(A) Contiguous streets. Except for cul-de-sacs, streets shall connect with streets already dedicated in adjoining or adjacent subdivisions, or provide for future connections to adjoining unsubdivided tracts, or shall be a reasonable projection of streets in the nearest subdivided tracts. The arrangement of arterials and collector streets shall be considered in their relation to the reasonable circulation of traffic, to topographic conditions, to runoff of storm water, to public convenience and safety, and in their appropriate relation to the proposed uses of the area to be served and in compliance with the Comprehensive Plan.
(B) Local streets and dead-end streets. Local streets should be so planned as to discourage their use by non-local traffic. Dead-end streets are prohibited, but cul-de-sacs shall be permitted where topography or other physical conditions justify their use. Cul-de-sacs shall not be longer than 500 feet, including a terminal turnaround which shall be provided at the closed end, with a right-of-way radius of not less than 50 feet. A 42-foot street surface radius will be required on all cul-de-sacs.
(C) Street plans for future subdivisions. Where the subdivision to be submitted includes only part of the tract owned or intended for development by the applicant, a tentative plan of a proposed future street system for the unsubdivided portion shall be prepared and submitted by the applicant. When determined necessary by the city, the plan shall extend streets and utilities to the property line of the adjacent tract and/or tracts.
(D) Temporary cul-de-sacs. In those instances where a street is terminated pending future extension in conjunction with future subdivision, a temporary turnaround facility shall be provided at the closed end, in conformance with cul-de-sac requirements.
(E) Subdivisions abutting major rights-of-way. Wherever the proposed subdivision contains or is adjacent to the right-of-way of a U.S. or state highway or county thoroughfare, provision may be made for a marginal access street approximately parallel and adjacent to the boundary of the right-of-way; provided, that due consideration is given to proper circulation design, or for a street at a distance suitable for the appropriate use of land between the street and right-of-way. The distance shall be determined with due consideration of the minimum distance required for approach connections to future grade separations, or for lot depths.
(F) Trails. Trails shall be established in accordance with the City's Comprehensive Park, Trail and Open Space Plan, and in other areas where trails will serve an important transportation or recreational purpose as recommended and approved by the City Council. Trail corridors shall meet the following minimum requirements unless otherwise permitted by the City Council:
(1) Dedicated to the city as an easement for public trail purposes;
(2) Minimum 30-foot wide corridor;
(3) Minimum eight-foot wide surface;
(4) Handicap accessibility wherever possible;
(5) No above-ground utilities (i.e. lift stations, utility boxes) may be within the trail corridor;
(6) A landscape plan, including shrubs and trees, shall be required on trail corridors located in the side yard of residential lots. These landscape plantings shall be in addition to those required by § 155.031 of this code;
(7) Due regard shall be shown for trees, wetlands and other environmental features when locating and constructing trails.
(G) Service access, alleyways. Except within the city's Downtown Business District, service access and alleys shall be prohibited. Where provided, alleys shall not be less than 25 feet in width. Dead-end alleys shall be avoided wherever possible, but if unavoidable, such dead-end alleys may be approved if adequate turnaround facilities are provided at the closed end.
(H) Compliance with city, county and state transportation plans. All subdivisions adjacent to or incorporating planned streets which are identified in the city, County and State Transportation Plans, as amended, or existing streets shall comply with the minimum right-of-way, surfaced width and design standards as outlined in the plans or as recommended by the City Engineer.
(I) Street design. Minimum right-of-way widths, paving widths, angles of intersection, curb radii, distances along sides of sight triangles, horizontal alignments, vertical alignments, as well as maximum grades shall be in accordance with the following table:
Street Design
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Design Element
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Minor Arterial Collector | Major Collector | Minor Collector | Local Streets | Cul-de-Sacs | Alleys
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Street Design
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Design Element
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Minor Arterial Collector | Major Collector | Minor Collector | Local Streets | Cul-de-Sacs | Alleys
|
Right-of-way width | 150 - 200 ft. | 100 - 150 ft. | 80 - 100 ft. | 50 - 66 ft. | 50 ft./50 ft. R | 25 ft. |
Paving width* | 88 ft. | 56 ft. | 38 ft. | 34 ft. | 34 ft./42 ft. R | 20 ft. |
Maximum grade | 7.5% | 7.5% | 7.5% | 7.5% | 7.5%/7.5% R | 7.5% |
Minimum grade | 0.5% | 0.5% | 7.5% | 0.5%/0.5% R | 0.5% | |
Cross grade | < ................... 2 - 3% Crown ..................... > | |||||
Design section | 10 ton | 9 ton | 9 ton | 9 ton | 9 ton | 9 ton |
Minimum angle intersection | 90 | 90 | 80 | 70 | 70 | 70 |
Minimum curb radius | 65 ft. | 50 ft. | 35 ft. | 20 ft. | 15 ft. | — |
Grades for 25 feet before intersection | 3.0% | 3.0% | 3.0% | 3.0% | 3.0% | 3.0% |
Site triangles (distance along sides of) through street/stop street | 650 ft. /30 ft. | 500 ft. /30 ft | 500 ft. /30 ft. | 250 ft. /30 ft. | 250 ft. /30 ft. | 50 ft. /25 ft. |
Horizontal align (min. radius of center line) | 1,350 ft. | 850 ft. | 450 ft. | 215 ft. | 75 ft. | 100 ft. |
Vertical curves (min. sight distance) | 650 ft. | 475 ft. | 325 ft. | 250 ft. | 100 ft. | 100 ft. |
NOTE: Right-of-way requirements may be increased for specific thoroughfares if existing or anticipated traffic flow warrants it to accommodate trails and sidewalks, or if drainage easements parallel such thoroughfares. Increased width will be set by the City Council upon recommendation of the Planning Commission and City Engineer. * As measured from back of curb to back of curb. | ||||||
(J) Streets in flood hazard area. No street shall be approved if its final surface is at a lower elevation than two feet below the regulatory flood protection elevation. The City Council may require profiles and elevations of finished streets for areas subject to flooding. Fill may be used for streets, provided such fill does not unduly increase flood heights and provided any such fill would not result in a stage increase violating the requirements of M.S. Chapters 104 and 105, as such chapters may be amended, supplemented, or replaced from time to time, and any applicable requirements imposed by the Federal Emergency Management Agency pursuant to its rules and regulations. Drainage openings shall not restrict the flow of water so as to unduly increase flood heights, and provided any such drainage opening would not violate the requirements of M.S. Chapters 104 and 105, as such chapters may be amended, supplemented, or replaced from time to time, and any applicable requirements imposed by the Federal Emergency Management Agency pursuant to its rules and regulations.
(K) Reverse curves. Minimum design standards for major collector streets shall comply with Minnesota Department of Transportation State Aid Standards.
(L) Reserve strips. Reserve strips controlling access to streets shall be prohibited except under conditions accepted by the City Council.
(M) Private streets. Private streets and reserve strips, except in the case of planned unit developments, shall be prohibited and no public improvements shall be approved for any private street. All streets shall be dedicated for public use. If any person applies to subdivide or replat any land or parcels adjoining an existing private street, they shall be required to dedicate the private street for public use and schedule for improvement to public street standards at the time of final plat.
(N) Street intersections. Intersections having more than four corners shall be prohibited. Adequate land for future intersections and interchange construction needs shall be dedicated. Angles formed by the intersection of two streets shall comply with the provisions of division (I) above.
(O) Street intersection offsets. Street intersection jogs with center line offsets of less than 125 feet shall be prohibited.
(P) Center line curvature. The minimum horizontal curvature of streets shall be in accordance with the MNDOT Highway Design Manual for the type of street and design speed. The minimum curvature shall be 250 feet radius.
(Q) Half streets. Half streets shall be prohibited except where it will be practical to require the dedication of the other half when the adjoining property is subdivided, in which case the dedication of a half street may be permitted. The probable length of time elapsing before dedication of the remainder shall be considered in this decision. No permanent street improvement shall be permitted within a half street right-of-way. All lots having frontage or access solely from a half street are prohibited from being eligible for building permits.
(R) Dedication. All proposed streets shown on the subdivision shall be in conformity to city, county, and state plans and standards and be offered for dedication as public streets unless otherwise determined by the City Council.
(S) Curbs and gutters. Concrete curbs and gutters shall be required on all streets, except in the Rural Residential (RR) District or unless otherwise directed by the City Council at the time the subdivision is approved.
(T) Pavement.
(1) The base course shall consist of the latest Minnesota Department of Highways approved material, having a thickness of not less than eight inches. The City Engineer shall have the right to determine whether this thickness is adequate for the site conditions and type of street that has been proposed.
(2) Pavement shall be required on all streets within a subdivision, and for all streets providing access to the subdivision from at least one direction. If the street is blacktopped, it must be constructed with a minimum of 21/2-inch layers of Minnesota Highway Department 2331 bituminous. If the street is constructed with concrete, the proposed pavement design must first be approved by the City Engineer.
(3) Street shoulders shall be constructed which are uniformly and thoroughly compacted by rolling and level with the tops of curbs.
(Ord. 111, passed 12-23-97; Am. Ord. 0605, passed 7-25-06; Am. Ord. 0903, passed 10-27-09; Am. Ord. 1603, passed 3-8-16; Am. Ord. 1806, passed 10-23-18) Penalty, see § 154.999