1995.05.15 ORD 1995-299 - Laserfiche WebLink

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. ` ` . Subd . D. General Construction Standards. Wherever feasible, the City shall construct or improve its streets and roads to the standards listed below: ( 1 ) Pavement design shall be in accordance with the MNDOT Road Design Manual . Streets shall be designed in accordance with the cumulative design lane 18 KIP E.S.A.L. The minimum road section shall be in accordance with exhibits "A" through "F" of this ordinance, or as determined by the City Engineer. (2) Soil borings shall be taken along the proposed street centerline at intervals not exceeding 300 feet, and shall be a part of all street plans. (3) The proposed R-Value used for pavement design shall be shown on all street plans. (4) The subgrade shall be scarified to one foot depth and recompacted on all cut sections. ( 5) The required density below the upper three feet of subgrade shall be either 95% of the Standard Proctor Density (T-99) ASTM D-698 or 90% of the modified Proctor Density (T-180) . (6) The required density in the upper three feet of subgrade shall be either 100% of the Standard Proctor Density (T-99) ASTM D-698 or 95% of the modified Proctor Density (T-180) . (7) Test rolling per MNDOT 2111 is required on the subgrade using a loaded dump truck delivering nine ton axle load . (8) Street horizontal centerline alignment deflection angles greater than ten degrees shall be connected by a curve with a radius of not less than 250 feet. (9) The minimum centerline gradient shall not be less than one-half percent (0.5%) . ( 10) The maximum centerline gradient shall not exceed: a. Eight percent (8%) for minor and marginal access streets. b. Five percent ( 5%) for thoroughfares and collector streets. ( 11 ) Vertical curves shall be designed in accordance with the MNDOT Road Design Manual . Said specifications shall apply for stopping sight distances on crest curves and for headlight sight distances on sag curves.