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Home My WebLink About20060447 Ver 3_HLE18020-Impact Tables_20200518Impact (LF) Avg Width (FT) Impact Area (SF) Ratio Mitigation Required (LF) Impact (LF) Avg Width (FT) Impact Area (SF) Impact (LF) Avg Width (FT) Impact Area (SF) S1 Construction Access P 3 6 19 S2 Culvert P 120 6 718 2 240 S3 Riprap P 32 6 197 S4 Construction Access P 2 8 16 S5 Construction Access P 3 6 19 S6 Culvert P 150 4 664 2 300 S7 Riprap P 43 8 194 S8 Construction Access P 2 5 10 S9 Culvert I 13 2 25 0.5 6.5 S10 Riprap I 16 2 31 S11 Construction Access I 2 2 4 S12 Fill I 26 2 49 0.5 13 S13 Construction Access I 3 9 31 S14 Culvert I 112 9 941 0 0 S15 Riprap I 22 8 246 S16 Construction Access I 2 12 23 H2 Road Widening S17 Culvert Extension P 48 3 150 2 96 I2 Road Widening S18 Stream Relocation P 351 3 1,143 0.5 175.5 820 NA 3,690 NA 831 668 17 NA 122 (0.075 AC) (0.042 AC) 1 P = perennial; I = intermittent 2 Impact is to an unnamed tributary to Big Branch. All other stream impacts are unnamed tributaries to Walnut Creek. 3 See letter for a breakdown of intermittent and perennial stream impacts Stream Type1 Loss of Waters Temporary Permanent Not a Loss of Waters D E Road Crossing Road Crossing 113 TOTAL3 NA Impact Area B A Reason for Impact ID Impact Type Road Crossing Road Crossing Table M1. Jurisdictional Stream Impacts + Mitigation Temporary Impact Type Impact (AC) Ratio Mitigation Required (AC) Impact (AC) A Road Crossing W1 Avoided 0.002 ac 0 W2 Construction Access 0.001 W3 Fill 0.298 2 0.596 W4 Construction Access 0.002 W5 Avoided 0.021 ac 0 W6 Avoided 0.031 ac 0 Road Crossing W7 Fill 0.009 2 0.018 Road Crossing W8 Culvert 0.032 2 0.064 F Lot Fill 0 G Lot Fill 0 W9 Fill 0.076 1 0.076 W10 Fill 0.137 1 0.137 W11 Fill 0.001 1 0.001 W12 Fill 0.104 1 0.104 W13 Excavation 0.004 1 0.004 W14 Excavation 0.004 1 0.004 W15 Excavation 0.003 1 0.003 W16 Grading 0.018 W17 Grading 0.005 W18 Grading 0.008 W19 Grading 0.037 W20 Construction Access 0.079 W21 Construction Access 0.005 TOTAL 0.668 1.007 0.155 1 Impact is to wetland adjacent to an unnamed tributary to Big Branch. All other impacts to wetland adjacent to unnamed tributaries to Walnut Creek. Permanent Table M2. Jurisdictional Wetland Impacts + Mitigation Lot FillC E Impact Area B Road Crossing Reason for Impact ID I1 Road Widening H1 Road Widening Avoided 0.392 ac Impact Area Impact ID Impact Type + Use Classification Permanent or Temporary Stream Name Buffer Mitigation Required? Zone 1 Impact Required Zone 1 Mitigation1 Zone 2 Impact Required Zone 2 Mitigation2 Total Buffer Impact Total Mitgation Required A B1 Road Crossing - Allowable w/mitigation P UT to Walnut Creek Y 11,316 33,948 7,133 10,700 18,449 44,648 B B2 Road Crossing - Allowable w/mitigation P UT to Walnut Creek Y 10,845 32,535 6,335 9,503 17,180 42,038 D B3 Road Crossing - Allowable w/mitigation P UT to Walnut Creek Y 3,441 10,323 3,991 3,993 7,432 14,316 E B4 Road Crossing - Allowable P UT to Walnut Creek N 8,405 0 5,638 0 14,043 0 B5 Road Crossing - Allowable P UT to Big Branch N 2,655 0 1,667 0 4,322 0 B6 Road Crossing - Allowable P UT to Big Branch N 46 0 437 0 483 0 B7 Nonperpendicular Road Impact - Allowable w/mitigation P UT to Big Branch Y 521 1,563 6,533 9,800 7,054 11,363 B8 SW Outlet - Allowable P UT to Big Branch N 528 0 298 0 826 0 B9 SW Outlet - Allowable P UT to Big Branch N 429 0 233 0 662 0 B10 SW Outlet - Allowable P UT to Big Branch N 471 0 318 0 789 0 K B11 SW Outlet - Allowable P UT to Walnut Creek N 491 0 528 0 1019 0 Total 39,148 78,369 33,111 33,994 72,259 112,363 M3. Riparian Buffer Impacts + Mitigation 1 Zone 1 multiplier of 3 applied 2 Zone 2 multiplier of 1.5 applied H J I