Resolution No 36-2021 - Adopting Revised Construction Standards and Specifications

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SECTION 2 – STREETS, WALKWAYS & PATHS 13 2-2.12 PRIVATE STREETS Private streets should be developed in accordance with current Green Book and IMUTCD standards, and will not be maintained by the City of South Bend. Intersections of private streets with City streets are subject to the policies within this document and require approval by the City Engineer prior to construction within the City Right-of-Way. 2-2.13 RIGHT TURN LANES Right turn lanes shall be provided where traffic studies indicate they are warranted and/or where directed by the City Engineer. Design shall comply with the relevant sections of the IDM, Green Book, and IMUTCD. 2-2.14 CUL-DE-SACS Cul-de-sacs are required at the termination of dead-end streets and shall comply with the appropriate City Standard Drawing. The geometry should be designed to accommodate an SU design vehicle. 2-2.15 SHARED USE PATHS / BICYCLE FACILITIES Shared use paths and bicycle facilities shall comply with Chapter 307(51) of the IDM. Bicycle racks, benches, lighting, and trail marking signs should be considered as appropriate and coordinated with the Department of Community Investment. Architectural elements require approval by the City Engineer. 2-3 SUBGRADE CONDITIONS AND TREATMENT Subgrade Preparation shall comply with the requirements of Section 207 of the INDOT Standard Specifications, except as follows: The natural soil in place may qualify as SUBBASE when the following conditions are met: a.Borings - A soil boring at intervals not to exceed 200 lf. (lineal feet) is taken within the limits of construction. The boring shall extend three (3) feet below the natural ground. b.Gradation - The soil sample shall be screened for compliance with one of the gradations tabulated in INDOT section 903.04. For the determination of the material passing the Size No. 200 sieve, the sample shall be thoroughly washed and the amount of Loss through Decantation shall be determined. The final gradation of the materials shall comply with the requirements as set forth in INDOT section 903.04 (b). c.Analysis - The analysis of the existing material shall be submitted to the Engineer with the signature and seal of a registered professional engineer. The final determination for use of the material as SUBBASE shall be made by the Engineer. Subgrade treatment types are defined as follows and are further described in the INDOT Standard Specifications: Type I twenty-four (24) inches of soil compacted to density and moisture requirements. Type IC twelve (12) inches of the subgrade excavated and replaced with coarse aggregate No. 53.