Private streets shall conform to the following construction and design requirements:
A. All private street construction shall be in accordance with the City of Hayden structural standards for streets, including compacted subgrade, ballast, base course and asphaltic concrete mat thickness, utilizing the appropriate traffic index as based upon use.
B. Construction plans shall demonstrate adequate treatment of stormwater runoff on private lands via grassy swales, or other stormwater treatment method as may be approved by the City Engineer.
C. Private streets shall be constructed in accordance with City structural standards for public streets, excepting that the minimum width of pavement, and requirements for curbs and sidewalks for private streets will be according to the following table:
Use | Lots/Units | Minimum Width Of Pavement | Sidewalk Or Path | Curbs |
Residential | 15 or fewer lots and 15 or fewer units | 24 feet | 4 feet minimum width, at least 1 side | Not required |
Residential | Greater than 15 lots or greater than 15 units | Planned unit development only (in accordance with performance standards) | ||
Commercial/ industrial | 6 or fewer lots | 26 feet, or as required to accommodate truck movement and turning radii | 5 feet minimum width, adjacent to all lots served | 6 inch vertical or rolled |
Commercial/ industrial | Greater than 6 lots | Planned unit development only (in accordance with performance standards) | ||
D. Private streets serving more than fifteen (15) residential lots or fifteen (15) residential dwelling units, and private streets serving more than six (6) commercial or industrial lots will only be permitted within planned unit developments.
E. Private streets in planned unit developments may be permitted, with flexibility in design standards related to width of pavement, curbs, sidewalks, and swales, provided that the private street meets the following performance standards:
1. Width Of Pavement: The public street standard provides adequate width for emergency vehicle access, and on street parking in residential areas. If a private street is proposed for a width of less than the public street standard, the developer must demonstrate:
a. Adequate parking has been provided in residential areas to allow for overflow (100 percent of the off street parking requirements contained within title 11, chapter 4 of this Code shall be required for residential units on streets where on-street parking is limited);
b. Adequate width to accommodate emergency vehicle access around a standing vehicle has been provided (minimum width of 24 feet on a two-way residential street, and 26 feet on a two-way commercial/industrial street with no on street parking; minimum width of 30 feet on a two-way street with parking on 1 side). Additionally, private streets serving commercial and/or industrial lots must demonstrate adequate width to accommodate truck maneuvering requirements and turning radii.
c. Developer will be required to provide and maintain "no parking" signage, as appropriate for the width of the proposed street, as part of the subdivision improvements. Enforcement of "no parking" zones shall be the responsibility of the property owners' association (as described in section 10-3-4 of this chapter).
2. Pedestrian Accessibility: The public street standard provides adjacent pedestrian access to all street frontage lots. The proposed design must provide comparable pedestrian accessibility.
3. Curb Requirements: The public street standard provides for six inch (6") vertical curbing in commercial and industrial zones, and vertical or rolled curbs in residential areas to prevent parking in the drainage swales, and/or adjacent sidewalks, to reduce the cost of future maintenance and/or extend the life of the pavement, and to enhance the aesthetics of the street. If a private street is proposed with a modified design for curbing, the developer must demonstrate that:
a. The design provides a similar degree of protection of swales and sidewalks as standard curbs;
b. The design proposed will provide continuity of design with surrounding properties and enhance the long term serviceability of the proposed development, or will otherwise enhance the aesthetics of the development.
F. All private streets longer than one hundred fifty feet (150') in length shall originate in a public right-of-way and terminate in a public right-of-way by way of a loop, or at one of the following turnaround areas if approved by the City Engineer and Fire Marshal:
1. A cul-de-sac;
2. A hammerhead/tee type turnaround;
3. Other such turnaround design as may be approved by Fire Marshal and the City Engineer upon a finding of functional equivalency to specific terminal designs as authorized by subsection F1 or F2 of this section.
G. Traffic signs required for safe pedestrian and vehicle traffic, including, but not limited to, designated parking and no parking areas, speed, stop, and such other signs as may be deemed necessary, shall be provided by the developer and maintained by the property owners' association (as described in section 10-3-4 of this chapter). All required signage shall conform to MUTCD standards. Construction drawings shall include a plan for signage for review and approval by the City Engineer.
H. Private streets shall conform to all other City of Hayden public street standards.
I. All private streets shall, during the progress of construction, be inspected and tested, at the expense of the owner or developer, by a qualified inspector, in order to ensure compliance with the construction and design standards as set forth in this section, and consistent with the construction drawings as set forth by the registered professional engineer and approved by the City Engineer, and sound engineering and construction practices. Reports of such inspections and tests shall be submitted, together with a certification of such compliance, for the review and approval of the City Engineer, prior to occupancy of any dwellings served thereby. (Ord. 559, 7-12-2016; amd. Ord. 578, 1-9-2018; Ord. 619, 4-13-2021)