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Division 4

31-27 OPEN CHANNELS AND CONDUITS.

Danville Zoning Code · 2026-07 edition · updated 2026-07-09 · Danville

31-27.1 Earth Channels; Maximum Design Velocities.

Maximum design velocities for natural or artificial earth channels shall be those specified by a soil engineer in the preliminary soil report.

31-27.2 Earth Channels; Minimum Velocities.

Minimum velocities at design capacity for earth channels shall be three (3') feet per second.

31-27.3 Earth Channels; Side Slopes.

Side slopes for improved earth channels shall be those specified by a soil engineer, but in no instance shall side slopes be steeper than one and one-half horizontal to one vertical (1 1/2:1).

31-27.4 Lined Channels; Side Slopes.

Side slopes for lined channels shall be those specified by a soil engineer.

31-27.5 Closed Conduits; Minimum Flow Line.

Minimum flow line gradients for closed conduits shall be not less than three one-thousandths (.003') foot per foot.

31-27.6 Closed Conduits or Lined Channels; Outlet Velocity.

Where the outlet velocity from a closed conduit or lined channel exceeds the maximum allowable velocity for the earth channels receiving the flow, suitable protective works such as riprap or a stilling basin shall be provided.

31-27.7 Clearance of Natural Channels.

The subdivider shall, within the boundaries of the subdivision, selectively clear all natural channels and watercourses of all structures, trees, brush, and debris which would interfere with or obstruct the flow of storm waters.

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▸ Contents — Danville Zoning Code
Danville Zoning Code
  1. Chapter I
  2. Chapter II
  3. Chapter III
  4. Chapter IV
  5. Chapter V
  6. Part 1 — GENERAL
  7. Part 2 — CARDROOM LICENSES
  8. Part 3 — CARDROOM RESTRICTIONS
  9. Part 5 — SUSPENSION, REVOCATION, CHANGE AND VARIANCE
  10. Part 1
  11. Part 2
  12. Part 3
  13. Part 4
  14. Part 1
  15. Division 1 — FORM AND CONTENTS
  16. Division 2 — SUPPLEMENTARY DOCUMENTS
  17. Division 3 — CHECKING
  18. Division 4 — APPROVAL
  19. Division 1
  20. Division 3
  21. ▸ Division 4
    Overview
    1. 31-14 PLANS.
    2. 31-15 CONSTRUCTION WORK.
    3. 31-16 STREET LIGHTING.
    4. 31-17 SIDEWALKS AND PATHS.
    5. 31-18 UNDERGROUND UTILITIES.
    6. 31-19 CURBS AND GUTTERS.
    7. 31-20 MISCELLANEOUS PROVISIONS.
    8. 31-21 RESERVED.
    9. 31-22 STREETS.
    10. 31-23 SURVEY MONUMENTS.
    11. 31-24 BRIDGE CROSSINGS AND MAJOR THOROUGHFARES.
    12. 31-25 DRAINAGE; MINIMUM REQUIREMENTS.
    13. 31-26 APPURTENANCES IN PUBLIC RIGHTS-OF-WAY.
    14. 31-27 OPEN CHANNELS AND CONDUITS.
    15. 31-28 LEVEES.
    16. 31-29 EASEMENTS.
    17. 31-30 MISCELLANEOUS PROVISIONS.
    18. 31-31 WATER AND SEWERS.
    19. 31-32 FENCES.
    20. 31-35 PLANNING COMMISSION AUTHORITY.
    21. 31-36 PROCEDURE.
    22. Chapter XXXII
  22. Division 1 — INTRODUCTION
  23. Division 2 — SPECIFIC USES AND DEFINITIONS
  24. Division 3 — DEVELOPMENT STANDARDS
  25. Division 4 — PARKING STANDARDS
  26. Division 5 — DEVELOPMENT PLAN REVIEW PROCEDURES
  27. Division 1 — GENERAL
  28. Division 2 — REQUIREMENTS AND STANDARDS
  29. Division 3 — CREDIT; EXEMPTIONS
  30. Division 4 — DISPOSITION OF FEES AND LAND
  31. Division 5 — PROCEDURES
  32. Division 1 — GENERAL
  33. Division 3 — ENFORCEMENT REGULATIONS
  34. Division 1 — NONRESIDENTIAL CONSTRUCTION
  35. Division 2 — RESIDENTIAL CONSTRUCTION
  36. Division 1 — GENERAL PROVISIONS
  37. Division 2 — APPLICATIONS
  38. Division 3 — ADMINISTRATION
  39. Division 4 — PROVISIONS FOR FLOOD HAZARD REDUCTION
  40. Division 5 — FLOOD HAZARD VARIANCE PROCEDURES
  41. Division 2
  42. Division 5
  43. Division 2 — REQUIREMENTS AND STANDARDS
  44. Division 4
  45. Division 5
  46. Division 2
  47. Division 1
  48. Division 2

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