20191283 Ver 1_More Information Received_20191220

Staff Review
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ID#* Version* 1
20191283
Is this project a public transportation project?* r Yes
r No
Reviewer List:* Sue Homewood:eads\slhomewood
Select Reviewing Office:* Winston-Salem Regional Office - [phone]
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Project Submittal Form
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Project Contact Information
Name: Amanda Weikmann
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Project Information
Existing ID #: Existing Version:
20191283 1
20170001(no dashes)
Project Name: Birch Creek Sewer Information
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County (ies)
Guilford
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191219 BC Phase I Detail Sheets.pdf 13.79MB
191219 BC Sewer Improvements - Phase I.pdf 15.03MB
191219 BCLS Sewer Improvements - Phase Il.pdf 19.15MB
Birch Creek Impact Tables 191217.pdf 57.13KB
Only pdf or kmz files are accepted.
Describe the attachments:
Updated plans and impact tables from the Corps' request for additional information for the Birch Creek Sewer
Improvements.
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BIRCH CREEK SANITARY SEWER OUTFALLMANHOLE SCHEDULEARCADIS G&M of North Carolina, Inc.7029 Albert Pick Road, Suite 101Greensboro, North Carolina 27409Tel: [phone]www.arcadis.comLicense No. C-186927
24ARCADIS G&M of North Carolina, Inc.7029 Albert Pick Road, Suite 101Greensboro, North Carolina 27409Tel: [phone]www.arcadis.comLicense No. C-186927
25ARCADIS G&M of North Carolina, Inc.7029 Albert Pick Road, Suite 101Greensboro, North Carolina 27409Tel: [phone]www.arcadis.comLicense No. C-186927
26ARCADIS G&M of North Carolina, Inc.7029 Albert Pick Road, Suite 101Greensboro, North Carolina 27409Tel: [phone]www.arcadis.comLicense No. C-186927
2715CONSTRUCTION SEQUENCEARCADIS G&M of North Carolina, Inc.7029 Albert Pick Road, Suite 101Greensboro, North Carolina 27409Tel: [phone]www.arcadis.comLicense No. C-186927
GREENSBORO - BIRCH CREEK SEWER - PCN12/17/19RevisionTable C.2: Wetland ImpactsSheet Location2a 2b2c 2d 2e 2fBirch Creek Sewer Improvements (BC) Birch Creek Lift Station Abandonment (BCLS)Wetland Letter Manhole in Wetland Permanent* (P) or Temporary (T) Type of Impact Cowardin Classification Type of Wetland ForestedType of JurisdictionAreas of Impact (acres)Areas of Permanent Maintenance Impact (Acres)Areas of Forested Permanent Maintenance Impact (Acres)Comments BC C-5 W002T&P Excavation PFO Headwater Forest Yes Corps 0.007 0.003 0.003BC C-6 W003T&P Excavation PEM Non-Tidal Freshwater Marsh No Corps 0.090 0.046 -Impacts on PEM wetlands have no permanent conversion impact for mitigation purposes.BC C-6 W003T&P Excavation PFO Headwater Forest Yes Corps 0.005 0.002 0.002BC C-7 W005T&P Excavation PFO Headwater Forest Yes Corps 0.006 0.003 0.003BC C-2 W007T&P Excavation PFO Headwater Forest Yes Corps 0.055 0.03 0.03BC C-4 W011T Excavation PFO Headwater Forest Yes Corps 0.0001 - -BC C-4 & C-5 W012T&P Excavation PFO Headwater Forest Yes Corps 0.037 0.02 0.02BC C-2, 12, 13, 14W013T&P Excavation PFO Headwater Forest Yes Corps 1.052 0.37 0.37BC C-14 W013 45,46 P Disch. Of Fill/Loss of Waters PFO Headwater Forest Yes Corps 0.0006 0.0006 0.0006Due to length of wetland and maximum distance between MHs, unable to avoid placing MHs in wetlands. (25.1 SF)BCLS C-4 W015T&P Excavation PSS Non-Tidal Freshwater Marsh No Corps 0.044 0.022 0.022PSS wetlands are treated as forested wetlands by the Corps, therefore a forested permanent maintenance impact is included.BCLS C-3 W016T&P Excavation PFO Headwater Forest Yes Corps 0.006 0.003 0.003BCLS C-1 W017T&P Excavation PFO Headwater Forest Yes Corps 0.021 0.01 0.01BCLS C-1 W019T&P Excavation PEM Non-Tidal Freshwater Marsh No Corps 0.009 0.004 -Impacts on PEM wetlands have no permanent conversion impact for mitigation purposes.BC C-11 W025T&P Excavation PFO Headwater Forest Yes Corps 0.006 0.004 0.004BCLS C-3 W026T&P Excavation PFO Headwater Forest Yes Corps 0.008 0.004 0.004BC C-10 TG - W24 (SAW 2018-00240)T&P Excavation PFO Headwater Forest Yes Corps 0.0020.0010.001 Linear wetlandBC C-10 TG - W25 (SAW 2018-00240)T Excavation PFO Headwater Forest Yes Corps 0.002 - - Linear wetlandTOTAL DISTURBED AREA1.35 0.52 0.47*Permanent impacts are based on a 10' maintence corridor WETLAND IMPACTSWetland and Stream Impacts 191217.xlsx-T&P ImpactsPage 1 of 2
Table C.3 Stream ImpactsSheet Location3a 3b 3c 3d 3e 3f 3gBirch Creek Sewer Improvements (BC) Birch Creek Lift Station Abandonment (BCLS)PCN Stream Number JD Stream Number Permanent* (P) or Temporary (T) Type of Impact Stream NamePerennial (PER) or Intermittent (INT)Type of JurisdictionAverage Stream Width (ft)Temporary Impact Length (LF)Permanent Impact Length (LF)CommentsBC C-1S0 S023 P Excavation Little Alamance Creek Trib 5 UNT EPHM Corps 16.0 20 10BC C-2S1 S005 T Excavation Little Alamance Creek Trib 6 PER Corps 45.0 30 -BC C-4S2 S007 P Excavation Little Alamance Creek Trib 5 UNT INT Corps 13.0 20 10BC C-5S3 S003 P Excavation Little Alamance Creek Trib 5 UNT PER Corps 11.0 20 10BC C-7S4 S004 P Excavation Little Alamance Creek Trib 5 UNT INT Corps 10.0 20 10BC C-8S5 TG - Stream B (SAW 2018-00240) P Excavation Little Alamance Creek Trib 5 UNT PER Corps 12.0 20 10BC C-10S6 S019 P Excavation Little Alamance Creek Trib 5 UNT INT Corps 8.0 25 10BC C-14S7 S008 P Excavation Little Alamance Creek Trib 6 UNT INT Corps 6.0 20 10BC C-15S8 TG - Stream C (SAW 2018-00240) P Excavation Little Alamance Creek Trib 6 UNT PER Corps 15.0 20 10BCLS C-1S9 S016 T Excavation Little Alamance Creek Trib 6 UNT PER Corps 8.0 45 -BCLS C-1S10 S014a T Excavation Little Alamance Creek Trib 6 PER Corps 50.0 20 -BCLS C-2S11 S010 T Excavation Little Alamance Creek Trib 6 PER Corps 15.0 30 -BCLS C-3S12 S012 P Excavation Little Alamance Creek Trib 6 UNT INT Corps 16.0 45 10Total Temporary Disturbed Length (LF)335Total Permanent Disturbed Length (LF)90*Permanent impacts are based on a 10' maintence corridor Table C.6 Buffer ImpactsSheet Location6b 6c 6d 6e6f 6gBirch Creek Sewer Improvements (BC) Birch Creek Lift Station Abandonment (BCLS)PCN Stream Number JD Stream Number Permanent (P)* or Temporary (T) Reason for Impact Stream Name Buffer Mitigation Required? Zone 1 Impact (sf)Zone 1 Impact (sf) after subtracting WetlandsZone 2 Impact (sf)Zone 2 Impact (sf) after subtracting WetlandsT1,691 1,691 1,854 1,854P624 624 - -T1,238 1,435 1,224 599P608 307 - -T1,868 1,868 2,026 2,026P646 646 - -T1,280 1,174 1,548 1,466P612 506 - -T1,885 1,828 1,873 1,873P610 570 - -T1,800 1,800 2,070 2,070P624 624 - -T2,023 2,023 1,874 1,874P615 615 - -T1,671 1,671 1,841 1,841P613 613 - -TN 2,198 2,198 2,454 2,454PN 695 695 - -TN - - 8,951 8,951Parallel Zone 2 impacts exemptT1,941 1,941 1,267 1,267P1,226 1,226 - -TN 2,038 2,038 2,059 2,048PN 676 676 - -TN - - 3,650 3,131Parallel Zone 2 impacts exemptTN 2,510 2,510 1,077 1,077PN 735 735 - -TN - - 6,435 6,435Parallel Zone 2 impacts exemptT1,709 1,667 1,844 1,565P653 632 - -TN - - 5,780 5,591BC C-13 S14 S009 T Utility Easement Little Alamance Creek Trib 6 UNT N - - 3,061 2,511TN - - 54,986 53,750TOTAL BUFFER IMPACTS (SF)32,789 32,313 105,874 102,383TOTAL PERMANENT BUFFER IMPACTS (SF)8,469BUFFER IMPACTS REQUIRING MITIGATION (SF)0*Permanent impacts are based on a 10' maintence corridor There is no other practical alternative for the stream crossings due to wetland impact avoidances and other constraints. The sewer route was adjusted to minimize wetland impacts and avoid parallel Zone 1 buffer impacts. However, because the gravity sewer will connect between an existing manhole and the Lift Station being abandoned, the sewer must be at elevations able to connect at these locations. Furthermore, the sewer line needs to be constructed at an elevation to accept incoming collector sewers connecting from both sides of the stream which requires that the sewer remain as close as possible to the stream alignment for those connections to be feasible. Stream crossings are therefore constrained by topography and depth (of the sewer). The stream crossings were designed to be perpendicular or near-perpendicular to the stream and the permanent easements were narrowed through the buffer as much as possible to minimize those impacts. The number of permanent streams crossings where limited to those required for maintenance access. Little Alamance Creek Trib 5 UNTPerpendicular Crossing exempt from mitigation. 30ft PE.NNNNPerpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.NPerpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, Zone 2 - Exempt and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Little Alamance Creek Trib 5 UNTS15 S001S023S0S005S1S9S012S12S007S2S10S11S003S3TG - Stream B (SAW 2018-00240)S4S13S019S6S008S7TG - Stream C (SAW 2018-00240)S8Little Alamance Creek Trib 5 UNTUtility EasementNBUFFER IMPACTSCommentsPerpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, Zone 2 - Exempt and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.STREAM IMPACTSS010Little Alamance Creek Trib 6 UNTLittle Alamance Creek Trib 6 UNTPerpendicular Crossing exempt from mitigation. PE varies from 20 - 30 ft. NNS018S016Utility EasementLittle Alamance Creek Trib 5Little Alamance Creek Trib 5 UNTUtility EasementLittle Alamance Creek Trib 6 UNTLittle Alamance Creek Trib 6Utility EasementS014aUtility EasementUtility EasementUtility EasementUtility EasementUtility Easement Little Alamance Creek Trib 5Parallel Zone 2 impacts exemptParallel Zone 2 impacts exemptLittle Alamance Creek Trib 6 UNTUtility EasementBC C-4S004Utility EasementS5Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, Zone 2 - Exempt and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Parallel Zone 2 impacts exemptPerpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, Zone 2 - Exempt and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.Perpendicular Crossing with impacts: Zone 1 - Exempt, Zone 1 - Allowable with no practical alternative, and Zone 2 - allowable with no practical alternative. PE varies from 20 - 30 ft, TCE is 15 ft.NNLittle Alamance Creek Trib 6Utility EasementBC C-2BC C-1BC C-1 to 10BC C-11BCLS C-3BCLS C-2, 3, 4BCLS C-1BCLS C-1BC C-15, 19BC C-14BC C-10BC C-8BC C-7BC C-5Utility Easement Little Alamance Creek Trib 6Little Alamance Creek Trib 5 UNTUtility EasementLittle Alamance Creek Trib 5 UNTUtility EasementWetland and Stream Impacts 191217.xlsx-T&P ImpactsPage 2 of 2