HomeMy WebLinkAboutRIVER DISTRICT BLOCK ONE MIXED-USE (ENCOMPASS) - PDP - PDP120020 - CORRESPONDENCE - PHOTOMETRIC PLAN (3)Mechanical • Electrical • Plumbing
November 15, 2012
City of Fort Collins
281 North College Ave
Fort Collins, CO 80522
Attention: Ted Shepard
Project: River District Block One Mixed Use
Subject: Site Lighting
Dear Mr. Shepard:
The current site photometric drawings are in accordance with the City of Fort Collins lighting standards.
The current City standards specify a minimum lighting level for parking and building surrounds to be
1FC minimum. To achieve the 1FC minimum, the average illumination over the parking areas will
usually be in the 2-317C range. Parking lot poles are specified to be 15' tall with full cut-off architectural
fixtures with 100W or 150W metal halide lamping. Building mounted fixtures are wall mount versions of
the parking fixtures with 70W or 100W MH lamping.
The Illuminating Engineering Society recommends lighting levels to be 0.5FC minimum for enhanced
security in parking areas with a maximum to minimum illuminance ratio of 15:1. We would suggest that
the City utilize the IES recommended levels if they want reduced light levels at the Block One site.
A lighting control system is provided to automatically control all site fixtures. The lighting controls will
be programmed to turn exterior fixtures on at dusk. Parking lot fixtures will be programmed to turn off at
10:00pm. The remaining exterior building mounted and site fixtures will be programmed to turn off at
dawn.
Should you be in agreement with the above approach for the site lighting, please let us know and we'll get
started on a revised site photometric plan.
Respectfully,
Lawrence Smith, P.E.
Principal
37127 Cullison Ridge Rd, Windsor, Colorado 80550
Phone: 970.686.1004 E-Mail: larrys@srbllc.net