Sligo Baptist Church - Tower Committee Recommendation 2/7/2014

8/11/2019 Sligo Baptist Church - Tower Committee Recommendation 2/7/2014

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MONTGOMERY COUNTY, MARYLAND

TOWER COORDINATOR

RECOMMENDATION

APPLICATION NUMBER: 201403-15 DATE: 7 February 2014

Application Information:

Applicant: AT&T

Description: Construct a 101-high monopole and attach twelve panel antennas, three 72

high and nine 92high, at the 97level.Site Location: Sligo Baptist Church

1610 Dennis Avenue, Silver Spring

Property Owner: Sligo Baptist Church, Inc.

Classification in accordance with Zoning Ordinance: R-60Private Property:

Public Property:

By right:

Mandatory Referral:

Minor Modification

Special Exception:

Special Exception

Modification:Impact on land-owning agency: N/A

Existing or future public safety telecommunications facilities and plans: N/A

Co-location options: Based on our review of the TFCG database and our site visit, we do not

find that there are any existing structures to which AT&T could attach their antennas in the


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The panorama photo below shows a view of the homes directly across Dennis Avenue from

the church and their view of the monopole (indicated by the arrow to the right in the photo).

The photo below on the left shows the townhomes across the stormwater retention pond fromthe church. The photo on the right shows a view of the monopole (approximate height and

location indicated by the arrow) from the townhomes. The tall trees will likely screen themonopole from view for some residents to the east and south of the site. Other views may be

diminished by the distance of the homes from the monopole.


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coverage area at the target signal levels becomes very small around the church property. The

trees, especially when in full foliage, will also likely diminish propagation of the signalsacross the vicinity. Consequently, antennas at the lower elevation will not provide reliable

service between the adjacent AT&T sites. We agree that antennas at least at the 97 height

above ground are required to meet the coverage objective. Antennas below that level may notprovide the intended signal levels to neighborhoods east of Sligo Creek and west of Georgia

Avenue to permit reliable service connections and links with the adjacent AT&T antenna

sites.

AT&Ts equipment will be placed in a 12 x 12 shelter along with an emergency power

generator on a concrete pad to be constructed in a 25x 30area enclosed within a chain link

fence at the base of the monopole. The plans show that neither the monopole nor the ground

space around the base of the monopole is designed to accommodate antennas and equipmentfrom two additional carriers as required by the County Zoning Ordinance, Section 59-G-2.58

(5)(B) states that The Board may approve a support structure holding less than 3telecommunications carriers if: the Board decides that construction of a lower support

structure with fewer telecommunications carriers will promote community compatibility. A

shorter monopole will minimize the impact of the facility in the community. Because the

equipment area is amid a wooded area, the equipment area will be screened from view.

Tower Coordinator Recommendation: Recommended:Recommended with Conditions:Not Recommended:

Conditions: On approval by the Board of Appeals for a special exception to permit the

monopole in a residential zone, and on a design that does not meet the requirements toprovide for co-location of at least two additional carriers facilities at the site. Additionally,


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Applicant Name:AT&T Mobility

DBA:

Address:10015 Old Columbia Rd, Suite F-100, Columbia, MD 21046

Contact Personand Phone No.:Phil Stetler, 443-977-7561

Provide a description of the proposed installation, including the type and height of the structure (i.e. monopole, rooftop, water tank, guyed tower, self-support tower, etc.) and whether it is existing, modified, or new. Describe anymodifications that will be made to existing structure.AT&T proposes to install a new 101 monopole with 11-5x 12-0 shelter and generator within a 25x30 fenced

compound at the tower base. AT&T will also install twelve (12) panel antennas at the 97 RAD center on the monopole.

Address/City: 1610 Dennis Avenue, Silver Spring, MD 20902

Site Name: Dennis Ave Zoning: R-60

Site Owner/Landlord: Sligo Baptist Church Inc

MONTGOMERY COUNTY, MARYLAND

APPLICATION FOR WIRELESS COMMUNICATIONS

SITE COORDINATION

DATE: _______________ NUMBER: ____________________

(To be filled in by County)

-Rev se - -

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If not, describe results of investigation about possible co-location. Include a listing of alternative sites considered andan explanation as to why each possible alternative was not selected. If a site was ruled out because of radio frequency(RF) issues, provide RF propagation maps documenting inadequate coverage: The provided RF propagation mapsdisplay the inadequate coverage for the subject site area and justify the need for the new site.

Justification of why this site was selected:please see attached RF justification.

Will site be used to support government telecommunications facilities or other equipment for government use?no

If yes, describe:

Attach a site plan of the proposed facility showing location of monopole, tower, or structure on the property, locationof existing and proposed equipment buildings or cabinets, and distance of any new structures or buildings fromproperty lines and other buildings or residences within 300 feet. Clearly identify existing versus proposed facilitiesby carrier. Also provide an elevation sketch of the structure showing major dimensions, existing attachments, andmounting height of proposed antennas. If a balloon test has been performed, please provide copies of the photographs.

Will the antenna installation be in compliance with the maximum permissible RF exposure limits set forth in1.1310 of the FCC Rules and Regulations? Yes NoIf the answer is no, please attach an explanation.

Type of compliance study required under 1.1307 of the FCC Rules and Regulations:Categorically ExcludedRoutine Environmental EvaluationEnvironmental Assessment

If antennas will be located on a rooftop, please attach a description of any steps that have been or will be taken toprevent the aggregate RF from exceeding exposure limits. N/A


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The CCI Hexport Multi-Band Antenna Array is an industry first 6-port antenna

with full WCS Band Coverage. With four high band ports and two low band

ports, our hexport antenna is ready for 4X4 high band MIMO.

Modern networks demand high performance, consequently CCI has incorpo-

rated several new and innovative design techniques to provide an antenna

with excellent side-lobe performance, sharp elevation beams, and high front

to back ratio.

Multiple networks can now be connected to a single antenna, reducing tower

loading and leasing expense, while decreasing deployment time and installa-

tion cost.

Full band capability for 700 MHz , Cellular 850 MHz, PCS 1900 MHz, AWS

1 10/21 0 MH d WCS 2300 MH i i l l

HEXPORTMulti-Band ANTENN

HPA Antenna Series

Model HPA-65R-BUU-H8


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HPA-65R Multi-Band Antenna

Electrical Specifications

HPA Antenna Series


Frequency Range

2 X Low Band Ports which coverthe full range from 698-894 MHz

4 X High Band Ports which cover the full range from 1710-2360 MHz

698-806 MHz 824-894 MHz 1850-1990 MHz1710-1755/2110-2170

MHz2305-2360 MH

Gain 15.3 dBi 16.2 dBi 17.1 dBi 16.3 dBi 17.4 dBi 17.7 dBi

Azimuth Beamwidth (-3dB) 65 61 62 68 64 60

Elevation Beamwidth (-3dB) 10.1 8.4 5.6 6.2 5.0 4.5

Electrical Downtilt 2 to 10 2 to 10 0 to 8 0 to 8 0 to 8 0 to 8

Elevation Sidelobes (1st Upper) < -17 dB < -17 dB < -19 dB < -18 dB < -18 dB < -17 dB

Front-to-Back Ratio @180 > 29 dB > 28 dB > 35 dB > 35 dB > 35 dB > 35 dBFront-to-Back Ratio over 20 > 28 dB > 27 dB > 28 dB > 27 dB > 28 dB > 28 dB

Cross-Polar Discrimination (at Peak) > 24 dB > 20 dB > 25 dB > 25 dB > 25 dB > 25 dB

Cross-Polar Discrimination (at 60) > 16 dB > 14 dB > 18 dB > 18 dB > 18 dB > 18 dB

Cross-Polar Port-to-Port Isolation > 25 dB > 25 dB > 25 dB > 25 dB > 25 dB > 25 dB

VSWR < 1.5:1 < 1.5:1 < 1.5:1 < 1.5:1 < 1.5:1 < 1.5:1

Passive Intermodulation (2x20W) -150dBc -150dBc -150dBc -150dBc -150dBc -150dBc


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RET [Remote Electrical Tilt] System

General Specification

Part Number BSA-RET200

Protocols AISG 2.0

Adjustment Cycles >10,000 cycles

Tilt Accuracy 0.1

HPA Antenna Series


Electrical Specification

Interface Signal Data | dc

Input Voltage Range 10-30 Vdc, Specifications at +24 VDC

Current consumption during tilting 120mA at Vin = 24V

Current consumption idle 55mA at Vin=24V

Ordering Information:

HPA-65R-BUU-H8 8 Foot Hexport Antenna with 65 Azimuth Beamwidth with FactoryInstalled RET Actuators (3)

HPA-65R-BUU-H8-K Complete Kit with Antenna, Factory Installed Actuators (3) and M03Mounting Bracket

BSA-RET200 RET Actuator

BSA-M03 Mounting Bracket (Top & Bottom) with 0 through 10 Mechanical tiltAdjustment

M03 TopMounting Bracket

M03 BottomMounting Bracket


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Sligo Baptist Church - Tower Committee Recommendation 2/7/2014

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