Item 6B13 SOUTHLAI<,,E
CITY OF
Department of Planning & Development Services
'�a drill 0 =:7No 1•] :aI
June 1, 2011
PROJECT: Variance to Lighting Ordinance for Carroll Independent School District
EXECUTIVE
SUMMARY: Hart, Gaugler & Associates, Inc., on behalf of Carroll Independent School District, is
requesting approval of a variance to the Lighting Ord. No. 693 -B, to permit the use
of light- emitting diode (L.E.D.) type lighting in place of high pressure sodium lights
at all Carroll Independent School District (CISD) campuses and facility locations
within the City of Southlake.
REQUEST
DETAILS: Hart, Gaugler & Associates, Inc., on behalf of Carroll Independent School District
(CISD), is requesting a variance to the Lighting Ordinance No. 693 -B for all CISD
campuses and facilities to use L.E.D. lighting and has provided a letter under
Attachment `C' of this staff report to support this request. The Lighting Ordinance
requires that all light sources on poles over 42- inches in height and exterior wall
mounted light fixtures shall be high pressured sodium lights or other lights that give
a similar soft lighting effect. Six photometric studies are attached for the new
schools and expansions that are currently underway and for Dragon stadium. The
applicant is requesting a variance for all the CISD campuses and facilities to allow
the use of L.E.D. lighting at the remaining campuses in the future. The applicant
has also indicated all other requirements of the Lighting Ordinance shall be met.
ACTION NEEDED: 1) Consider Variance Request to Lighting Ordinance
ATTACHMENTS: (A) Background Information
(B) Vicinity Map
(C) Variance Request Letter & Plan Exhibits
STAFF CONTACT: Dennis Killough (817) 748 -8072
Richard Schell (817) 748 -8602
BACKGROUND INFORMATION
OWNER/APPLICANT: Carroll Independent School District
PROPERTY SITUATION: 500 S. Kimball Ave.
LAND USE CATEGORY: Public /Semi - Public, Mixed Use, Medium Density Residential, Low Density
Residential, Office Commercial & 100 -Year Flood Plain
CURRENT ZONING: Multiple Zoning Districts
PLANNING & ZONING
COMMISSION ACTION: March 24, 2011; Approved (7 -0) as presented in the staff report dated
March 18, 2011.
CITY COUNCIL ACTION: April 5, 2011; Approved (6 -0) a motion to table the item to the April 19, 2011
meeting.
April 19, 2011; Approved on consent (7 -0) to table the item to the May 3,
2011 meeting.
May 3, 2011; Approved on consent (7 -0) to table the item to the June 7,
2011 meeting.
STAFF COMMENTS: The applicant has indicated that all other requirements of the Lighting
Ordinance No. 693 -B shall be met.
Attachment B
Page 1
Vicinity . •
Carroll Independent School District
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Attachment B
Page 1
A Hart, Gaugler & Associates, Inc.
Civil & Structural Engineering
O O
March 7, 2011
Mr. Dennis Killough
City of Southlake
Department of Planning
1400 Main Street, Suite 310
Southlake, TX 76092
Re: Carroll Independent School District
Lighting Narrative
Dear Dennis:
Lighting Ordinance No. 693 -B provides for luminaries on poles over 42 inches in height to be
high pressured sodium lights or other lights giving a similar soft lighting effect. The ordinance
was adopted in 1999 when high pressured sodium lights were considered state of the art and an
energy efficient lighting option. One of the purposes of the ordinance is stated in Section 1.
Purpose, paragraph (e) "promote efficient design and operation with regard to energy
conservation'.
We are requesting approval to use an LED light source in lieu of the high pressured sodium
mandated in the lighting ordinance on all CISD properties. Other aspects of the lighting
ordinance will be followed. The main advantages of the LED light source are:
• Energy efficiency — A more even illumination pattern can be achieved across an area with
much less wattage and lumens of light because each individual LED is aimed at a different
angle to hit a different spot. Lumens per watt is meaningless when comparing LED to
HID (high pressure sodium or metal halide) because of this. In turn, the LED may utilize
as much as 75% less wattage than the HID to accomplish the same lighting layout.
• Long Life — Maintenance costs are significantly reduced with the 50,000 to 100,000 hour
life of the LED. The LED continues to illuminate beyond this time frame, just at a light
level under 70% or so of the initial level.
• Glare and Light Trespass Control — Problems with glare and light trespass are reduced
because of the lower wattages/lumens. These lights will not exceed any of the maximum
on -site or off -site illumination regulations of the ordinance.
• Silent Operation — No buzzing or humming like the ballasted HID.
• Durability — No worries with lamp breakage due to vibration or vandalism.
• Smaller fixture size — Smaller, thinner fixtures are more aesthetic and less susceptible to
wind.
Photometric information is provided for the following properties:
1. Johnson Elementary School Addition
2. Carroll Elementary School Addition
3. New Elementary School #5
4. New Middle School
5. CISD Senior High School Addition
6. Dragon Stadium Addition
12801 N. Central Expressway • Suite 1400 • Dallas, TX 75243 • Voice 972- 239 -5111 • Fax 972 - 239 -5055
Attachment C
Page 1
HGA Hart, Gaugler & Associates, Inc.
Civil & Structural Engineering
A O
Please feel free to contact us with any questions you may have as you review this request.
Sincerely,
Hart, Gaugler & Associates, Inc.
John D. Blacker, P.E.
Principal
RVM7t2W(ACiviASUbmittebLM11 -03.M formalsubi iltab2011.0307_M- fighting NARRATIVE- SOUTHIAU. final.doc
12801 N. Central Expressway • Suite 1400 • Dallas, TX 75243 • Voice 972- 239 -5111 • Fax 972- 239 -5055
Attachment C
Page 2
CARROLL ELEMENTARY SCHOOL
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DRAGON STADIUM
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Attachment C
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JOHNSON ELEMENTARY SCHOOL
Attachment C
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NEW CARROLL ELEMENTARY SCHOOL
Attachment C
Page 6
NEW CARROLL MIDDLE SCHOOL
Attachment
Page
CARROLL SENIOR HIGH SCHOOL
Attachment C
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