§ 51.100  STORM DRAINAGE FEE.
   (a)   The purpose of this subchapter is to establish a charge against real property within the city for the operation, maintenance, and capital expenses of the storm drainage system. The storm drainage system includes the storm drainage pipe network, storm drains, drainageways, the levee diversion (Flood Risk Reduction Project), Big Sioux River, and Skunk Creek within the city.
   (b)   (1)   All real property, except property owned by cemetery corporations unless exempted by state law, within the city shall be charged an annual storm drainage fee for the operation, maintenance, and capital improvements of the storm drainage system.
      (2)   Storm drainage fee for the parcel is determined by the runoff weighting factor, multiplied by parcel area (in square feet), multiplied by unit financial charge (in dollars per square feet).
         A.   Runoff weighting factor.
            1.   The runoff weighting factor is determined by the type of land use for the parcel, and indicates the relative volume of storm water runoff from a land parcel, as a function of the percentage of impervious surfaces covering each land parcel. The runoff weighting factor is to be assigned by land use type, as shown in Table I.
 
Table I*
Land Use Code
Land Use
Runoff Weighting Factor
12
Duplex
7.5
13
Town houses
7.5
14
Apartment building (1—3 stories)
11.25
15
Apartment building (4 stories or more)
11.25
16
Dormitories
11.25
17
Mobile homes and trailers
11.25
18
Other residential
11.25
21
Apparel and textiles
17.0
22
Wood, furniture, fixtures
17.0
23
Lumberyards
17.0
24
Printing and publishing
17.0
25
Warehouse, indoor storage
17.0
26
Electronic, scientific, optical
17.0
27
Construction yards, including plumbing, electrical, heating contractors
17.0
28
Chemical, petroleum storage
17.0
29
Other light, pollution-free manufacturing not included elsewhere
17.0
31
Food, agricultural processing, stockyards, rendering
17.0
32
Paper and pulp
17.0
33
Chemical, petroleum, rubber and plastic
17.0
34
Stone, glass, clay, cement, brick
17.0
35
Primary metal, smelting
17.0
36
Metal fabricating
17.0
37
Salvage, junkyard, resource recycling
7.5
38
Other heavy manufacturing not elsewhere coded
17.0
41
Bus, railroad yards, terminals, right-of-way
5.0
42
Airport
5.0
43
Auto parking ramps and lots (commercial or public only—not auxiliary parking)
18.75
44
Highway and street right-of-way
5.0
45
Communication (TV, radio, and the like)
17.0
46
Utilities (gas, sewer, water, telephone, and the like)
17.0
47
Truck terminal
17.0
48
Military base
17.0
49
Other transportation, communication and utilities not elsewhere coded
17.0
51
Wholesale—food, produce
18.75
52
Wholesale—other
18.75
53
Extensive retail—building supplies, including lumber, home repair supplies
18.75
54
Extensive retail—farm equipment and implements
18.75
55
Extensive retail—new and used car dealers
18.75
56
Extensive retail— recreational vehicles, marine
18.75
57
Extensive retail—tires, batteries, auto accessories
18.75
58
Extensive retail—auto repair, body shop
18.75
59
Extensive retail—other retail with outside storage
18.75
61
Food store
18.75
62
Neighborhood commercial, hardware, drugs, Laundromat, beauty shop, barbershop, neighborhood shopping center
18.75
63
Gasoline, auto service station
18.75
64
Department store, discount store, regional shopping center
18.75
65
Clothes and apparel
18.75
66
Specialty retail—jewelry, gifts, and the like
18.75
67
Furniture, household appliances
18.75
68
Other retail not elsewhere coded
18.75
71
Banks and financial institutions
18.75
72
Churches
11.25
73
Nursing homes and hospitals
11.25
74
Colleges and universities, adult education
11.25
75
Primary and secondary education
11.25
76
Day care centers
11.25
77
Medical offices, clinics
18.75
78
Government offices
18.75
79
Offices not elsewhere coded (real estate, law, and the like)
18.75
81
Cultural activities—libraries, museums, and the like
18.75
82
Assembly areas, arenas, stadiums
18.75
83
Theaters
18.75
84
Restaurants, bars, lounges
18.75
85
Hotels, motels, resort lodging
18.75
86
Public parks, golf courses, fairgrounds
1.0
87
Private country club and other recreational uses
1.0
88
Other cultural and entertainment uses, not elsewhere coded
1.0
91
Cropland and farms
1.0
92
Feedlots
1.0
93
Grasslands
1.0
94
Mining and quarrying**
1.0
95
Cemetery
0.0
96
Sanitary landfills
1.0
97
Vacant
1.0
98
Under construction
1.0
99
Other not elsewhere coded
1.0
110
Single-family (parcel area less than 30,000 square feet)
7.5
110
Estate (parcel area of 60,000—100,000 square feet)
3.5
110
Estate (parcel area greater than 100,000 square feet)
2.5
111
Single-family (parcel area of 30,000—60,000 square feet)
5.75
*    Parcels included in the regulatory floodway shall be assigned a runoff weighting factor of zero for the actual regulatory floodway area.
**    Quarries are individually calculated with a runoff weighting factor of zero for the actual quarry area.
 
            2.   Upon written request from a property owner, a detailed site study of the parcel will be conducted by the city engineering department to redetermine the runoff weighting factor. This written request must be submitted to the director on or before April 30 of the year the fees are charged to the subject parcel. The engineering department shall calculate the percentage of impervious area for the subject parcel which contributes storm water runoff to the storm drainage system of the city. The runoff weighting factor is then redetermined through utilization of Table II. The detailed site study to redetermine the runoff weighting factor shall be completed by July 1 of the year the written request is submitted in accordance with this paragraph.
 
Table II
Percentage Impervious Area
Average Runoff to Rainfall Ratio (Rv*)
Runoff Weighting Factor (Rv × 25)
0
0.04
1.0
10
0.19
4.75
15
0.26
6.5
20
0.30
7.5
30
0.38
9.5
40
0.45
11.25
50
0.53
13.25
60
0.60
15.0
70
0.68
17.0
80
0.75
18.75
90
0.83
20.75
100
0.90
22.5
*   These values are derived from the “STORM” equation (figure 5-20, page 5-49), A Statistical Method for the Assessment of Urban Storm Drainage, EPA, Washington, D.C., January 1979. For low percentage impervious surfaces (0% to 20%), a linear relationship was assumed between the “STORM” equation and empirical data derived from drainage runoff in high depression storage, loose soils, and flat areas.
 
            3.   Interpolation of the runoff weighting factor for a given percentage of impervious area not listed in Table II shall be determined by linear relationship between the values listed in Table II.
            4.   The director may direct that the runoff weighting factor for a given parcel be redetermined by a detailed site investigation and Table II, where an obvious departure from the percentage of impervious surfaces of similar land uses exists.
            5.   A redetermination of the runoff weighting factor, resulting from a detailed site investigation and Table II, brought about either by written request from a property owner or direction from the director, shall be used in the calculation of the subject parcels storm drainage fee and shall replace the runoff weighting factor previously derived from Table I, even if the resulting value is higher.
      (3)   Parcel area. Parcel area is to be obtained from the records of the Minnehaha County department of equalization and the Lincoln County assessor’s office or as calculated by city engineer.
      (4)   Unit financial charge. The unit financial charge shall be as shown in Table III below:
 
Table III
Effective Date
Unit Financial Charge
Sioux Falls Airport Authority Unit Financial Charge
January 1, 2018
0.000849
0.000326
January 1, 2019
0.000908
0.000349
January 1, 2020
0.000957
0.000368
January 1, 2021
0.001009
0.000388
January 1, 2022
0.001053
0.000405
January 1, 2023
0.001089
0.000419
 
(1992 Code, § 41-80)  (Ord. 101-82, passed 9-20-1982; Ord. 20-83, passed 4-25-1983; Ord. 83-86, passed 9-22-1986; Ord. 85-90, passed 9-4-1990; Ord. 27-93, passed 4-5-1993; Ord. 84-93, passed 12-6-1993; Ord. 110-94, passed 12-5-1994; Ord. 140-95, passed 11-6-1995; Ord. 27-98, passed 3-2-1998; Ord. 98-03, passed 10-14-2003; Ord. 15-07, passed 1-16-2007; Ord. 34-14, passed 6-17-2014; Ord. 45-16, passed 5-3-2016; Ord. 113-18, passed 12-4-2018)
Cross-reference:
   Building, see ch. 150
   Financial regulations, see §§ 36.001 through 36.005
   Streets and sidewalks, see ch. 96
   Subdivisions, see ch. 157
   Taxation, see ch. 37
   Zoning, see ch. 160