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Stormwater management systems shall be designed in accordance with the requirements of title 14, chapter 12 of this code, as amended. The site, including parking lots, shall be developed using two (2) or more of the following low impact development tools or other best management practices approved by the city engineer:
A. Reduced Lot Grading: Ground slope reduction outside the immediate perimeter of a building (where foundation drainage is not a concern) to promote stormwater infiltration or filtration.
B. Check Dams: Where narrow areas and/or excessive grades force the construction of less than ideal steep swales, rock check dams can be added to slow flows, minimize erosion, and improve infiltration or filtration.
C. French Drains And Soak Away Pits: Rock filled trenches that promote rapid infiltration or filtration.
D. Green Roofs: Vegetated roofs that reduce runoff, improve energy efficiency, and create a green amenity.
E. Microbasins: Small depressions to create longer flow paths or localized depressions to encourage longer standing water periods and infiltration or filtration.
F. Permeable Pavements: Open graded, permeable asphalt pavement; open cell unit pavers; and porous concrete – typically used in parking lots and low traffic areas – to provide storage space and another infiltration or filtration route for stormwater.
G. Rainwater Harvesting Systems: Cisterns and rain barrels that harvest water from roof drains and downspouts for landscape watering and nonpotable uses.
H. Sidewalks And Drives Sloped Toward Open Space: A tool to provide water for site vegetation, which slows surface water flow, improving infiltration. This technique eliminates the need for curbs, gutters, and catch basins, and the open space slows the transport of untreated water and associated pollutants while reducing construction costs.
I. Bioswales: Vegetated swales with amended soil backfill and underdrains to improve infiltration or filtration.
J. Native Plantings: Use of native plants to reduce the need for irrigation and reduce runoff. Native plants also slow runoff and improve infiltration or filtration with their deep, fibrous root systems.
K. Open Water Features: To reduce runoff through evapotranspiration, improve habitats, and create attractive community amenities.
L. Rain Gardens: Landscape depressions filled with amended, permeable soil and native, deep rooted, moisture tolerant plants to promote infiltration or filtration.
M. Swales: Serpentine, vegetated drainageways that convey water slowly and improve infiltration or filtration.
N. Trees And Other Plantings: Landscaping to intercept rainfall, reduce erosion, improve infiltration or filtration, slow runoff, and reduce peak flows.
O. Tree Filters: Systems that divert a portion of parking lot stormwater from gutters into tree planters, where water infiltrates amended soils and surrounds plant roots.
P. Vegetative Buffers: Bands of native plantings that intercept runoff from developed areas before it reaches detention basins or natural watercourses (for pretreatment).
SITE LANDSCAPING
Reduced Lot Grading/Rain Gardens
Native Landscape/Vegetative Buffers
Green Road Medians
Vegetative Buffer Strip
(Ord. 52-09, 10-19-2009; amd. Ord. 2-23, 1-17-2023)
Parking decks and ramps shall be designed in compliance with these design standards in order to appear compatible with and similar to other nonresidential buildings:
A. The ground floor facade abutting any public street or sidewalk shall be designed and architecturally detailed to resemble a commercial or office building.
B. Where possible, the ground floor abutting a public street or sidewalk should include commercial or office uses.
C. The design of upper floors shall ensure that sloped floors do not dominate the appearance of the facade.
D. Windows or openings shall be provided that mimic those of nearby buildings. (Ord. 52-09, 10-19-2009; amd. Ord. 2-23, 1-17-2023)
A. All parking lots and driveways shall be hard surfaced. Parking on gravel, dirt or unreinforced turf is prohibited.
B. Parking lot edges and planting islands may be defined by concrete curb and gutter and/or incorporate approved biofiltration methods. Parking spaces shall be defined with painted striping or other approved methods.
C. Off street parking shall be located to the rear and/or side of buildings, when practical. When parking or parking access must be located in the front yard, a landscaped buffer shall be provided.
D. Parking bays in excess of eleven (11) spaces in length shall provide landscaping at the ends of each aisle in accordance with subsection 16-13-4-6C of this chapter. Parking bays in excess of twenty (20) spaces in length shall be divided by intermediate landscaped islands, and provide landscaping at the ends of each aisle.
E. Where perpendicular parking spaces are used, the space adjacent to the closed end of an aisle shall be a minimum of ten feet (10') wide.
F. An adequate driveway throat length shall be provided to minimize traffic conflicts; the driveway throat length shall be the distance between the street and the parking lot served by a driveway. Parking spaces shall not be permitted within the driveway throat. Driveway throat lengths for commercial and industrial uses shall be determined by the city engineer.
G. Parking spaces shall be provided and located as required by the ADA standards for accessibility.
H. Parking lots which will be developed in phases require a phasing plan to identify all current and future parking lot requirements. Parking areas should be constructed incrementally to match land use build out schedules. (Ord. 52-09, 10-19-2009; amd. Ord. 2-23, 1-17-2023)
A. Bicycle parking shall be required in accordance with section 16-14-9 of this title.
B. Bicycle parking spaces shall be at least as close as the closest automobile space, except for accessible parking spaces, or as near a regularly used building entrance as possible without interfering with pedestrian traffic.
C. Bicycle parking areas shall provide a minimum clearance between parked bicycles and adjacent walls, poles, landscaping, and pedestrian walkways of at least three feet (3'), and a minimum clearance between parked bicycles and vehicle parking spaces and drive aisles of at least five feet (5'). (Ord. 52-09, 10-19-2009; amd. Ord. 60-10, 11-15-2010; Ord. 2-23, 1-17-2023)
The location and design of parking lot lighting shall conform to the following:
A. All surface parking lot lighting shall be designed, installed and maintained so that no light sources shall provide illumination onto adjacent lots, buildings or streets in excess of one foot-candle;
B. All exterior lighting luminaries shall be designed and installed to shield light from the luminaire at angles above seventy two degrees (72°) from vertical;
C. Fixtures mounted on a building shall not be positioned higher than the roofline of the building;
D. Wooden utility type poles are acceptable only for temporary use during construction; and
E. All electrical service lines to posts and fixtures shall be installed underground and concealed inside the posts. (Ord. 52-09, 10-19-2009; amd. Ord. 2-23, 1-17-2023)
A. The standard size parking stall should be at least nine feet (9') wide and eighteen feet (18') long.
STANDARD SIZE CAR REQUIREMENTS (AASHTO STANDARD)
Degree Of Angle | Stall Width (A) | Curb Length (B) | Stall Depth (C) | Stall Length (D) | Aisle Width One-Way/ Two-Way (E) | Island Width (F) |
0° | 8.5' | 23' | n/a | n/a | 13'/24' | n/a |
45° | 9' | 12.7' | 19.8' | 19' | 13'/13' | 33.2' |
60° | 9' | 10.4' | 21' | 19' | 18'/18' | 37.4' |
90° | 9' | 9' | 18' | 18' | 24'/24' | 36' |
B. If parking stalls for compact cars are allowed, the stall dimensions should be at least seven feet six inches (7'6") wide and sixteen feet (16') long.
STANDARD COMPACT CAR REQUIREMENTS
Degree Of Angle | Stall Width (A) | Curb Length (B) | Stall Depth (C) | Stall Length (D) | Aisle Width One-Way/ Two-Way (E) | Island Width (F) |
0° | 7.5' | 16' | n/a | n/a | 13'/24' | n/a |
45° | 8' | 11.3' | 17' | 16' | 13'/13' | 28.3' |
60° | 8' | 9.2' | 17.8' | 16' | 18'/18' | 31.7' |
90° | 8' | 8' | 16' | 16' | 24'/24' | 32' |
(Ord. 52-09, 10-19-2009; amd. Ord. 2-23, 1-17-2023)
A. Continuous sidewalks a minimum of four feet (4') wide shall be provided in compliance with section 10-1-2 of this code.
B. Clearly defined and lighted pedestrian walkways shall extend between parking areas and all building entrances.
C. All sidewalks and walkways shall meet the ADA standards for accessibility. (Ord. 52-09, 10-19-2009; amd. Ord. 18-13, 3-18-2013; Ord. 2-23, 1-17-2023)
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