Packet: Tiffin City Council Work Session (09/15/2026)

CHAPTER 166 ESTABLISHMENT OF ZONING DISTRICTS AND THE OFFICIAL ZONING MAP Maximum Permitted Steady-State Vibration Displacement Level Frequency I.* Displacement II.*Displacement (Cycles per Second) (inches) (inches) 0-9 0.0008 0.0004 10-19 0.0005 0.0002 20-29 0.0003 0.0001 30-39 0.0002 0.0001 40-over 0.0001 0.0001 * Steady-state vibrations, for purposes of this Zoning Code, are vibrations that are continuous, or vibrations in discrete impulses more frequent than 100 per minute. Discrete impulses that do not exceed 100 per minute, must be considered impact vibrations, and must not cause in excess of twice the displacement stipulated. Maximum Permitted Impact Vibration Displacement Level Frequency I. Displacement II.*Displacement * (Cycles per Second) (inches) (inches) 0-9 0.0016 0.0006 10-19 0.0010 0.0003 20-29 0.0006 0.0002 30-39 0.0004 0.0001 40-over 0.0002 0.0001 * Impact vibrations, for purposes of this Zoning Code, are vibrations that occur in discrete impulses separated by an interval of at least one minute and numbering not more than eight in any 24-hour period. b. In addition, any industrial operation or activity that may cause at any time and at any point along a residential district boundary line, earth borne vibrations in excess of the limits set forth in Column II of the tables in sub-paragraph above is prohibited. c. Vibrations must be expressed as displacement in inches and must be measured with a three-component measuring system approved by the Zoning Administrator. d. Exceptions. The following uses and activities shall be exempt from the vibration level regulations: i. Vibrations not directly under the control of the property user. ii. Vibrations emanating from construction and maintenance activities between 7:00 a.m. and 9:00 p.m. Such activities are those that are non-routine operations accessory to the primary activities and that are temporary in nature, or conducted infrequently. iii. Transient vibrations of moving sources such as automobiles, trucks, airplanes, and railroads. CODE OF ORDINANCES, TIFFIN, IOWA - 1715 -