kane county stormwater technical guidance manual - Kane County, IL

More documents

Recommendations

Info

No. Name LIST OF TABLES Kane County Technical Guidance Manual Page No. 1 Site Runoff Storage Requirements...................................................................... 5 2 Illinois State Water Survey Bulletin 70 Rainfall Depths...................................... 19 3 Huff Rainfall Distributions...................................................................................... 25 4 Huff Quartile Distributions ..................................................................................... 26 5 Soil Erodibility........................................................................................................ 43 6 Seed Mixtures for Temporary Stabilization Remaining Less Than One Year......................................................................................................................... 45 7 Seed Mixtures for Temporary or Permanent Stabilization Remaining More Than One Year ............................................................................................. 46 8 Permanent Stabilization Practices ...................................................................... 56 9 Date Requirements for Revisions to Mapped Areas......................................... 78 10 Factors Influencing FQI.......................................................................................... 83 11 Buffer Width Calculation Scenarios..................................................................... 90 12 Water Body Buffer Widths .................................................................................... 91 13 Sources of Buffer Plant Materials ........................................................................ 93 14 Mitigation Requirements....................................................................................... 112 15 Floristic Quality Mitigation Performance............................................................. 114 APPENDIX A Table A1 Composite Runoff Coefficients for Unlined Channels................................138 Table A2 Typical Roughness Coefficients for Open Channels................................ 139 Table A3 Manning’s Roughness Coefficients for Straight Channels Without Shrubbery or Trees ............................................................................................... 142
No. Name LIST OF FIGURES Kane County Technical Guidance Manual Page No. 1 Geometric Elements of Channel Sections.......................................................... 7 2 Required Flood Protection Elevation................................................................ 9 3 Detention Example................................................................................................13 4 Maximum Allowable Flow Depths on Roadways ...............................................21 5 Hydrologically Disturbed Area Example .............................................................24 6 Median Time Distribution of Heavy Storm Rainfall at a Point...........................27 7 100-Year Detention Volume Vs Percent Impervious.........................................30 8 Conceptual Park Area to Compensate for Retention Volume .........................33 9 Detention Configuration for Proposed Requirements When Water Table is Above Pond Bottom......................................................... 34 10 Detention Configuration for Proposed Requirements When Water Table is Below Pond Bottom......................................................... 35 11 Detention Configuration for Proposed Requirements When Water Table is Above Pond Bottom......................................................... 36 12 Control Structure Configuration Requirements for Agricultural Drain Tile Connection....................................................................... 37 13 Separation for Subsurface Drainage Pipes and Detention Pond Discharge Pipes........................................................................ 38 14A Sediment Control Practices.................................................................................50 14B Sediment Control Practices.................................................................................51 15A Soil Stabilization Practices ..................................................................................52 15B Soil Stabilization Practices ..................................................................................53 16 Sediment and Erosion Control Plan Example....................................................55 17 Stabilized Construction Entrance ........................................................................59 18 Required Flood Protection Elevation................................................................ 68 19 Compensatory Storage Example ........................................................................70 20 Floristic Quality Assessment Example................................................................84 21 Linear and Water Body Buffers............................................................................88 22 Buffer Width Scenarios.........................................................................................92 23 Measurement Reference for Linear and Water Body Buffers ..........................94 24 Wetland Delineation Example..............................................................................103
Page 1 and 2: KANE COUNTY STORMWATER TECHNICAL GU
Page 3 and 4: Kane County Technical Guidance Manu
Page 5: ARTICLE 13 - FEE-IN-LIEU OF SITE RU
Page 9 and 10: Organization The Manual is comprise
Page 11 and 12: ARTICLE 2 - REQUIREMENTS FOR STORMW
Page 13 and 14: applicant to provide retention volu
Page 15 and 16: § T201(e) Protection of Buildings
Page 17 and 18: § T201(f) Planning Principles Meet
Page 19 and 20: 1. Identify all points where runoff
Page 21 and 22: FIGURE 3 Detention Example (continu
Page 23 and 24: 3. Calculating overland flow paths
Page 25 and 26: soil tributary to the downstream sy
Page 27 and 28: purpose of the easement is for main
Page 29 and 30: In general: 1. Impervious surfaces
Page 31 and 32: FIGURE 5 Hydrologically Disturbed A
Page 33 and 34: TABLE 4 Huff Quartile Distributions
Page 35 and 36: FIGURE 6 Median Time Distribution o
Page 37 and 38: All runoff volumes shall be calcula
Page 39 and 40: The retention volume may be reduced
Page 41 and 42: FIGURE 9 Detention Configuration fo
Page 43 and 44: FIGURE 11 Detention Configuration f
Page 45 and 46: FIGURE 13 Separation for Subsurface
Page 47 and 48: § T203(i) Site Runoff Storage Faci
Page 49 and 50: etter information is submitted and
Page 51 and 52: Surface Erosion Factor Subsoil Eros
Page 53 and 54: TABLE 7 Seed Mixtures For Temporary
Page 55 and 56: § T300(d) Extended Construction Sh
Page 57 and 58:
FIGURE 14A Sediment Control Practic
Page 59 and 60:
Figure 15A Soil Stabilization Pract
Page 61 and 62:
§ T300(g) Limitation on Site Distu
Page 63 and 64:
TABLE 8 Permanent Stabilization Pra
Page 65 and 66:
must be cleaned before the end of e
Page 67 and 68:
ARTICLE 4 - PROTECTION OF SPECIAL M
Page 69 and 70:
For projects where no Regulatory Fl
Page 71 and 72:
Residential Buildings The Ordinance
Page 73 and 74:
nonresidential), the flood insuranc
Page 75 and 76:
FIGURE 18 Required Flood Protection
Page 77 and 78:
§ T409 Lowest Opening Proposed str
Page 79 and 80:
crossing. The floodplain downstream
Page 81 and 82:
any revised floodway or will agree,
Page 83 and 84:
Illinois Department of Natural Reso
Page 85 and 86:
applicant will have to manually adj
Page 87 and 88:
exception of the appropriate use re
Page 89 and 90:
For all on-site wetlands with buffe
Page 91 and 92:
Site: Kane County Stormwater Exampl
Page 93 and 94:
§ T415 Mitigation to be Local All
Page 95 and 96:
FIGURE 21 Linear and Water Body Buf
Page 97 and 98:
TABLE 11 Linear Buffer Width Calcul
Page 99 and 100:
FIGURE 22 Buffer Width Scenarios Ka
Page 101 and 102:
FIGURE 23 Measurement Reference for
Page 103 and 104:
ARTICLE 5 - STORMWATER MANAGEMENT P
Page 105 and 106:
§ T502(a) Required Submittals If t
Page 107 and 108:
An example of a narrative descripti
Page 109 and 110:
) Buffer Requirements. The buffer r
Page 111 and 112:
ARTICLE 6 - LONG-TERM MAINTENANCE T
Page 113 and 114:
90% of the slopes, as measured by a
Page 115 and 116:
ARTICLE 7 - ENFORCEMENT AND PENALIT
Page 117 and 118:
§ T1500 General ARTICLE 15 - WETLA
Page 119 and 120:
TABLE 14 Mitigation Requirements Mi
Page 121 and 122:
etween wetland mitigation facilitie
Page 123 and 124:
Director will reduce the wetland pe
Page 125 and 126:
FORMS The following sheets contain
Page 127 and 128:
KANE COUNTY STORMWATER MANAGEMENT P
Page 129 and 130:
Identifier 2A 2B 2C 2D 2E 2F 2G 2H
Page 131 and 132:
Identifier 4A 4B 4C 4C-1 4C-2 4C-3
Page 133 and 134:
Identifier 5D-3 5D-4 5D-5 5D-6 5D-7
Page 135 and 136:
Identifier Kane County Stormwater M
Page 137 and 138:
COMMUNITY CONTACT FOR STORMWATER MA
Page 139 and 140:
CERTIFIED COMMUNITY FORM FOR EXEMPT
Page 141 and 142:
INSPECTION CHECKLIST DURING CONSTRU
Page 143 and 144:
DEVELOPER’S STATEMENT Right to Dr
Page 145 and 146:
APPENDICES Kane County Technical Gu
Page 147 and 148:
TABLE A2 Typical Roughness Coeffici
Page 149 and 150:
TABLE A2 (continued) Typical Roughn
show all

kane county stormwater technical guidance manual - Kane County, IL

Create successful ePaper yourself

Delete template?

Save as template?