(A) Interpretation of terms or words. For the purpose of this chapter, certain terms or words are defined. The words and terms used shall be interpreted as follows:
(1) The word PERSON includes a firm, association, organization, partnership, trust, company, corporation, or other legal entity, as well as an individual;
(2) The present tense includes the future tense, the singular number includes the plural, and the plural number includes the singular;
(3) The word SHALL is a mandatory requirement; the word MAY is a permissive requirement; the word SHOULD is a preferred requirement;
(4) The words USED or OCCUPIED include the words INTENDED, DESIGNED, CONSTRUCTED, CONVERTED, ALTERED, or ARRANGED TO BE USED OR OCCUPIED;
(5) The word LOT includes the word TRACT, PLOT or PARCEL; and
(6) Any word or term not defined herein shall be given a meaning found in a standard English dictionary.
(B) Definitions. For the purpose of this chapter, the following definitions shall apply:
ADMINISTERING AUTHORITY. The Plan Commission of the Town of Monrovia, Indiana.
AGRICULTURAL LAND USE. Use of land for the production of animal or plant life including forestry, pasturing or yarding livestock and planting, growing, cultivating, and harvesting crops for human or livestock consumption.
CAPACITY OF A STORM DRAINAGE FACILITY. The maximum flow that can be conveyed or stored by a storm drainage facility without causing damage to public or private property.
CHANNEL. A natural or artificial watercourse which periodically or continuously contains moving water or which forms a connecting link between 2 bodies of water. It has a defined bed and banks which serve to confine the water.
COMMERCIAL LAND USE. Use of land for the manufacturing, wholesale or retail sale of goods or services.
COMMISSION. The Plan Commission of the Town of Monrovia, Indiana.
COMPENSATORY STORAGE. An artificial volume of storage within a floodplain used to balance the loss of natural flood storage capacity when artificial fill or structures are placed within the floodplain.
CONTIGUOUS. Adjoining or in actual contact with.
CULVERT. A closed conduit used for the passage of surface drainage water under a roadway, railroad, canal or other impediment.
DETENTION BASIN. A facility constructed or modified to restrict the runoff of storm water to a prescribed maximum rate, and to detain for a specified period of time the excess waters that accumulate upstream from the outlet.
DETENTION STORAGE. The temporary detaining or storage of storm water in storage basins, under predetermined and controlled condition.
DRAINAGE AREA. The area from which water drains to a point of consideration.
DROP MANHOLE. A manhole having a vertical drop pipe connecting the inlet pipe to the elevation of the outlet pipe. The vertical drop pipe shall normally be located immediately outside the manhole.
DRY BOTTOM DETENTION BASIN. A basin designed to be completely dewatered after having provided its planned detention of runoff during a storm event.
EROSION. The detachment and movement of soil, sediment or rock fragments by water, wind, ice or gravity.
EROSION AND SEDIMENT CONTROL MEASURE. A practice or a combination of practices to control erosion and resulting off-site sedimentation.
EROSION AND SEDIMENT CONTROL PLAN. A written description and drawings of pertinent information concerning erosion and sediment control measures designed to meet the requirements of this chapter.
FLOOD or FLOODWATER. Water which overflows the banks of a lake or watercourse.
FLOOD ELEVATION. The maximum level of high waters for a flood of given return period and rainfall duration.
FLOOD HAZARD AREA. Any floodplain, floodway, floodway fringe, or any combination which is subject to inundation by the regulatory flood or any floodplain as delineated by Zone A on the current Flood Hazard Boundary Map of the Federal Emergency Management Agency.
FLOOD PROTECTION GRADE. An elevation which is a specific distance above the regulatory flood elevation as established by agencies having jurisdiction.
FLOODPLAIN. The area adjoining the river or stream which has been or may be covered by floodwaters. It consists of both the floodway and floodway fringe.
FLOODWAY. See REGULATORY FLOODWAY.
FLOODWAY FRINGE. That portion of the floodplain lying outside the floodway which is inundated by the regulatory flood.
FOOTING DRAIN. A drainpipe installed around thee exterior of abasement wall or foundation or located in a crawl space to prevent water from entering a basement or crawl space.
GRADIENT. The inclination or slope of a channel, conduit or natural ground surface, expressed as a ratio of the vertical rise or fall to the corresponding horizontal distance.
IMPACT AREAS. Areas defined by the Commission which are unlikely to be easily drained because of 1 or more factors including, but not limited to, any of the following: Soil type; topography; land where there is not an adequate outlet; a floodway or floodplain; land within 75 feet of each bank of legal drain or within 75 feet from the centerline of any legal tile drain; or within recorded drainage easements of a legal drain.
IMPERVIOUS. A material through which water cannot pass or through which water passes with difficulty.
IMPROVEMENT LOCATION PERMIT. A permit stating that the proposed erection, construction, enlargement or moving of a building or structure complies with the provisions of the Town of Monrovia Zoning Ordinance.
INLET. An opening into a storm sewer system for the entrance of surface storm water runoff, more completely described as a storm sewer inlet.
JUNCTION CHAMBER. Structure used to facilitate the flow from 1 or more conduits into a main conduit.
LAND DISTURBING ACTIVITY or NONAGRICULTURAL LAND DISTURBING ACTIVITY. Any manmade change of the land surface including removing vegetative cover, excavating, filling, transporting, and grading. It includes any activity requiring the Town of Monrovia improvement location permit, but does not include agricultural land uses.
LEGAL DRAIN. Any drain that has been accepted and is maintained by the Plan Commission in accordance with the 1965 Drainage Act and its amendments.
MANHOLE. Storm sewer structure through which a person may enter to gain access to a storm sewer or enclosed structure. A MANHOLE may also be an inlet for the storm sewer system.
OUTFALL. The point or location where storm runoff discharges from a sewer, channel or detention facility.
PEAK FLOW. The maximum rate of flow of water at a given point in a channel or conduit resulting from a specified storm or flood of a given return period or duration.
PERIMETER DRAIN. A title drain located around an absorption field in compliance with appropriate governmental regulations.
RAINFALL INTENSITY. The rate of rainfall expressed as the amount of rain occurring within a given duration, normally expressed in inches per hour.
REACH. A specified length of a river, channel, or conduit.
REGULATED AREA. All of the land under the jurisdiction of the Town of Monrovia Plan Commission.
REGULATORY FLOOD. A flood with a peak having a probability of occurrence of 1% in any given year, which is commonly referred to as a 100-year flood as calculated by a method and procedure which is acceptable to the Commission. If a permit for construction in the floodway is required by the Indiana Department of Natural Resources, the regulatory peak discharge shall be calculated by the method and procedure acceptable to the Commission and the Indiana Department of Natural Resources.
REGULATORY FLOODWAY. The channel of a river or stream and those portions of the floodplain adjoining the channel which are reasonably required to carry and discharge the peak flow of the regulatory flood of any river or stream.
RELEASE RATE. The amount of water released from a storm water control facility per unit of time.
RETURN PERIOD. The average interval of time within which a given rainfall event will be equaled or exceeded once. A flood having a return period of 100 years has a 1% probability of being equaled or exceeded in any 1 year.
RUNOFF. The portion of precipitation from the sources as rainfall, snow melt, or irrigation water that flows over or under the ground surface and arrives at the point of consideration as surface water.
RUNOFF COEFFICIENT. A factor in the rational formula which relates the ratio of peak runoff to rainfall and considers the factors as ground cover, soil types, and watershed configuration.
SEDIMENT. Material of soil and rock origin transported, carried or deposited by water.
SIPHON. A closed conduit, a portion of which lies above the hydraulic grade line resulting in a pressure less than atmospheric and requiring a vacuum within the conduit to start flow. An inverted siphon is used to carry flow under an obstruction.
SITE. The entire-area included in the legal description of the land on which the land disturbing activity is proposed in the permit application.
SPILLWAY. A waterway in or about a hydraulic structure for the escape of excess water.
STILLING BASIN. A structure used to dissipate the energy and/or velocity of flowing water.
STORAGE DURATION. The length of time that water may be stored in any storm water control facility.
STORM SEWER. A closed conduit for conveying collected storm water.
STORM WATER DRAINAGE SYSTEM. All means, natural or manmade, used for conducting storm water to, through or from a drainage area.
SUBSURFACE DRAIN. A tile drain installed for the purpose of lowering the ground water table.
TOWN STAFF or TOWN PLAN COMMISSION STAFF. Staff as appointed by the Plan Commission.
URBANIZATION. The development, change or improvement of any parcel of land consisting of one or more lots for residential, commercial, industrial, instructional, recreational or public utility purposes.
WATERCOURSE. Any natural or manmade drainage way having a defined channel and banks and into which storm water runoff or floodwaters flow either regularly or intermittently.
WATERSHED. See DRAINAGE AREA.
WET BOTTOM DETENTION BASIN/RETENTION BASIN. A basin designed to retain a permanent pool of water plus capacity to detain and release excess runoff.
WETLANDS. Those areas which have hydric soils and that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support and that, under normal circumstances, do support a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas.
(Ord. passed 10-11-2004)