Appendix I OFFICE OF THE MORGAN COUNTY SURVEYOR STORMWATER DESIGN MANUAL 7/1/2008
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1 Appendix I OFFICE OF THE MORGAN COUNTY SURVEYOR
2 This Page Left Intentionally Blank OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX I PAGE 1
3 Appendix II OFFICE OF THE MORGAN COUNTY SURVEYOR
4 This Page Left Intentionally Blank OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX II PAGE 1
5 Appendix III OFFICE OF THE MORGAN COUNTY SURVEYOR
6 _TYPE OF SURFACE RUNOFF COEFFICIENT_ Non-Urban Areas Bare Earth 0.55 Steep Grassed Areas (slope 2:1) 0.60 Turf Meadows 0.25 Forested Areas 0.20 Cultivated Fields 0.30 Urban Areas All Watertight Roof Surfaces 0.90 Pavement (concrete, asphalt) 0.85 Gravel 0.85 Impervious Soils (Heavy) 0.55 Impervious Soils (with turf) 0.45 Slightly Pervious Soil 0.25 Slightly Pervious Soil (with turf) 0.20 Moderately Pervious Soil 0.15 Moderately Pervious Soil (with turf) 0.10 Business, Commercial & Industrial 0.85 Apartments & Townhouses 0.70 Schools & Churches 0.55 Single Family Lots < 10,000 ft Lots < 12,000 ft Lots < 17,000 ft Lots > ½ Acre 0.35 Park, Cemetery or Unimproved Area VI-TR-55, Second Edition, June 1986 Table (TR-55 Table 3-1) : Runoff Coefficient s for use in the Rational Method calculations for Pipe, Channel and Detention Design OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 1
7 Worksheet 3.2.1: Time of Concentration or Travel Time Worksheet OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 2
8 _SURFACE DESCRIPTION n Smooth Surfaces (concrete, asphalt, gravel, bare soil) Fallow (no residue) 0.05 Cultivated Soils: Residue cover </= 20% 0.06 Residue cover > 20% 0.17 Grass: Short Grass Praire 0.15 Dense Grass 0.24 Bermuda Grass 0.41 Range (natural) 0.13 Woods: Light Underbrush 0.40 Dense Underbrush VI-TR-55, Second Edition, June 1986 Table (TR-55 Table 3-1): Roughness coefficient s (Manning s n) for sheet flow to be used in Time-of-Concentration calculations OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 3
9 Figure (TR-55 Figure 3-1): Average Velocities for Estimating Travel Time for Shallow Concentrated Flow. OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 4
10 210-VI-TR-55, Second Edition, June 1986 Worksheet (TR-55 Worksheet 2): Runoff Curve Number Worksheet OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 5
11 Table (TR-55 Table 2-2a): Runoff Curve Numbers for Urban Areas OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 6
12 Table (TR-55 Table 2-2b): Runoff Curve Numbers for Cultivated Agricultural Lands OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 7
13 Table (TR-55 Table 2-2c): Runoff Curve Numbers for Other Agricultural Lands OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 8
14 Return Period a b N R Table : IDF EQUATION VALUES OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 9
15 Return Period Rainfall Intensity (in/hr) Hours Minutes Table : IDF Table OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 10
16 Return Period Rainfall Depth (in) Hours Minutes Table : IDD Table OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 11
17 Cumulative Storm Time (Percent) Cumulative Storm Rainfall (percent) for Given Storm Type First Quartile Second Quartile Third Quartile Fourth Quartile (SOURCE: Rainfall Frequency Atlas of the Midwest by Huff and Angel) Table : Median Time Distributions of Heavy Storm Rainfall at a Point OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX III PAGE 12
18 Appendix IV OFFICE OF THE MORGAN COUNTY SURVEYOR
19 Pipe Material Manning s_n_ Concrete Pipe Concrete Boxes Corrugated Metal Pipe or Pipe Arch 2 2/3 x ½ Helical Corrugation /3 x ½ Annular Corrugation to to x 1 Corrugation x 1 Corrugation Structural Plate Pipe or Pipe Arch 6 x 2 Corrugation x 2½ Corrugation Spiral Ribbed Corrugated Metal Pipe Smooth High Density Polyethylene (HDPE) Smooth Lined Interior Polyvinyl Chloride (PVC) Smooth Interior Corrugated HDPE Ductile Iron Pipe Table : Manning s n Values for Pipes OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 1
20 Storm Drain Computation Sheet DATE PROJECT ROUTE COMPUTED BY: CHECKED BY: SHEET OF From Station To Length (ft) Increment Drainage Area (acres) Total Runoff Coefficient C Increment A x C Total Flow Time (min) To Upper End In Section Rainfall Intensity (in/hr) Total Runoff Q (cfs) Diameter of Pipe (in) Slope of Pipe (ft/ft) Flowing Full Velocity Upstream Invert Elevation Downstrea m Invert Elevation Manhole Invert Drop Depth of Cover Worksheet (INDOT Figure 36-12F): Storm Drain Computation Sheet OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 2
21 Hydraulic Grade Line Computation Sheet DATE PROJECT ROUTE COMPUTED BY: CHECKED BY: SHEET OF Station TW D O Q O L O V O V 2 o /2g H O Sf O H f K O C D C d C Q C P C B K K(V 2 o /2g) EGL O EGL HGL TOC EGL-7 ELEV (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14 15) (16) (17) (18) (19) (20) (21) (22) Worksheet (INDOT Figure 36-13D): Hydraulic Grade line Computation Sheet OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 3
22 INLET COMPUTATION SHEET DATE PROJECT ROUTE COMPUTED BY: SHEET OF Location Gutter Discharge (Design Frequency ) Gutter Discharge (Allowable Spread ) Inlet Discharge Remarks Inlet No. Stat. Drain Area A (acre) Runoff Coefficient C Time of Concentration T c (min.) Rainfall Intensity i (in/hr) Flow Q (cfs) Grade S o (ft/ft) Cross Slope S x (ft/ft) Prev. Runby (cfs) Total Gutter Flow (cfs) Depth d (ft) Gutter Width W (ft) Spread T (ft) W/T Inlet Type Intercept Q i (cfs) Runby Q r (cfs) Worksheet (INDOT Figure 36-10K): Inlet Spacing and Gutter Spread Computation Sheet OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 4
23 _Type of Gutter or Pavement Manning s n _ Concrete Asphalt Pavement: Smooth Texture Rough Texture Concrete Gutter Asphalt Pavement: Smooth Rough Concrete Pavement: Float Finish Broom Finish For Gutters with small slope, where sediment may Accumulate, increase the n values above by: USDOT, FHWA, HDS-3 (1961) Table : Roughness coefficient s (Manning s n) for Street and Pavement Gutters OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 5
24 _Open Channel Surface Material n Concrete Gravel Bottom with sides - Concrete Mortared Stone Rip-Rap Natural Stream Channels: Clean, Straight Stream Clean, Winding Stream Winding with weeds and pools With Heavy Brush and Timbers Flood Plains: Pasture Field Crops Light Brush and Weeds Dense Brush Dense Trees Chow, 1959 Table : Roughness coefficient s (Manning s n) for Open Channel Surfaces OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 6
25 Typical Maximum Velocities for Open Channel Linings Open Channel Lining Material Desirable Maximum Velocity (ft/s) Concrete, Trowel Finish 15 Concrete, Broom or Float Finish 15 Rip-Rap 10 Gabions 10 New Earth (Uniform, Sodded, Clay) 3-5 Existing Earth (Fairly Uniform, With Some 3-5 Weeds Dense Weeds 3-5 Swale with Grass 3-5 Table : Desirable Maximum Velocities for Open Channel Linings OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX IV PAGE 7
26 Appendix V OFFICE OF THE MORGAN COUNTY SURVEYOR
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28 Appendix VI OFFICE OF THE MORGAN COUNTY SURVEYOR
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30 Appendix VII OFFICE OF THE MORGAN COUNTY SURVEYOR
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32 Appendix VIII OFFICE OF THE MORGAN COUNTY SURVEYOR
33 Appendix IX OFFICE OF THE MORGAN COUNTY SURVEYOR
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35 Appendix X OFFICE OF THE MORGAN COUNTY SURVEYOR
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37 Appendix XI OFFICE OF THE MORGAN COUNTY SURVEYOR
38 This Page Left Intentionally Blank OFFICE OF THE MORGAN COUNTY SURVEYOR APPENDIX XI PAGE 1
39 Appendix XII OFFICE OF THE MORGAN COUNTY SURVEYOR
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