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

CHAPTER 166 ESTABLISHMENT OF ZONING DISTRICTS AND THE OFFICIAL ZONING MAP (2) Any industrial operation or activity that must 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 Section 166.15(15)(L)(4) and Section 166.15(15)(L)(5) is prohibited. (3) Exceptions. The following uses and activities shall be exempt from the vibration level regulations: a. Vibrations not directly under the control of the property user. b. 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. c. Transient vibrations of moving sources such as automobiles, trucks, airplanes, and railroads. d. Vibrations must be expressed as displacement in inches and must be measured with a three-component measuring system approved by the Zoning Administrator. (4) Maximum Permitted Steady-State Vibration Displacement Level. Steady-State Vibration Steady-State Frequency DisplacementA (in.) DisplacementA (in.) (Cycles per second) (Maximum Adjacent (Maximum Adjacent Commercial and Residential Uses) Industrial Uses) 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 A Steady-State vibrations, for purposes of this 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, shall be considered impact vibrations, and shall not cause in excess of twice the displacement stipulated. CODE OF ORDINANCES, TIFFIN, IOWA - 1625 -