1. Arterial And Collector Streets: Arterial and collector streets shall conform to the width designated on the master street plan wherever a subdivision falls in an area for which a master street plan has been adopted. For areas where the street plan has not been completed at the time the preliminary plan is submitted to the planning commission, arterial or collector streets shall be provided as required by the planning commission. The width of arterial streets shall be not less than eighty feet (80') and for collector streets not less than sixty feet (60').
2. Residential Streets: Residential streets shall have a minimum width of fifty six feet (56').
3. Cul-De-Sacs; Dead End Streets:
1. Minor terminal streets (cul-de-sacs) shall not be longer than four hundred fifty feet (450') from the centerline of the adjoining street to the center of the cul-de-sac. Each cul-de-sac must be terminated by a turnaround of not less than one hundred feet (100') in diameter. If surface water drains into the turnaround due to the grade of the street, necessary catch basins and drainage systems and easements shall be provided.
2. Where a street longer than one lot but not to exceed four hundred feet (400') is designed to remain only temporarily as a dead end street, an adequate turning area shall be provided as follows:
1. Where the street dead ends into a subsequent phase of the same subdivision, a temporary graveled eighty foot (80') diameter turnaround and a permanent easement of right of way on the property shall be required. However, if the subsequent subdivision phase is not recorded at the time of roadway paving in the preceding phase, an eighty foot (80') diameter asphalt surfaced turnaround shall be placed in the subsequent phase.
2. Where the street dead ends against property which is not part of a subsequent subdivision phase, either a bubble inside the subdivision as shown in the standard drawings, or an asphalted eighty foot (80') diameter turnaround, along with a permanent easement of right of way from the adjacent property owner, shall be placed.
4. Marginal Access Streets: Marginal access streets of not less than forty feet (40') in width shall be required paralleling all limited access major streets, unless the subdivision is so designated that lots back or side onto such major streets.
5. Streets Along Subdivision Boundary: Streets along a subdivision boundary shall be constructed to city standards, except that at the recommendation of the planning commission and with the approval of the city council, the right of way line may be contiguous with the back of the curb.
6. Partial Streets: Partial street right of way width shall be considered by the city council only when the right of way width exceeds one hundred feet (100'). However, the city council may grant a partial right of way of a width equal to the width of the right of way as defined by the standard roadway section, sheet no. 1 of the subdivision standard drawings, less a distance of not more than nine feet (9').
7. Standard Street Sections: All proposed streets, whether public or private, shall conform to the city street cross section standards as now or hereafter adopted by the city council.
8. Street Grades: Except where special circumstances exist, street grades over a substantial length shall not exceed the following percentages: on major public streets, eight percent (8%); on minor and collector streets, twelve percent (12%). Street grades shall be a minimum of one-half percent (0.5%), except as allowed by the city engineer. The cross slope of the street cross section is defined on sheet no. 1 of the standard drawings. The maximum difference in curb elevations shall not exceed one foot (1'), and then only with the approval of the city engineer.
9. Alleys: Alleys shall have a minimum width of twenty six feet (26'). Alleys may be required in the rear of business lots, but will not be accepted in residential blocks except under the unusual conditions where such alleys are considered necessary by the planning commission.
10. Bridges: Design and construction of new bridges, whether essential for the overall circulation plan of the city or required only to serve a subdivision, shall be approved in advance by the city. For bridges identified as essential structures, the city may participate on a fifty-fifty (50-50) basis, and in the case of a bridge required to serve only a subdivision, the subdivider shall pay the total cost of construction. The subdivider shall comply with all the conditions of the city bridge policy.
11. Protection Strips:
1. Where the subdivision streets parallel contiguous property of other owners, the subdivider may retain a protection strip of not less than one foot (1') in width between the street and adjacent property. Protection strips will be allowed only at the discretion of the city council, after recommendation of the planning commission, and in accordance with all city ordinances. An agreement with the city, approved by the city attorney, shall be made by the subdivider, contracting to dedicate the one foot (1') or larger protection strip free of charge to the city for street purposes upon payment by the present owners of the contiguous property to the subdivider of a consideration named in the agreement.
2. Such consideration should be equal to the cost, at the time of the agreement, of the street improvements properly chargeable to the contiguous property, plus the value of the land from the right of way line to the centerline of the street at the time of the agreement, together with interest at a fair rate from the time of agreement until the time of subdivision of such contiguous property. All changes to be associated with the protection strip, as well as the interest rate, shall be recorded as part of the aforementioned agreement. All property owned by the subdivider shall be included on both the preliminary and final plat.
12. Excavations And Fills: Subdivision development adjacent to natural drainage channels, or within any marsh or wetlands which will result in any discharge of excavated or fill materials, may require obtaining a permit from the U.S. corps of engineers prior to the issuance of local permits for deposition of fill material into any wetland or stream channel. This determination shall be made as part of the preliminary plat staff review. (Ord. 86-3, 3-11-1986)