Chapter 18.50
LOW DENSITY SUBURBAN RESIDENTIAL DISTRICT (LDSR)
Sections:
18.50.020 Permitted uses within LDSR.
18.50.030 Development standards within LDSR.
18.50.040 Street plan within LDSR.
18.50.050 Drainage plan within LDSR.
18.50.010 Purpose of LDSR.
The low density suburban residential district (LDSR) is established to provide an alternate zoning for residential areas designed with lots large enough to provide for:
(a) The possibility for on-site storm water retention.
(b) Off-street parking.
(c) The possibility for on-site sewage disposal.
(d) Access driveways with drainage culverts, thereby eliminating the need for curb and gutter and wider streets with on-street parking. [Ord. 834, 2022; Ord. 755 § 1, 2010. Formerly 18.25.010.]
18.50.020 Permitted uses within LDSR.
(a) Uses Not Requiring a Special Permit.
(1) Permanent single-family dwellings. This specifically does not include duplexes, townhouses, condominiums, or other structures which share common construction elements.
(b) Uses Requiring a Special Permit.
(1) Dwellings occupied by more than one family (for attached separate ownership residences the planning commission can include in conditions of approval that there is no property line setback required for interior common lot lines; however, required setbacks are still applicable for front, rear and exterior lot lines).
(2) Churches.
(3) Schools.
(4) Childcare facilities.
(5) Parks.
(6) Recreation areas.
(7) Hospitals and health care facilities.
(8) Offices.
(c) Accessory Uses. Accessory uses are those clearly incidental to the use of the principal building within the district. [Ord. 834, 2022; Ord. 755 § 2, 2010. Formerly 18.25.020.]
18.50.030 Development standards within LDSR.
(a) No individual wells allowed.
(b) Minimum lot size shall be as follows:
(1) With On-Site Sewage Disposal. One acre and the development plan will demonstrate that the limit of on-site sewage treatment facilities including septic tanks and absorption fields shall be no closer than 50 feet from the property lines.
Lots larger than one acre may be required depending on the determination of adequacy of the soil in the engineering design report required for this option.
If individual lot on-site sewage disposal is proposed, the developer will provide public sewer main extensions across the proposed subdivision as required to provide the option for adjoining property to use the town’s public sewer.
The governing body must approve any on-site sewage disposal within LDSR.
(2) With Public Sewer Provided. One-half acre with a minimum street frontage of 100 feet onto a dedicated public road.
(c) Maximum height is subject to fire protection capabilities.
(d) Minimum width of lot at setback line shall be 100 feet.
(e) Setback requirements shall be as follows:
(1) Front yard: 25 feet (7.6 meters).
(2) Side yard: 12 feet (3.7 meters).
(3) Rear yard: 25 feet (7.6 meters). [Ord. 834, 2022; Ord. 755 § 3, 2010. Formerly 18.25.030.]
18.50.040 Street plan within LDSR.
Development plans along any Wheatland Flats county roads within city limits will provide for additional right-of-way to extend a minimum of 40 feet from the section line except for instances where this additional right-of-way would encroach into the 25-foot front yard setback for existing residential dwellings. In this case the subdivision plan will provide an additional 20-foot-wide utility easement along the existing old county road right-of-way except where this additional 20-foot-wide easement would extend closer than five feet to the closest point on the existing dwelling.
(a) Minimum right-of-way requirement shall be as follows:
(1) All interior roads within the proposed subdivision shall be a minimum 60 foot right-of-way width.
(b) Pavement requirements shall be as follows:
(1) For lots abutting existing paved county roads within the city limits no widening of the existing pavement is required.
(2) No curb and gutter or sidewalk is required.
(3) Drainage facilities including culverts under driveways will be provided as identified in the required drainage report to be prepared by a licensed civil engineer.
Driveways shall be a minimum 12 feet wide tops at property line and shall have minimum 15-foot radius pavement wraps onto the street shoulders. Driveways shall be hard surface paved from the street to the street right-of-way boundary. Drainage culverts under driveways shall be of a minimum length to extend past slopes into the borrow ditch not steeper than 3:1.
(4) Where lots abut interior dedicated public roads, the streets shall have a minimum 22-foot-wide hard surface pavement. This pavement may be concrete or asphalt. The pavement cross-sections shall be a minimum six-inch-thick Portland cement concrete or a minimum three-inch-thick hot-mix asphaltic concrete on a minimum four-inch-thick crushed rock base. These are minimum pavement cross-sections and may require additional thickness in areas of poor sub-grade bearing capacity with an equivalent CBR ratio of less than 15.
Alternate hard surface paving plans may be approved based on engineering and geotechnical reports substantiating the adequacy and serviceability of an alternate hard surface paving plan. [Ord. 834, 2022; Ord. 755 § 4, 2010. Formerly 18.25.040.]
18.50.050 Drainage plan within LDSR.
Any drainage plan shall be prepared by a licensed civil engineer and shall specify specific drainage culvert sizes where required and shall demonstrate that no additional storm water runoff from the 100-year design storm event will collect beyond the proposed subdivision limits. Whenever the subdivision plan includes on-site storm water retention on individual lots and/or whenever the subdivision plan includes on-site sewage disposal on individual lots, these conditions will be stated in bold letters on any deed transferring ownership of the lot in conjunction with the required documentation on the subdivision plat. [Ord. 834, 2022; Ord. 755 § 5, 2010. Formerly 18.25.050.]
18.50.060 Special note.
Any proposed development along the north side of East Oak Street may be subject to the proposed realignment of an arterial street parallel with and north of the existing East Oak Street.
The provisions of this chapter are not intended to eliminate or circumvent the requirements for subdivision applications with preliminary and final plat submittals and reviews as required by the town’s subdivision regulations. [Ord. 834, 2022; Ord. 755 § 6, 2010. Formerly 18.25.060.]