Specifications include, but are not limited to: Location & Topographic Survey The Engineer/Surveyor shall provide required location and topographic survey for the entire project limits suitable for planning and design. Existing right-of-way shall be surveyed and made known with the location survey and mapping deliverables, along with but not limited to, all fences, structures, utilities, signs, break-lines, and encroachments. Encroachments shall include owners name and address with perpendicular distance(s) from right of way. All surveying and mapping activities shall be performed by a qualified Professional Surveyor licensed in New Mexico and shall meet the Minimum Standards for Surveying in New Mexico (12.8.2 NMAC). The Engineer/Surveyor is responsible for establishing primary project control if not provided by the NMDOT Geodetic Unit, and shall prepare a Project Control Map per the NMDOT’s requirements. The engineer is responsible for coordinating all surveying and mapping efforts required for design and determination of right-of-way impacts due to design. The Engineer shall submit the man-hour and fee proposal for the location survey and mapping efforts to the Project Development Engineer for review by the Survey and Lands Engineering staff. Drainage Study Reports A. Preliminary Drainage Report Prior to performing a preliminary drainage study, the Engineer shall meet with the Department’s assigned Drainage Engineer to discuss the hydrologic methodologies and analysis of existing and proposed drainage structures. The Preliminary Drainage Report shall summarize the results of the preliminary drainage analysis. The report shall include: 1. Discussion of soil types 2. Rainfall Depths and Intensities 3. Vegetation and land use distribution 4. Curve number or rational formula “C” calculations 5. Time of concentration calculations 6. Drainage area topographic map with existing structures inventory 7. Drainage basin and sub-basin areas 8. Design (50yr) and 100-year discharges and their corresponding headwater depths 9. Summary of the drainage field inspection results including District personnel (public and other local agencies) interview and drainage structure field inspection forms 10. Construction Maintenance Easement’s (CME) required to construct & maintain the structures 11. Summary table of existing and recommended drainage structure sizes and types, and identification of sources used in the analysis 12. Preliminary erosion protection and energy dissipaters design and preliminary details The preliminary hydraulics shall be computed based on existing information to provide the scope of drainage work and cost estimate. The Preliminary Drainage Report shall include preliminary design and locations of drop inlets, trunk lines, other preliminary drainage data, and dimensions of CME’s and ponds needed. Refer to Section 8 for other requirements.
