSIFICATION SYSTEM ORAS APPROVED BY THE GEOTECHNICAL ENGINEER.xFILL MATERIALS SHALL HAVE A MAXIMUM PARTICLE SIZE OF 3 INCHES IN MEANDIAMETER.xFILL SHALL BE PLACED IN 8 INCH (MAXIMUM) LOOSE LIFTS UNDER THESUPERVISION OF THE GEOTECHNICAL ENGINEER OR THEIR REPRESENTATIVE.FILL SHALL BE BROUGHT UP BY BENCHING INTO THE EXISTING SLOPE. AMAXIMUM HEIGHT OF 2 FEET SHALL BE USED FOR EACH BENCH LIFT TAKINGCARE TO REMOVE ROOT STRUCTURES AS THE FILL PROCEEDS. THE SURFACEOF EACH LIFT SHALL BE SCARIFIED PRIOR TO PLACEMENT OF THE NEXT LIFT INORDER TO EFFECTIVELY TIE THE FILL LIFTS TOGETHER.xALL COMPACTION SHALL BE TESTED BY THE SAND CONE METHOD (ASTM D-1566)OR NUCLEAR METHOD (ASTM D-6938) AT A RATE OF AT LEAST ONE TEST PER5,000 SF PER ONE FOOT OF COMPACTED FILL THICKNESS IN GENERAL AREAFILLS AND ONE TEST PER 50 LINEAL FEET PER LIFT ALONG THE BARREL.xTHE MINIMUM COMPACTION SHALL BE A MINIMUM OF 95% OF THE MAXIMUMSTANDARD PROCTOR DENSITY (ASTM D-698) AT MOISTURE CONTENTS VARYINGFROM 2 PERCENT BELOW TO 3 PERCENT ABOVE OPTIMUM MOISTURE CONTENTDETERMINED BY STANDARD PROCTOR TEST TO WITHIN 3 FEET OF THE FINALGRADE.7. PRIOR TO FINAL GRADING OF THE SCM, THE CONTRACTOR SHALL PROVIDESUFFICIENT AS-BUILT SURVEY INFORMATION TO CONFIRM THAT THE FINISHED SCMWILL MEET THE SPECIFIC DIMENSIONAL REQUIREMENTS APPLICABLE TO THE SCM.THOSE REQUIREMENTS INCLUDE:xGRAVEL BOTTOM ELEVATION = FTxMINIMUM SURFACE AREA AT NORMAL POOL ELEVATION = SFxWEIR CREST ELEVATION (NORMAL POOL) = FTxAVERAGE TOP OF EMBANKMENT (+/- 0.1 FT) = FT8. ELEVATIONS SHOULD BE WITHIN 0.1 FEET OF THE ABOVE ELEVATIONS FOREARTHWORK, AND 0.05 FEET FOR OUTLET STRUCTURE. ALL SURFACE AREAS ARETHE MINIMUMS AREAS. REQUEST FOR A REDUCTIONS IN THE MINIMUM VALUES WILLBE CONSIDERED ON A CASE BY CASE BASIS.9. FINAL CERTIFICATION OF THE SCM BY A PROFESSIONAL ENGINEER IS REQUIRED.PRECAST CONCRETE MATERIALS NOTES:1. ALL PRECAST CONCRETE STRUCTURES SHALL CONFORM TO ASTM C913(RECTANGULAR) OR C478 (ROUND).2. ALL REINFORCED CONCRETE PIPE SHALL CONFORM TO ASTM C76, CLASS III(UNLESS OTHERWISE NOTED),2.1. O-RING JOINTS (RGRCP) SHALL CONFORM TO ASTM C443 & ASTM C361.2.2. NON O-RING JOINTS (RCP) SHALL CONFORM TO ASTM C990ADDITIONAL REQUIREMENTS1. AN OPERATIONS AND MAINTENANCE MANUAL AND MAINTENANCE AGREEMENTSHALL BE PREPARED AND PROVIDED TO THE OWNER. ADDITIONAL REQUIREMENTS(e.g. RECORDATION OF EASEMENTS, AGREEMENTS, ETC.) MAY APPLY.SPLITTER BOX DETAILNTSINV. IN: 2129.2515" HDPE INTOP SLAB WITH GRATE ACCESSRIM: 2131.996" PVC TO SCM 2 INV: 2128.80WEIR OVERFLOW ELEVATIONTO SCM 24' x 4' PRECAST JUNCTION BOXMANHOLE STEPS 16" O.C.(POLYPROPYLENE ENCASED STEEL)(NCDOT STD. 840.66)15" HDPE OUTINV. OUT: 2129.006" PVC TO SCM 2SCM 2SCM 2 WEIR OUTLET
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\SCM Plans and Details.dwg- Friday, September 18, 2020 5:52:58 PM - BALAZE, KATIESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL24915STORMWATER CONTROLMEASURE 3 PLAN &DETAILS4.2SCM 3GRAVEL WETLAND 3 PLANBGBWRP/KB1 inch = 10 ft.10GRAPHIC SCALE05102060% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTION2:13:1 TIE TO EXISTING3:1 TIE TO STREAM CROSS SECTION2:12:18" AMENDED SOILGRAVEL BOTTOMFOREBAYNORMAL POOLGRAVEL WETLAND GRADING DETAILNOT TO SCALEFOREBAY ENTRANCE TOBE GRADED DEEPER THANFOREBAY EXIT2:1(MIN)OUTLET WEIRFOREBAY BERMRIVER ROCKGRAVEL WETLAND STORMWATER CONTROL MEASURE (SCM) GENERAL NOTES:1. PRIOR TO OR DURING CONSTRUCTION, THE CONTRACTOR SHALL NOTIFY THEENGINEER OF ANY DISCREPANCIES IN THE PLANS OR SPECIFICATIONS.2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL,STATE (e.g. MINIMUM DESIGN CRITERIA), AND LOCAL STANDARDS ANDSPECIFICATIONS, HEREBY INCORPORATED BY REFERENCE.3. CONTRACTOR SHALL OBTAIN A COPY OF THE SITE GEOTECHNICAL REPORT. THEREPORT AND ITS RECOMMENDATION SHALL BE PART OF THE STANDARDS ANDSPECIFICATIONS FOR CONSTRUCTION OF THE SCM. UPON COMPLETION OFCONSTRUCTION, CERTIFICATION OF THE SCM BY THE GEOTECHNICAL ENGINEERWILL BE REQUIRED PRIOR TO FINAL SCM ACCEPTANCE.4. THE GEOTECHNICAL ENGINEER SHALL EVALUATE SOILS FOR SUITABILITY OF DAMCONSTRUCTION AND SLOPE STABILITY.5. PRIOR TO PLACEMENT OF EMBANKMENT FILL, THE GEOTECHNICAL ENGINEER WILLSUPERVISE THE FOUNDATION PREPARATION AND APPROVE THE DEPTH ANDEXTENT OF THE CUTOFF TRENCH.6. THE DAM AND FOREBAY BERMS SHALL BE CONSTRUCTED IN ACCORDANCE WITHTHE FOLLOWING SPECIFICATIONS UNLESS SUPERCEDED BY THE GEOTECHNICALENGINEER'S RECOMMENDATIONS.xBORROW MATERIALS FOR USE AS EMBANKMENT FILL SHALL BE FREE OFORGANICS, ROOTS AND OTHER WOODY VEGETATION OR ORGANIC DEBRIS.xFILL MATERIALS SHALL CONSIST OF SOILS WHICH CLASSIFY AS SC, SM, CL,CL-CH AND ML IN ACCORDANCE WITH THE UNIFIED CLASSIFICATION SYSTEM ORAS APPROVED BY THE GEOTECHNICAL ENGINEER.xFILL MATERIALS SHALL HAVE A MAXIMUM PARTICLE SIZE OF 3 INCHES IN MEANDIAMETER.xFILL SHALL BE PLACED IN 8 INCH (MAXIMUM) LOOSE LIFTS UNDER THESUPERVISION OF THE GEOTECHNICAL ENGINEER OR THEIR REPRESENTATIVE.FILL SHALL BE BROUGHT UP BY BENCHING INTO THE EXISTING SLOPE. AMAXIMUM HEIGHT OF 2 FEET SHALL BE USED FOR EACH BENCH LIFT TAKINGCARE TO REMOVE ROOT STRUCTURES AS THE FILL PROCEEDS. THE SURFACEOF EACH LIFT SHALL BE SCARIFIED PRIOR TO PLACEMENT OF THE NEXT LIFT INORDER TO EFFECTIVELY TIE THE FILL LIFTS TOGETHER.xALL COMPACTION SHALL BE TESTED BY THE SAND CONE METHOD (ASTM D-1566)OR NUCLEAR METHOD (ASTM D-6938) AT A RATE OF AT LEAST ONE TEST PER5,000 SF PER ONE FOOT OF COMPACTED FILL THICKNESS IN GENERAL AREAFILLS AND ONE TEST PER 50 LINEAL FEET PER LIFT ALONG THE BARREL.xTHE MINIMUM COMPACTION SHALL BE A MINIMUM OF 95% OF THE MAXIMUMSTANDARD PROCTOR DENSITY (ASTM D-698) AT MOISTURE CONTENTS VARYINGFROM 2 PERCENT BELOW TO 3 PERCENT ABOVE OPTIMUM MOISTURE CONTENTDETERMINED BY STANDARD PROCTOR TEST TO WITHIN 3 FEET OF THE FINALGRADE.7. PRIOR TO FINAL GRADING OF THE SCM, THE CONTRACTOR SHALL PROVIDESUFFICIENT AS-BUILT SURVEY INFORMATION TO CONFIRM THAT THE FINISHED SCMWILL MEET THE SPECIFIC DIMENSIONAL REQUIREMENTS APPLICABLE TO THE SCM.THOSE REQUIREMENTS INCLUDE:xGRAVEL BOTTOM ELEVATION = FTxMINIMUM SURFACE AREA AT NORMAL POOL ELEVATION = SFxWEIR CREST ELEVATION (NORMAL POOL) = FTxAVERAGE TOP OF EMBANKMENT (+/- 0.1 FT) = FT8. ELEVATIONS SHOULD BE WITHIN 0.1 FEET OF THE ABOVE ELEVATIONS FOREARTHWORK, AND 0.05 FEET FOR OUTLET STRUCTURE. ALL SURFACE AREAS ARETHE MINIMUMS AREAS. REQUEST FOR A REDUCTIONS IN THE MINIMUM VALUES WILLBE CONSIDERED ON A CASE BY CASE BASIS.9. FINAL CERTIFICATION OF THE SCM BY A PROFESSIONAL ENGINEER IS REQUIRED.PRECAST CONCRETE MATERIALS NOTES:1. ALL PRECAST CONCRETE STRUCTURES SHALL CONFORM TO ASTM C913(RECTANGULAR) OR C478 (ROUND).2. ALL REINFORCED CONCRETE PIPE SHALL CONFORM TO ASTM C76, CLASS III(UNLESS OTHERWISE NOTED),2.1. O-RING JOINTS (RGRCP) SHALL CONFORM TO ASTM C443 & ASTM C361.2.2. NON O-RING JOINTS (RCP) SHALL CONFORM TO ASTM C990ADDITIONAL REQUIREMENTS1. AN OPERATIONS AND MAINTENANCE MANUAL AND MAINTENANCE AGREEMENTSHALL BE PREPARED AND PROVIDED TO THE OWNER. ADDITIONAL REQUIREMENTS(e.g. RECORDATION OF EASEMENTS, AGREEMENTS, ETC.) MAY APPLY.SPLITTER BOX DETAILNTSINV. IN: 2135.7518" HDPE INTOP SLAB WITH GRATE ACCESSRIM: 2137.716" PVC TO SCM 3 INV: 2135.51WEIR OVERFLOW ELEVATIONTO SCM 34' x 4' PRECAST JUNCTION BOXMANHOLE STEPS 16" O.C.(POLYPROPYLENE ENCASED STEEL)(NCDOT STD. 840.66)18" HDPE OUTINV. OUT 2135.506" PVC TO SCM 3SCM 3SCM 3 WEIR OUTLET
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\SCM Plans and Details.dwg- Friday, September 18, 2020 5:45:05 PM - BALAZE, KATIESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL24915STORMWATER CONTROLMEASURES 4 & 5 PLAN &DETAILS4.3SCM 5INFILTRATION BASIN 2BGBWRP/KB1 inch = 10 ft.10GRAPHIC SCALE051020SCM 4INFILTRATION BASIN 11 inch = 10 ft.10GRAPHIC SCALE05102060% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONINFILTRATION BASIN STORMWATER CONTROL MEASURE (SCM) GENERAL NOTES:1. PRIOR TO OR DURING CONSTRUCTION, THE CONTRACTOR SHALL NOTIFY THEENGINEER OF ANY DISCREPANCIES IN THE PLANS OR SPECIFICATIONS.2. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH ALL APPLICABLE FEDERAL,STATE (e.g. MINIMUM DESIGN CRITERIA), AND LOCAL STANDARDS ANDSPECIFICATIONS, HEREBY INCORPORATED BY REFERENCE.3. CONTRACTOR SHALL OBTAIN A COPY OF THE SITE GEOTECHNICAL REPORT. THEREPORT AND ITS RECOMMENDATION SHALL BE PART OF THE STANDARDS ANDSPECIFICATIONS FOR CONSTRUCTION OF THE SCM. UPON COMPLETION OFCONSTRUCTION, CERTIFICATION OF THE SCM BY THE GEOTECHNICAL ENGINEERWILL BE REQUIRED PRIOR TO FINAL SCM ACCEPTANCE.4. THE GEOTECHNICAL ENGINEER SHALL EVALUATE SOILS FOR SUITABILITY OF DAMCONSTRUCTION AND SLOPE STABILITY.5. PRIOR TO PLACEMENT OF EMBANKMENT FILL, THE GEOTECHNICAL ENGINEER WILLSUPERVISE THE FOUNDATION PREPARATION AND APPROVE THE DEPTH ANDEXTENT OF THE CUTOFF TRENCH.6. THE DAM AND FOREBAY BERMS SHALL BE CONSTRUCTED IN ACCORDANCE WITHTHE FOLLOWING SPECIFICATIONS UNLESS SUPERCEDED BY THE GEOTECHNICALENGINEER'S RECOMMENDATIONS.xBORROW MATERIALS FOR USE AS EMBANKMENT FILL SHALL BE FREE OFORGANICS, ROOTS AND OTHER WOODY VEGETATION OR ORGANIC DEBRIS.xFILL MATERIALS SHALL CONSIST OF SOILS WHICH CLASSIFY AS SC, SM, CL,CL-CH AND ML IN ACCORDANCE WITH THE UNIFIED CLASSIFICATION SYSTEM ORAS APPROVED BY THE GEOTECHNICAL ENGINEER.xFILL MATERIALS SHALL HAVE A MAXIMUM PARTICLE SIZE OF 3 INCHES IN MEANDIAMETER.xFILL SHALL BE PLACED IN 8 INCH (MAXIMUM) LOOSE LIFTS UNDER THESUPERVISION OF THE GEOTECHNICAL ENGINEER OR THEIR REPRESENTATIVE.FILL SHALL BE BROUGHT UP BY BENCHING INTO THE EXISTING SLOPE. AMAXIMUM HEIGHT OF 2 FEET SHALL BE USED FOR EACH BENCH LIFT TAKINGCARE TO REMOVE ROOT STRUCTURES AS THE FILL PROCEEDS. THE SURFACEOF EACH LIFT SHALL BE SCARIFIED PRIOR TO PLACEMENT OF THE NEXT LIFT INORDER TO EFFECTIVELY TIE THE FILL LIFTS TOGETHER.xALL COMPACTION SHALL BE TESTED BY THE SAND CONE METHOD (ASTM D-1566)OR NUCLEAR METHOD (ASTM D-6938) AT A RATE OF AT LEAST ONE TEST PER5,000 SF PER ONE FOOT OF COMPACTED FILL THICKNESS IN GENERAL AREAFILLS AND ONE TEST PER 50 LINEAL FEET PER LIFT ALONG THE BARREL.xTHE MINIMUM COMPACTION SHALL BE A MINIMUM OF 95% OF THE MAXIMUMSTANDARD PROCTOR DENSITY (ASTM D-698) AT MOISTURE CONTENTS VARYINGFROM 2 PERCENT BELOW TO 3 PERCENT ABOVE OPTIMUM MOISTURE CONTENTDETERMINED BY STANDARD PROCTOR TEST TO WITHIN 3 FEET OF THE FINALGRADE.7. PRIOR TO FINAL GRADING OF THE SCM, THE CONTRACTOR SHALL PROVIDESUFFICIENT AS-BUILT SURVEY INFORMATION TO CONFIRM THAT THE FINISHED SCMWILL MEET THE SPECIFIC DIMENSIONAL REQUIREMENTS APPLICABLE TO THE SCM.THOSE REQUIREMENTS INCLUDE:xGRAVEL BOTTOM ELEVATION = FTxMINIMUM SURFACE AREA AT NORMAL POOL ELEVATION = SFxWEIR CREST ELEVATION (NORMAL POOL) = FTxAVERAGE TOP OF EMBANKMENT (+/- 0.1 FT) = FT8. ELEVATIONS SHOULD BE WITHIN 0.1 FEET OF THE ABOVE ELEVATIONS FOREARTHWORK, AND 0.05 FEET FOR OUTLET STRUCTURE. ALL SURFACE AREAS ARETHE MINIMUMS AREAS. REQUEST FOR A REDUCTIONS IN THE MINIMUM VALUES WILLBE CONSIDERED ON A CASE BY CASE BASIS.9. FINAL CERTIFICATION OF THE SCM BY A PROFESSIONAL ENGINEER IS REQUIRED.PRECAST CONCRETE MATERIALS NOTES:1. ALL PRECAST CONCRETE STRUCTURES SHALL CONFORM TO ASTM C913(RECTANGULAR) OR C478 (ROUND).2. ALL REINFORCED CONCRETE PIPE SHALL CONFORM TO ASTM C76, CLASS III(UNLESS OTHERWISE NOTED),2.1. O-RING JOINTS (RGRCP) SHALL CONFORM TO ASTM C443 & ASTM C361.2.2. NON O-RING JOINTS (RCP) SHALL CONFORM TO ASTM C990ADDITIONAL REQUIREMENTS1. AN OPERATIONS AND MAINTENANCE MANUAL AND MAINTENANCE AGREEMENTSHALL BE PREPARED AND PROVIDED TO THE OWNER. ADDITIONAL REQUIREMENTS(e.g. RECORDATION OF EASEMENTS, AGREEMENTS, ETC.) MAY APPLY.SCM 4 - NATURAL DRAW TO BEBACKFILLED WITH INFILTRATION MEDIASCM 5 - NATURAL DRAW TO BEBACKFILLED WITH INFILTRATION MEDIA
CCCCCCASREQ'D3.5'3.5'ASREQ'D7.0'℄TIE TO EXISTINGGROUND*3:1 3:1*TIE TO EXISTINGGROUND1.0'1.0'EXISTING GROUND,TYP.*SLOPE VARIES, SEE SITE PLANAND PROFILE SHEETS TYP.CCCASREQ'D3.5'℄VARIESASREQ'DCCCVARIES 10.3' MAX.POINT BARWIDTH VARIES1.0'0.3'1.3'2:1*2:18:1*TIE TO EXISTINGGROUNDTIE TO EXISTINGGROUNDPOINT BAR SLOPE8:1 MIN., 6:1 MAX.SLOPE MAY VARYWITH WIDTHCCCCCCASREQ'D5.0'ASREQ'D10.0'℄TIE TO EXISTINGGROUND*3:13:1*TIE TO EXISTINGGROUND1.0'1.0'EXISTING GROUND,TYP.2:12:15.0'0.8'*SLOPE VARIES, SEE SITE PLANAND PROFILE SHEETS TYP.*SLOPE VARIES, SEE SITE PLANAND PROFILE SHEETS TYP.BACKFILL MATERIALBMDBMWFILTER FABRIC(TYPICAL)COMPACTED SUBGRADEASSTREAMBANKBANKFULLSECTION A-ASECTION B-B℄POOLFLOWBWBANKFULLBANKFULLBANK TOEBANK TOEHEADER BOULDER, TYP.EXCAVATED POOLGRADEFOOTER BOULDER, TYP.FILTER FABRIC, TYP.BMDBMWBACKFILL MATERIALMATCH UPSTREAMINVERT ELEVATIONSTREAMBANKSET HEADER BOULDER BACK AMINIMUM OF 13 WIDTH OFFOOTER BOULDERNOTES:1. REFER TO PROJECT SPECIFICATIONS FOR IN-STREAM STRUCTURE PLACEMENT,CONSTRUCTION, AND MATERIAL REQUIREMENTS.2. PLACED BOULDERS SHALL NOT BE GAPPED, OR HAVE ANY SIGNIFICANT SPACESBETWEEN THEM.3. REFER TO STRUCTURE DATA TABLE ON THIS SHEET FO IN-STREAM STRUCTUREDIMENSIONS.PLANBBA
A
12 OWOWKWBACKFILL MATERIALFILTER FABRICKEY STRUCTURE INTO BANK.ELEVATION VARIES BASED ONARM SLOPE (AS)SL℄MATTING INTRENCHWOODEN ANCHOR TRENCHON 1' CENTERSANCHOR OVERLAPON 1' CENTERSANCHORS ON3' CENTERS6" OVERLAY (MIN.)DIRECTION OF FLOWPLAN VIEWNOTE:IN AREAS TO BE MATTED, ALL SEEDING, SOILAMENDMENTS, AND SOIL PREPARATION MUST BECOMPLETED IN ACCORDANCE WITH THE PROJECTSPECIFICATIONS, AND PLANTING NOTES PRIOR TOPLACEMENT.TYPICAL SLOUGH CROSS SECTIONCCCEXISTING GRADESLOUGH SIDE SLOPE PROPOSED GRADETRENCH IN MATTING 6" MIN.COIR FIBERMATTINGWOODENANCHORPLACED ATTOE OF SLOPETRENCH INMATTING ANDANCHORSLOUGHBOTTOMONE COIR FIBER MATTING ROLLWIDTH CENTERED AT TOE OFSLOPE MINIMUM ROLL WIDTH = 12.0'6" MIN.PLANTYPICAL STREAM BANK CROSS SECTIONRIFFLERIFFLEPOOLPOOLPOOLRIFFLERIFFLEBARE ROOT, TYP.COIR FIBERMATTINGEXTEND MATTING TONORMAL WATERSURFACE ELEVATION18" (TYP.)BACKFILLANCHORS ON 1'CENTERS INTRENCHMATTING SHALL BEPLACED IN TRENCHAND BACKFILLEDSTREAM BEDFLOODPLAIN/EXISTINGGROUND6" MINCOIR FIBER MATTING INSTALLED PER MANUFACTURER'SSPECIFICATIONS WITH BARE ROOT PLANTINGS, PERMANENTAND TEMPORARY SEEDING PER PLANS AND SPECIFICATIONS.(TYPICAL BOTH SIDES)FLOW45.1WOODEN ANCHORSON 3' CENTERS (e.w., TYP)WOODEN ANCHORSON 3' CENTERS (e.w., TYP)45.145.145.1BW13 SLSLOWKWASA S
BANK TOEBANK TOEBANKFULLBANKFULLPOOLPOOL EXCAVATED PERPLAN & PROFILEFLOWBACKFILLMATERIALFILTERFABRICAABBKEY STRUCTURE INTO BANK.ELEVATION VARIES BASED UPONARM SLOPE (AS)FLOWINVERT, SEE PROFILESCOUR POOLHEADER BOULDEREXCAVATED POOLPER PROFILEGRADEFOOTER BOULDERFILTER FABRICBMDBMW0.5' MAXIMUMDROPBACKFILL MATERIALBACKFILL MATERIALBMDBMWFILTER FABRIC(TYPICAL)COMPACTED SUBGRADEASSTREAMBANKBANKFULLSECTION A-ASECTION B-BPLANNOTES:1. REFER TO PROJECT SPECIFICATIONS FOR IN-STREAM STRUCTURE PLACEMENT,CONSTRUCTION, AND MATERIAL REQUIREMENTS.2. PLACED BOULDERS SHALL NOT BE GAPPED, OR HAVE ANY SIGNIFICANT SPACESBETWEEN THEM.3. REFER TO STRUCTURE DATA TABLE ON THIS SHEET FO IN-STREAM STRUCTUREDIMENSIONS.℄℄MFLOWRevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\Civil Details.dwg- Friday, September 18, 2020 3:49:53 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL249155.0STREAM RESTORATION DETAILS60% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTION65.0COIR FIBER MATTINGNOT TO SCALE45.0ROCK A-VANENOT TO SCALE55.0ROCK VANENOT TO SCALE35.0STRAIGHT POOLNOT TO SCALE25.0MEANDER POOLNOT TO SCALE15.0RIFFLENOT TO SCALE
PROFILE INVERT℄BANKFULLBANK TOEBANK TOEBANKFULLFLOWSILL (TYP.) SEE TABLEFOR MIN. BOULDERDIMENSIONSBBACKFILL MATERIALTOE BOULDER TYP.CCSLBSTREAM INVERTFABRIC FILTER ONBACK OF ALL SILLSSILL BOULDER TYP.BOULDER AND ROCKTOE PROTECTIONWHERE NORMALWATER MEETS THEBANKSKWOWBACKFILL MATERIALTYP.EXISTING GROUND,TYP.KEY TOE BOULDERINTO BANKBANKFULL.BW℄23 BWBMD℄BWBANKFULL.℄23 BW℄ASBACKFILL MATERIALTYP.PLAN VIEWNOT TO SCALEBACKFILL MATERIALTYP.STREAM BOTTOMFLOWHEADER BOULDER, TYP. SEEPROFILE FOR ELEVATIONFILTER FABRIC, TYP. FILTERFABRIC ON BACK OF ALL SILLS,SEE PROJECT SPECIALPROVISIONSBMD, TYP.BMDBMD, TYP.1/2 BMD, TYP.BEDNOTES:1. PLACE FABRIC ON THE UPSTREAM SIDE OF THE MOST UPSTREAM BOULDER SILLIN THE CONSTRUCTED RIFFLE.2. BOULDER SILLS MAY OVERLAP AND ANCHOR THE BOULDER SILL DIRECTLYUPSTREAM.3. THE BOULDER SILL SHALL ALL BE CONSTRUCTED TO BE SUBMERGED ORCOVERED AT LOW FLOWS.SECTION C-CSECTION B-BSECTION A-AFLOWPOOLAABANK WIDTH (BW)POOLPOOL45.1WOODEN STAKE SPACING PER COIR FIBERMATTING, SEE DETAILINSTALL PLANTINGSPER PLANTING PLAN.MATTING SHALL NOTBE CUT OR DAMAGED.INSTALL WOVEN COIR MATNEDIA KOIRMAT 900 COIR FIBERMATTING OR APPROVED EQUAL5' MIN.EXISTING ORPROPOSED GRADEHEIGHT PER PLANCOMPACTED FILL IN 12" LIFTS5' MIN.NON-WOVEN GEOTEXTILE FILTER FABRIC, TYPE IISOIL LIFT FOOTER. WRAP A GRADED MIX OF NCDOT CLASS A RIPRAP, #57 STONE AND SOIL IN NON-WOVEN GEOTEXTILE FILTERFABRIC AND COMPACT. SOIL LIFT FOOTER SHALL BE BELOW GRADE.EXISTING OR PROPOSED GRADE1:1 MAX.SECTION A-AVIEW BXX11.0' SOIL WRAPINSTALL BARE ROOT SEEDLINGS BETWEENSOIL LIFT LAYERS. DO NOT PUNCTURE ORDAMAGE COIR FIBER MATTING DURINGPLANTING.SOIL LIFT SPACING ("X") PERBANK GRADING ON PLAN ANDPROFILE DRAWINGS(EXAMPLE: 2.5:1 SLOPE; X = 2.5)COMPACTED FILLIN 1.0' LIFTSVIEW BBANKFULL ELEVATION. SEEPROFILE ON SITE PLAN ANDPROFILES SHEETSTRENCH IN TOPLAYER OF COIRMATTINGSTAKE SPACINGPER COIR FIBERMATTINGLIFT (TYP.)BANKFULL ELEVATION.SEE PROFILE ON PLANSHEETSCOIR MATTING SEAM. OVERLAP MATTING 6" MIN0.75' o.c. MAX.1.5' o.c. (MAX)LIFT (TYP.)TIE TO EXISTING GRADEBARE ROOT SEEDLING35.1STREAM FLOWPLAN VIEW35.145.1AA24"1"2"2"2" square(nominal)PLACE BARE ROOT SEEDLING INA MINIMUM 3-INCH LAYER OFTOPSOIL.BARE ROOT SEEDLINGPLACE BETWEEN SOIL LIFTLAYERS. ANGLED UPWARD.DETAIL NOTES:1. BARE ROOT SEEDLING SPECIES SHALL BE LIMITED TO RED MAPLE, SYCAMORE, EASTERNCOTTONWOOD, RIVER BIRCH, TULIP POPLAR, AND COMMON ALDER WITHIN THE VEGETATED SOIL LIFT. SEE PLANTING PLAN FOR ADDITIONAL INFORMATION.2. COIR FIBER MATTING SHALL NOT BE PUNCTURED OR TORN TO PLANT BARE ROOT SEEDLINGS.3. BARE ROOT SEEDLINGS SHALL ONLY BE PLANTED IN VEGETATED SOIL LIFT ABOVE THEBANKFULL ELEVATION INDICATED WITHIN THE PLAN AND PROFILE SHEETS.4. TOPSOIL SHALL BE PLACED AROUND THE ROOTS TO THE BARE ROOT SEEDLING PRIOR TOPLACEMENT OF THE TOP SOIL LIFT.5. BARE ROOT SEEDLING SHALL BE PLANTED AT AN ANGLE TO PREVENT LEAF CONTACTWITH THE GROUND.HEADER BOULDER,2' x 3' x 4' (TYP.)FOOTER BOULDER,2' x 3' x 4' (TYP.)FILTER FABRIC, TYP.BACKFILL MATERIALSET HEADER BOULDER BACK AMINIMUM OF 6"2'3'6" (min)1.5'(min)BANKFULL BENCHSTREAMCROSS-SECTIONBANKFULL BENCHCHANNEL INVERTAELEVATION ABBSECTION B-BFILTER FABRIC, TYP.FOOTER BOULDER,2' x 3' x 4' (TYP.)HEADER BOULDER,2' x 3' x 4' (TYP.)STAGGER BOULDERS2' (±) OFFSET (TYP.)BACKFILL MATERIALFLOW25.1BOULDER STEP POOLNOT TO SCALE15.1VEGETATED SOIL LIFTNOT TO SCALEBARE ROOT SEEDLINGPLANTING IN SOIL LIFTNOT TO SCALE35.145.1WOODEN ANCHOR DETAILNOT TO SCALERevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\Civil Details.dwg- Friday, September 18, 2020 5:22:37 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL249155.1STREAM RESTORATION DETAILS60% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTION55.1BOULDER TOENOT TO SCALE
SPILLWAY WIDTH (W)23 STREAM WIDTH (MIN)STREAM WIDTH12" (MIN)2(MAX)1TOP OF CHECK DAM SHALLBE AT LEAST 12" BELOWLEVEL OF LOWEST STREAMBANKCHECK DAM HEIGHT (H)STREAM BED ELEVATION12" (MIN) TO18" (MAX)STREAM BED ELEVATIONTOP OF BANK ELEVATIONCHECK DAM HEIGHT (H)STONE FILTER(#57 STONE)2' (MIN)12" (MIN)APRON LENGTH (L) = 3 x H2(MAX)12(MAX)112" (MIN)WELL GRADED RIPRAPDMIN = 2", DMAX = 12"(CLASS "A" & CLASS "B")STREAM FLOWSTONE FILTER(#57 STONE)APRONLENGTH(L)STREAM FLOW12" (MIN) TO18" (MAX)TOP OF BANKTOP OF BANKPLANAABBSECTION "B-B"SECTION "A-A"15' MINNOTES:1. KEEP CLEARING AND EXCAVATION OF THE STREAM BANKS AND BED ANDAPPROACH SECTIONS TO A MINIMUM.2. CLEARING WITHIN 10 FT OF THE STREAM BANK SHALL BE DONE BY CUTTINGNOT GRUBBING. THE ROOTS AND STUMPS SHALL BE LEFT IN PLACE TO HELPSTABILIZE THE BANKS AND ACCELERATE RE-VEGETATION.3. INSTALL A 6 INCH (MINIMUM) 'LIP' ALONG THE OUTSIDE OF THE BRIDGEMAT TOPREVENT LOOSE SEDIMENT FROM DEPOSITING IN STREAM DURINGCROSSING.4. INSTALL SILT FENCE ALONG TOPS OF BANKS AND TIE TO CROSSING.5. DIVERT ALL SURFACE WATER FROM THE CONSTRUCTION SITE ONTOUNDISTURBED AREAS ADJOINING THE STREAM.6. KEEP STREAM CROSSINGS AT RIGHT ANGLES TO THE STREAM FLOW.7. ALIGN APPROACHES WITH THE CENTER LINE OF THE CROSSING FOR AMINIMUM DISTANCE OF 30 FEET AND STABILIZE WITH 8" THICK LAYER OF 2"-3"WASHED STONE FOR A MINIMUM OF 50 FEET.8. STABILIZE ALL DISTURBED AREAS SUBJECT TO FLOWING WATER, INCLUDINGPLANNED OVERFLOW AREAS, WITH RIPRAP OR OTHER SUITABLE MEANS IFDESIGN VELOCITY EXCEEDS THE ALLOWABLE FOR THE IN-PLACE SOIL.9. USE A SKIDDER OR KNUCKLEBOOM TO INSTALL AND REMOVE MATS.10. PLACE MATS BETWEEN "BUMPER TREES" OR USE DEADMAN ANCHORS TOANCHOR ON BOTH BANKS.11. ENSURE THAT 1/4 (MINIMUM) OF THE MAT TOTAL LENGTH IS SUPPORTED ONEACH SIDE OF THE BANK.12. INSTALL WATER DIVERSION DEVICES ON BOTH SIDES OF THE CROSSING.13. BRIDGEMATS SHALL REMAIN IN PLACE UNTIL COMPLETION OF CONSTRUCTIONUNLESS THE CROSSING CAUSES EROSION DUE TO THE CROSSING OF THESTREAM CHANNEL. IF EROSION OCCURS THE CHANNEL BANKS SHALL BEPLACED BACK TO PRE-CONSTRUCTION CONDITIONS.14. UPON REMOVAL OF BRIDGEMAT RESTORE THE STREAM CHANNEL TO ITSORIGINAL CROSS-SECTION.15. SMOOTH AND STABILIZE ALL DISTURBED AREAS.TOP OF BANKTOP OF BANKSFSFSFSFSFSF
MINIMUM 6" LIP(SEE NOTE 3)12' (MIN)SFSFPLANSECTION A-AAABRIDGEMAT (TIMBER)BBLENGTH (L) AS NEEDED14 LSUPPORTED(MIN)14 LSUPPORTED(MIN)DIVERSIONSWALE/BERMDIVERSIONSWALE/BERMINSTALL TEMPORARY SILTFENCE TO DISCOURAGECROSSING OF THE STREAMAT NON-PROTECTEDCROSSING (TYPICAL)STREAM FLOW ŸDIVERSION SWALE AND/ORBERMS TO DIVERTSURFACE FLOW AROUNDCROSSING (TYPICAL)STONE APRON50' (MIN)ALIGNAPPROACHFOR 30' (MIN)(TYPICAL)BRIDGEMAT (TIMBER)USE OF FILTERFABRIC UNDER STONEIS RECCOMENDED55.1GRIP DRAG CHAIN(TYPICAL)STAGGER SPIKESSPACE AT 2 FT o.c.VARY TIMBER SIZE(e.g. 8"x8" & 8"x10") TOPROVIDE UNEVENSURFACE FORIMPROVED TRACTIONCHOOSE TIMBER WITH SIZEAND STRENGTH TO SUPPORTCONSTRUCTION EQUIPMENTLENGTH AS NEEDEDSPIKES EVERY 2 FTSUGGESTED USE OFHARDWOOD ON OUTERTIMBERSGRIP/DRAG CHAIN(TYPICAL)THREADED ROD 3 FT o.c.1. PREDRILL AND INSERT 34" THREADED STEEL RODS AT 3' o.c.AND SECURE WITH FENDER WASHER AND AT LEAST ONE NUT.2. NAIL INDIVIDUAL TIMBERS TOGETHER WITH 38" X 12" TIMBERSPIKES AT 2' o.c. STAGGER SPIKES AS SHOWN IN DETAIL..WIDTHAS NEEDED1"Ø PREDRILLED HOLE34 " Ø GALVANIZED STEELTHREADED RODGALVANIZEDFENDER WASHERGALVANIZED NUTSPIKE DETAILTHREADED ROD DETAILMAT DETAILSECTION B-BDEFORM THREADSOR USE 2nd NUT TOSECURESTAGGER ENDSOF TIMBERS TOGRIP BANKTEMPORARY STREAM CROSSINGUSING TIMBER MATNOT TO SCALE65.295.2TIMBER MAT DETAILNOT TO SCALE85.2TEMPORARY IN-STREAM ROCKSILT CHECK DAMNOT TO SCALE35.245.215.2RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\Civil Details.dwg- Friday, September 18, 2020 3:50:03 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL249155.2EROSION CONTROL DETAILSTREE PROTECTION FENCENOT TO SCALEFENCE MATERIAL:ORANGE, UV RESISTANTHIGH TENSILE STRENGTHPOLYETHYLENE LAMINARBARRICADE FABRICATTACH SIGNTO POSTDRIP LINEEDGE OF DISTURBED AREA4'-0" O.C.(MAXIMUM)4'-0"(MINIMUM)2'-0"(MINIMUM)12"(MINIMUM)1.33 LBS./FT STEEL POSTINSTALLATION:1. Clear the entrance and exit area of all vegetation, roots, and other objectionable material and properly grade it.2. Place the gravel to the specific grade and dimensions shown on the plans, and smooth it.3. Provide drainage to carry water to a sediment trap or other suitable outlet.4. Use geotextile fabrics because they improve stability of the foundation in locations subject to seepage or high water table.TEMPORARY GRAVEL CONSTRUCTION ENTRANCENOT TO SCALE(Based on NC Erosion and Sediment Control Planning and Design Manual, Standard Practice 6.06)SEDIMENT FENCE (TEMPORARY SILT FENCE)NOT TO SCALEINSTALLATION:1. The base of both end posts should be at least one foot higher than the middle of the fence. Check with level if necessary.2. Install posts 4 feet apart in critical areas and 6 feet apart on standard applications.3. Install posts 2 feet deep on the downstream side of the silt fence, and as close as possible to the fabric, enabling posts tosupport the fabric from upstream water pressure.4. Install posts with nipples facing away from the silt fabric.5. Attach the fabric to each post with three ties, all spaced within the top 8 inches of the fabric. Attach each tie diagonally 45degrees through the fabric, with each puncture at least 1 inch vertically apart. Also, each tie should be positioned to hangon a post nipple when tightened to prevent sagging.6. Wrap approximately 6 inches of fabric around the end posts and secure with 3 ties.7. No more than 24 inches of a 36 inch fabric is allowed above ground level.8. The installation should be checked and corrected for any deviations before compaction.9. Compaction is vitally important for effective results. Compact the soil immediately next to the silt fence fabric with the fronttire of the tractor, skid steer, or roller exerting at least 60 pounds per square inch. Compact the upstream side first, andthen each side twice for a total of 4 trips.(Based on NC Erosion and Sediment Control Planning and Design Manual, Standard Practice 6.62)REINFORCED SILT FENCE OUTLETNOT TO SCALEBURY WIRE FENCE AND FILTER FABRIC(SEE SEDIMENT FENCE DETAIL)BURY HARDWARE CLOTH 8"BURY WIRE FENCE AND FILTER FABRIC (SEESEDIMENT FENCE DETAIL)BURY HARDWARE CLOTH 8"(MIN)STEEL POSTS @ 24" o.c. (MAX)DRIVE 24" (MIN) INTO GROUND4' (MIN)SILT FENCEOVERLAP HARDWARE CLOTH 6" (MIN)EACH END18" - 24"12" (MIN)FILTER STONE(WASHED #57)STEEL POSTWIRE FENCEHARDWARE CLOTHFILTER FABRIC36"NOTES:xHARDWARE CLOTH TO BE 12" MESH, 19 GA. GALVANIZED STEEL WIRE.xREMOVE SEDIMENT WHEN SEDIMENT DEPTH REACHES HALF OF THESTONE HEIGHT.xREPLACE STONE AS NEEDED TO ENSURE FLOW THROUGH FILTER.SECTIONELEVATIONSILT FENCE TO BE12" TALLER (MIN)THAN STONE DEPTHSEE SECTION BELOWRIPRAP OUTLET PROTECTIONNOT TO SCALE(Based on NC Erosion and Sediment Control Planning and Design Manual, Standard Practice 6.41)1. Ensure that the subgrade for the filter and riprap follows the required lines and grades shown in the plan. Compact any fill required in the subgrade to the density of thesurrounding undisturbed material. Low areas in the subgrade on undisturbed soil may also be filled by increasing the riprap thickness.2. The riprap and gravel filter must conform to the specified grading limits shown on the plans.3. Filter cloth, when used, must meet design requirements and be properly protected from punching or tearing during installation. Repair any damage by removing the riprap andplacing another piece of filter cloth over the damaged section. All connecting joints should overlap so the top layer is above the downstream layer a minimum of 1 foot. If thedamage is extensive, replace the entire filter cloth.4. Riprap may be placed by equipment, but take care to avoid damaging the filter fabric.5. The minimum thickness of the riprap should be 1.5 times the maximum stone diameter, or twice the average stone diameter, whichever is greater.6. Riprap may be field stone or rough quarry stone. It should be hard, angular, highly weather-resistant and well graded.7. Construct the apron on zero grade with no overfill at the end. Make the top of the riprap at the downstream end level with the receiving area or slightly below it.8. Ensure that the apron is properly aligned with the receiving stream and preferably straight throughout its length. If a curve is needed to fit site conditions, place it in the uppersection of the apron.9. Immediately after construction, stabilize all disturbed areas with vegetation.Notes:1. La is the length of the riprap apron.2. Do is:xFor circular pipes, the nominal inside pipe diameter.xFor multiple pipes, 1.25 times the largest pipe diameter.xFor noncircular culverts, the square root of the cross-sectional area of the culvert.3. Riprap depth (d) = 1.5 times the maximum stone diameter or 2 times the average stonediameter, whichever is greater, but not less than 6 inches.4. In a well defined channel, extend the apron up the channel banks to an elevation of 6inches above the maximum tailwater depth , or to the top of the bank, whichever is less.5. A stone filter blanket or filter fabric should be installed between the riprap and soilfoundation.PLANSECTION24" MINSEWN-IN CONNECTION SLEEVE FOR PUMPDISCHARGE HOSESILT FENCECOVER #57 STONE PADWITH GEOTEXTILE FABRIC#57 STONE TO LEVEL BAG FROMNATURAL GROUND LINEPOLYETHYLENE SHEETING(6 MIL MIN)DEWATERING FILTER BAGVARIES WITH GROUND SLOPEOPTIONAL LIFTING STRAPSSILT FENCE#57 STONE TO LEVEL BAG FROMNATURAL GROUND LINESILT FENCEEXISTING GRADEPOLYETHYLENE SHEETINGDEWATERINGFILTER BAG6" MIN24" MIN10' MIN24" MIN6" MINVARIES WITHGROUND SLOPEVARIABLE(10' MIN.)GEOTEXTILE FABRICVARIES WITH GROUND SLOPEREINFORCED SILTFENCE OUTLETREINFORCED SILTFENCE OUTLETDEWATERING FILTER BAGNOT TO SCALE(Based on NC Erosion and Sediment Control Planning and Design Manual, Standard Practice 6.06)INSTALLATION:TEMPORARY DIVERSIONSNOT TO SCALEEARTHEN DIVERSION DIKE (TEMPORARY)GRAVEL DIVERSION DIKE FOR VEHICLE CROSSING (TEMPORARY)25.255.265.275.260% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTION
RevisionsU:\19\19-0430\190438-Biltmore Forest - DWI Stream Restoration\CAD\Drawing Sets\Construction\09190430.00 Cross-Section.dwg- Friday, September 18, 2020 5:23:18 PM - BALL, BLAKESheet No.DesignerDrawn ByDateJob No.WithersRavenel115 MacKenan Drive | Cary, NC 27511 | t: 919.469.3340 | license #: C-0832 | www.withersravenel.comEngineers | Planners | SurveyorsGreenwood ParkStream Restoration09190340.00JUNE 2020BGBKB/TSJPRELIMINARYNOT APPROVED FORCONSTRUCTIONNORTH CAROLINA TODD W. ST. JOHNPROFESSIONAL ENGINEERSEAL24915X-1CROSS SECTIONS60% DRAWINGSFOR COORDINATION ONLYNOT PERMITTED FOR CONSTRUCTIONSCALE:1" = 10' HORIZ.1" = 2' VERT.