§ 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, 2023	0.001089	0.000419
January 1, 2024	0.001133	0.000436
January 1, 2025	0.001178	0.000453
January 1, 2026	0.001225	0.000471
January 1, 2027	0.001262	0.000485

 

(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; Ord. 44-23, passed 6-20-2023)

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