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HomeMy WebLinkAbout5. Discussion of Street Lighting StandardsCITY OF SHAKOPEE Memorandum TO: Mayor & City Council Mark McNeill, City Administrator FROM: Bruce Loney, Public Works Director SUBJECT: Discussion on Street Lighting Standards DATE: March 22, 2011 INTRODUCTION: Staff has been reviewing street light standards for residential areas and would update the council. Also staff can review the street lighting system on CR 101 on possible changes for improving the system. BACKGROUND: The city and Shakopee Public Utilities Commission approved a street lighting policy in June of 1998. This policy described the street standards such as spacing and light standards for different districts such as residential or commercial or industrial. One issue staff has seen the last few years is with the fiberglass residential street light poles. These poles have not lasted as long due to weathering of the fiberglass and have had to be replaced prematurely. Staff has research other poles and reviewed these poles with SPU staff to see if a suitable replacement can be found. Staff has done a cost analysis on various poles and based on life cycle costs, an anodized aluminum street pole would be a good substitute. An aluminum pole has a longer life and an anodized pole would need very little maintenance, thus a very effective life cycle cost. Staff would like to discuss the results of our research with council to see if this change would be acceptable. Staff would like to revise the street lighting policy this year and would need to work with SPU staff to accomplish this. Attached is the street lighting policy for council review. Also staff has done more investigation on LED street lighting for CR 101 project working with Ken Tallion of S.E.H., Inc. and would like to update city council on possible changes to make the system more efficient and possibly lower cost. Staff is working on those changes and will update city council at the meeting. 5. ACTION REQUESTED: 1. Provide any direction on the proposed residential street light standard. 2. Provide any direction on the proposed changes to the CR 101 street lighting. nice Lon , .E. Public Works Director H:\ENG\2011 ENGINEERING PROJECTS \2011 COUNCIL \CR 69 WORKSHOP.DOCX WHEREAS, the City Council desires to establish a written policy on street lighting for the City of Shakopee; and WHEREAS, a Street Lighting Policy has been prepared and was reviewed by the City Council at its June 2, 1998 Council meeting. NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF SHAKOPEE, MINNESOTA: City jC1 rk RESOLUTION NO. 4923 A Resolution Adopting A Street Lighting Policy For The City Of Shakopee 1. That the Street Lighting Policy, a copy of which is attached hereto is hereby adopted. 2. This policy shall become effective June 2, 1998. Adopted in ATTEST: session of the City Council of the City of Shakopee, Minnesota, held this )pi a day of ,,�, _, 1998. Mayor of the City of Shakopee L OVERVIEW The City intends that this street lighting policy promote the safe travel of City streets in a manner both fair and affordable to the City and its residents. Street lighting promotes pedestrian and traffic safety and to that extent the City shall approve street lighting where warranted by such concerns. Lighting requests shall come either by recommendation of the City Engineer or by property owners. IL STREET LIGHTING STANDARDS A. GENERAL STANDARDS 1. The developer shall pay the full capital costs of every light to be installed. This includes poles, fixtures, underground wiring, and all appurtenant work. The developer shall pay operation and maintenance for the light system as per City Ordinances and Shakopee Public Utilities Commission's Policy. PLAN APPROVAL - All lighting plans are submitted to the City and SPUC for review with the approval of street lighting plan determined by SPUC's Utility Manager. B. NEW SUBDIVISIONS CITY OF SHAKOPEE STREET LIGHTING POLICY 1. Residential Streets (Average lot size of 2.5 acres or less) Street lights shall be placed at intersections, no more than 300 feet between lights where intersections are more than 450 feet apart, and at the ends of cul -de -sacs where the distance from the end of the cul -de -sac to the street intersection is greater than 250 feet. Developers shaII also install lights to City Standards at the intersections of residential streets with collector streets. The lighting fixture standards shall be as per Shakopee Public Utilities Commission's (SPUC) recommendations and generally as follows: • Local Residential Streets - 24 foot fiberglass poles with 100 watt high pressure sodium (H.P.S.) lamp and light, approximately 19.5 feet above the ground. 1 2. Residential Streets (Average lot size is greater than 2.5 acres) Street lighting standards shall be the same as for residential streets where average lot size is 2.5 acres or less. Street lights shall be placed at intersections, no more than 600 feet between lights where intersections are more than 900 feet apart, and at the ends of cul -de -sacs where the distance from end of cul -de -sac to the street intersection is greater than 500 feet. 3. Arterial and Collector Streets in Residential Areas Street lights shall be placed at intersections and spaced no more than 300 feet between lights -where intersections are more than 450 feet apart, with lights usually alternating from one side to the other depending on the width of the street. The lighting fixture standards shall be per Shakopee Public Utilities Commission's recommendations and generally as follows: • Arterial and Collector Streets (north of Shakopee Bypass) 40 foot wooden poles with 250 H.P.S. lamp in cobra head style luminaries and light is approximately 32 feet above the ground. • Arterial & Collector Streets (south of Shakopee Bypass) 34 foot fiberglass pole with 250 watt H.P.S. lamp with shoebox style luminous and light is approximately 28 feet above the ground. 4. Industrial Areas Street lighting standards shall be the same as Collector Streets (south of Shakopee Bypass). Street lights shall be placed at intersections and spaced no more than 450 feet apart where intersections are more than 675 feet apart. 5. Commercial Areas Street lighting standards shall be the same as Collector Streets. Streets in Commercial District shall have street lights placed at intersections and spaced no more than 300 feet between lights where intersections are more than 450 feet apart, with lights alternating from one side to the other depending on the width of the street. 2 6. Special Lighting Districts Special lighting districts can be established only when approved by the City Council and Utilities Commission (I.E. Downtown Central Business District). C. EXISTING SUBDIVISIONS Where traffic safety clearly warrants, a street light may be placed upon the recommendation of the City Engineer's office. The basis of such warrants shall be a minimum Average Daily Traffic of 2000 vehicles or a layout such that, in the City Engineer's estimation, significant improvement in safety might be obtained by the placement of a street light. Since the benefit of such installations extends to the City as a whole, these will be done at City expense. When propel ty owners request additional lighting for their neighborhoods, they must do so by petition - signed by 60% of the property owners affected by the proposed light. The affected area shall be 150 linear feet on either side of the proposed light, on both sides of the street. The placement of the proposed light shall be specified in the petition. Petitioners shall approach the City, prior to circulating their petition, to obtain direction as to where street lights are warranted for their neighborhoods. Lights shall be approved if they meet the criteria for street lighting standards. If approved, each street light shall be paid for by the affected residents. Payment shall be made prior to the installation of the light and shall include the cost of poles, fixtures, underground wiring and all appurtenant work. The method of payment shall be as directed by the City Finance Department. The City shall assume operation and maintenance costs for a light from the time it is energized by the utility and as per City /SPUC agreements by separate resolutions. In existing developments new lights shall match in style and wattage those already in place. If no lights are currently in place, then 100 or 250 watt high pressure sodium (H.P.S.) lights in cobra -head or traditional style shall be the standard. D. COUNTY HIGHWAYS 1. Street lights shall be placed at intersections when the street light warrants, as established by Scott County Highway Department have been met. If warrants are met, per County policy, the County pays for the installation of the light with the cost of maintenance and operation to be provided as agreed upon in separate resolutions by the City and SPUC. 3 2. Street lights at intersections of City streets to County roads may be installed by the City if traffic and pedestrian safety clearly warrants a light in the estimation of the Public Works Director and as approved by City Council. The basis of such warrants shall be a minimum average daily traffic volume through the intersection of 2,500 vehicles per day or 250 vehicles per non- daylight hour which is defined 6:00 PM to 6:00 AM or if there have been three accidents per year that have occurred during conditions other than daylight or a layout such that in the Public Works Director's estimation, significant improvement in safety might be obtained by the placement of a street light and if the County Road speed limit is posted at 40 m.p.h. or more. 3. Street lights at intersections may be approved by City Council if warrants are not met, per Scott County and the City Engineer; if property owners petition the City and pay for the initial cost. 4. Installation of street lights, along a County road between intersections for traffic and pedestrian safety, will be reviewed on a case by case basis by City Council. III. FUNDING OF COSTS A. INITIAL INSTALLATION OF FIXTURES I. New Subdivisions Residential, commercial and industrial developers will pay for the street lighting system and enter into an agreement with SPUC. 2.. Existing Subdivisions New street lights would be paid for by benefiting properties through upfront payments to the City. The City will reimburse SPUC for installation of street lights. 3. Collector Streets All street lights in developing areas will be paid by the benefitting properties except the City will pay the additional costs, if any, from the required street lighting system for the development. 4. County Roads New street lights not meeting County warrants, but meeting City warrants and if approved by City Council, would be considered a benefit to the 4 Community as a whole and paid by the City from the Capital Improvement fund or other funds as designated by City Council. B. REPLACEMENT OF FIXTURES Z. The replacement of lighting fixtures is a maintenance cost to the City. C. OPERATING COSTS 1. The cost of power for street lighting is provided by SPUC, as part of contributions from SPUC to the City as agreed upon in separate resolutions. D. MAINTENANCE COSTS I. SPUC donates the cost of relamping and routine maintenance services for street lighting as provided by SPUC, as part of contributions from SPUC to the City as agreed upon in separate resolutions. REVISED: 5/28/98 5 Valmont 8' TO 30' ROUND TAPERED STRUCTURES A L U M I N U M CONE TAPERED ALUMINUM SHAFT 6063 —T6 ALLOY Feet and Inches Top Diameter Base Diameter Wall Thickness Shape of Shaft 0708 - 8' 0908 - 10' 1108 - 12' 1308 - 14' 1508 - 16' 1708 - 18' 1908 - 20' 2408 - 25' 2908 - 30' Customer Approval: THICKNESS IN 32ND5 OF AN INCH 4 - 4/32 "or 0.125" Wall 5 - 5/32 "or 0.156" Wall TOP DIAMETER IN INCHES 30 - 3" 40 - 4" 45 - 4-1/2" BASE DIAMETER* 6 - 6/32 "or IN INCHES 0.188" Wall 40 - 4" 50- 5" 60 - 6" 70 - 7" 80 - 8" • For available Bose D'ameter, Wall Thickness and Length Combinations, see Dimensional Load Data Table that follows. T — Tapered Round signature dote EMBEDDED (DIRECT BURIAL) POLES • 8' to 30' mounting heights. • Tenons, brackets, and arms designed for single or multiple luminaire mounting. • Luminaires may be mounted on tenons, brackets or shaft may be drilled to manufacturer's mounting specifications. SPECIFICATIONS All aluminum alloys shall comply with metallurgical and mechanical properties set forth in the Aluminum Association Standards. Shaft: The shaft shall be spun tapered from all new seamless 6063 alloy aluminum tubing and shall be heat treated to produce a T6 temper. Each shaft shall have a minimum of 6" straight length at the top. Top straight section serves as a slipfitter for a luminaire or For the hub of the appropriate Valmont bracket or tapered arm. Alternatively, the straight section may be drilled for mounting luminaires. The shaft shall be cone tapered to the base diameter. All Valmont shafts shall be polished with fine grain aluminum oxide cloths, resulting in a high quality circumferential satin brushed finish. After finishing, each pole shall be wrapped for protection in shipment. Direct Embedment: Unless otherwise specified, the length of the embedded section of a 4" diameter shaft shall be 3', 5" and 6" shall be 4', 7" and 8" shall be 5'. A 1 - /2" diameter grommetted wire inlet hole located 1' 6" below grade shall be included. The embedded section of the pole shall be coated inside and outside with zinc rich paint. Special Finishes: Natural anodize, duranodic, or painted finishes may be specified as an addition to the satin brushed finish, if required. All aluminum parts and accessories shall receive a finish similar to that specified. Ground Lug: Each pole shall include a 5/1 " - 18 tapped provision for ground connector. Handhole: Available as an option. Anti - Rotation Device: Available as an option. T E - Embedded Base or Mounting E Dl - 1@90 D2 - 2 @180 03 - 3 @120 D4 - 4@90' D5 - 2 @90 D6 - 3 @90 P2 - 2 -3/8 "x 4 Tenon P9 - Other Tenon (Please Specify) Fixture Mounting CATALOG LOGIC Finishes Options Feet & Inches* Diameter' Wall Thickness` Shape of Shaft Base or Mounting Fixture Mounting Finishes Options POLYESTER POWDER DBL - Black DBR - Bright Red DCG - Charcoal Gray DDB - Dark Bronze DMB - Med Bronze DNA - Natural Alum DSB - Steel Blue DSS - Sandstone DTG - Dark Green DWH- White SC — Special Color Please Specify) ANODIZED 204 - Clear Natural 311 - Light Bronze* 312 - Med Bronze* 313 - Dark Bronze* 335 - Black* * Duranodic Anodize BRUSHED SBF - Satin Brushed Finish See Accessory Section (Please Specify with Code t!) Job Name: Quote: Client Name. Created By: Date. Valmont Industries, Inc... 20$115.Eaton Avenue • Farmington, Minnesota 55024 -7932 (800)899-7577 • valmontstructures.com A2 -11 TYPICAL WEIGHT AND ALLOWABLE SIZE OF LUMINAIRES* DIMENSIONS OF POLES NOMINAL MOUNTING HEIGHT TYPICAL LUMINAIRE WEIGHT (LBS.) EFFECTIVE PROJECTED AREA IN SQUARE FEET AT: EXPOSED HEIGHT OVERALL SHAFT TOP BASE LENGTH WALL MODEL NUMBER ** 70 80 MPH MPH 90 MPH 100 110 MPH MPH 8' 75 19.1 14.4 11.1 8.8 7.1 7'8" 10'8" 3" 4" .125" 0708- 30404TE 10' 75 14.3 10.6 8.1 6.3 5.0 9'8" 12'8" 3" 4" .125" 0908- 30404TE 12' 75 11.0 8.0 6.0 4.5 3.5 11'8" 14'8" 3" 4" .125" 1108- 30404TE 12' 75 18.5 13.8 10.5 8.3 6.6 11'8" 15'8" 3" 5" .125" 1108- 30504TE 14' 75 8.5 6.0 4.4 3.2 2.4 13'8" 16'8" 3" 4" .125" 1308- 30404TE 14' 75 14.8 10.8 8.2 6.3 5.0 13'8" 17'8" 3" 5" .125" 1308- 30504TE 16' 75 7.1 5.0 3.5 2.4 1.7 15'8" 18'8" 3" 4" .125" 1508- 30404TE 16' 75 12.0 8.6 6.4 4.8 3.8 15'8" 19'8" 3" 5" .125" 1508- 30504TE 16' 75 15.3 11.1 8.4 6.5 5.1 15'8" 19'8" 3" 5" .156" 1508- 30505TE 18' 75 9.7 6.7 4.9 3.6 2.7 17'8" 21'8" 3" 5" .125" 1708- 30504TE 18' 150 12.2 8.7 6.4 4.9 3.8 17'8" 21'8" 3" 5" .156" 1708- 30505TE 18' 150 19.1 14.1 10.8 8.5 6.9 17'8" 21'8" 4" 6" .156" 1708- 40605TE 20' 75 8.2 5.5 3.8 2.6 1.9 19'8" 23'8" 3" 5" .125" 1908- 30504TE 20' 75 10.4 7.2 5.1 3.7 2.8 19'8" 23'8" 3" 5" .156" 1908- 30505TE 25' 150 10.5 7.1 5.1 3.8 2.9 24'8" 28'8" 4" 6" .156" 2408- 40605TE 25' 150 13.5 9.4 6.9 5.3 4.2 24'8" 28'8" 4" 6" .188" 2408- 40606TE 30' 150 11.1 7.5 5.3 4.0 3.0 29'8" 34'8" 4" 7" .156" 2908- 40705TE 30' 150 16.7 12.0 9.1 7.0 5.5 29'8" 34'8" 4.5" 8" .156" 2908- 45805TE 8' TO 30' ROUND TAPERED EMBEDDED (DIRECT BURIAL) POLES ANCHOR BASE AND BOLT DETAIL "A" BOTTOM DIAMETER 1 -1/2" DIA. GROMMETTED WIRE INLET HOLE ROUND EMBEDDED (DIRECT BURIAL) STANDARD WIRE INLET HOLE 1' 6" FROM GRADE " EMBEDDED LENGTH DIMENSIONAL AND LOAD DATA A BOTTOM DIAMETER 4" 5" 6" 7 " 8 " valmont STRUCTURES A L U M I N U M B" EMBEDDED LENGTH 3' 4' 4' 5' 5' • 5' minimum embedded length for Canadian market. • EPA calculations are based on a 1.3 Gust Factor. Variations from sizes listed above, available upon inquiry at the factory. Satisfactory performance o lighting poles is dependent upon the pole being properly attached to a supporting foundation of adequate design. Valmont does not design or offer recommendations for foundations. •• Model number does not include mounting options or finish designation. A2-12, Valmont Industries, Inc... 20805 Eaton Avenue » Farmington, Minnesota 55024-7932 (800)899 -7577 - valmontstructures.com