Calvin, Giordano & Associates, Inc.

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City of Sunny Isles Beach | RFQ No. 20-07-01 | Continuing Professional Consulting Services (CCNA) The proposed approach for a lighting project will consist of a five-step process involving: (1) Night-time assessment and documentation of existing conditions; (2) Preliminary design and fixture selection; (3) Design development; (4) Final Design; (5) Engineering support during bidding and construction phases. A. Night-time assessment of existing conditions: In any lighting project, one of the most important steps is to understand the current conditions for the given site. The proposed night-time assessment will allow the engineer to observe the current lighting conditions and determine any problem areas, impacts of physical obstructions such as trees, and the overall quality and appropriateness of the existing lighting facilities. The engineer will take readings with a calibrated light meter throughout the areas of interest (typically at 10’ to 20’ intervals) that will later be compared to the photometric software simulation results of the same areas. The results of the night- time assessment will be utilized to create an existing conditions site photometric plan. The observed vs. simulated data comparison is important because it provides a realistic picture of the lighting conditions by emphasizing the effect of actual obstructions that are, typically, not accounted for in the photometric software simulation alone. This allows the engineer to ascertain the site areas and lighting system elements that will require additional attention in the design process. B. Preliminary design and fixture selection: The focus of the preliminary design approach will be to utilize the existing poles at the site, if desired and possible, and consider light fixture retrofit options using Light Emitting Diode (LED) technology. The advantages of LED technology include lowered energy consumption, longer fixture lifetime (lowered maintenance / re-lamping costs), and improved lighting performance via perceived and verifiable results. If their will be a high level of pedestrian traffic through the project area, LED fixtures with vandal resistant features may be the preference. In addition to the conventional pole-mounted fixtures, the incorporation of bollard lighting may be an option for some projects. This type of lighting will be beneficial in areas of extreme canopy cover where much of the light from the primary light poles is being blocked. The goal of the preliminary lighting design will be to meet security lighting standards as defined by the Illumination Engineering Society of North America (IESNA) as well as any local ordinances regarding light levels and lighting spillover at the property line. Our electrical engineering staff will provide photometric simulations with the various LED fixtures selected for consideration and will work with the staff to review the results and assist in making a decision on the best possible fit for the project. C. Design development: Once the appropriate fixture (or set of fixtures) has been chosen by the City, the engineer will update the design and perform the load calculations and circuiting design for the project. The electrical power distribution source will be reviewed and discussion with FPL will begin. For the lights to be retrofitted, the engineer will determine the adequacy of the existing wiring to support the revised loads. For lights that will require new poles, the electrical feed will be sized to handle not just the presently proposed lighting loads, but also any future lighting enhancements that may be desired. Coordination with other disciplines involved in the project must occur during this phase to make sure any proposed light pole locations are coordinated with proposed landscaping, do not impact ADA access or improvements, and power requirements are coordinated. Project Approach and Understanding - Electrical Engineers 11