EGBA - IFB 2019-0011 - Missionary Tower Replacement (3 of 4).pdf
PDF 965 KB Posted
- Attached to
- EGBA-FY19-RFP for the Missionary Tower FR#64233
- Solicitation number
- IFB1 EGBA 2019000011 2
- Issued by
- Ouray County, Denver City, Colorado
About this file
This is a design and technical specification document for the Missionary Ridge Tower Replacement project, a communication tower infrastructure initiative in La Plata County, Colorado. The project requires the Design/Build Entity to design, supply, and erect a 160-foot self-supporting communication tower compliant with all applicable laws, codes, and standards. The tower site is located approximately 10 miles northeast of Durango at coordinates 37°21'47.53"N, 107°46'59.19"W at an elevation of 9,851 feet. The design must accommodate multiple existing and future antennas and transmission lines, including various microwave dishes, Yagi antennas, and omni-directional antennas mounted at different elevations ranging from 20 feet to 160 feet, with the tower operating at no more than 80 percent of its full capacity.
The tower design must meet specific environmental and structural criteria including a basic wind speed of 110 miles per hour per ASCE 7-16 standards, a service wind speed of 60 miles per hour, ice thickness design of 0.25 inches, and Exposure Category C classification. The document includes comprehensive engineering drawings and specifications (sheets G-01 through AA-01) dated January 4, 2018, with design approvals by JRD and prepared by CAM. The technical specifications detail 26 separate antenna and transmission line components, with specific notations for items to be deleted or installed as "Design/Build Entities" (D/B E). The design accommodates multiple communication systems including microwave dishes ranging from 3 feet to 8 feet, fourbay antennas at various heights, and specialty antennas such as those for coal bank and oak brush hill communications with specified vertical polarization requirements.
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Text version
JRD
CAM
03 JAN 2018
001.014
001.014
JRD
G-01
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
M
ISSIO
NARY RIDGE TO
W
ER REPLACEM
ENT
LA PLATA CO
UNTY, CO
LO
RADO
37°21'47.53"N, 107°46'59.19"W
01/04/2018
03 JAN 2018
001.014
001.014
JRD
G-02
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
001.014
JRD
G-03
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
01/04/2018
ID
Condition Type
M ount
Elev.
Approx.
Azim uth W aveguide /Coax
D/B E
20’ Fourbay 87’
½
D/B E
20’ Fourbay 83’
7/8”
Delete
8’ M icrow ave Dish 80’
210⁰ 2 ¼”
Delete
8’ M icrow ave Dish
Sm elter Reflector
79’ 99⁰
1 7/8”
D/B E
5’ Yagi 70’
½
D/B E
6’ Yagi 60’
½
D/B E
6’ Yagi 60’
½
D/B E
4’ Yagi 54’
½
Delete
4’ M icrow ave Dish
SS to Dispatch 52’
200⁰ ¾
D/B E
20’ Fourbay 47’
½
Delete
6’ M icrow ave Dish 41’
351⁰ 1 7/8”
Delete
3’ M icrow ave Dish 38’
80⁰ 1 ¼”
Delete
8’ M icrow ave Dish 35’
326⁰ 2 ¼”
D/B E
20’ Fourbay 22’
½
Delete
3’ M icrow ave Dish 20’
210⁰ 1 ¼”
Aviat
6’ M icrow ave Dish
PAD6-65B
Grassy
Vertical Polarization
38’ 91.54⁰
E65
Aviat
6’ M icrow ave Dish
PAD6-65A
Coal Bank
Vertical Polarization
39’ 0.63⁰
E65
Aviat
6’ M icrow ave Dish
PAD6-59B
O ak Brush Hill M ain
Vertical Polarization
136’ 107.31⁰
E65
Aviat
6’ M icrow ave Dish
PAD6-59B
O ak Brush Hill Diversity
Vertical Polarization
78’ 107.31⁰
E65
3.0.
CO
M M
UN
ICATIO
N
TO
W
ER STRUCTURE:
3.1.
Site Location:
Table 1 – Site Location
Com m unication Site Coordinates
Location
M issionary Ridge
37°21'47.53"N 107°46'59.19"W
The site is located in La Plata County, Colorado approxim ately 10 m iles northeast of Durango.
3.2.
The Design/Build Entity shall design, supply and erect all necessary equipm ent for a fully functional one-hundred sixty (160) foot self-support com m unication tow er com pliant w ith all applicable law s, codes, standards, and the follow ing environm ental conditions:
Table 2 - Environm ental Criteria
Design Constraint Criteria
Basic W ind Speed (3 second gust: ASCE7-16)
110 M
PH
Service W ind Speed (3 second gust)
60 M
PH
Topo Category (M ethod 1)
Crest Height 3300 ft
Exposure Category C
Structure Class
III
Design Ice Thickness 0.25”
Ground Elevation Factor (K e ) – Elev: 9851’
0.700
3.3.
The tow er design shall support the follow ing existing and future antennae and associated transm ission lines and not be loaded in excess of 80% of its full capacity:
Table 3 – Tow er Equipm ent Table
ID
Condition Type
M ount
Elev.
Approx.
Azim uth W aveguide /Coax
D/B E
10’ Low Band
160’
½
D/B E
10’ O m ni
DTR Tow er top am p
160’
160’
7/8”
½ ”(Test Port)
D/B E
20’ Fourbay 160’
½
Delete
8’ M icrow ave Dish 132’
235⁰ 2 ¼”
D/B E
12’ O m ni 115’
7/8”
D/B E
20’ Fourbay 112’
½
7/8”
D/B E
4’ O m ni 93’
½
03 JAN 2018
001.014
001.014
JRD
G-04
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
001.014
JRD
G-05
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
001.014
JRD
G-06
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
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JRD
G-07
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
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JRD
G-08
DESIGN BY:
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N BY:
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VED BY:
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JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
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JRD
G-09
DESIGN BY:
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N BY:
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VED BY:
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JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
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JRD
C-01
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
001.014
JRD
C-02
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
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JRD
C-03
DESIGN BY:
DRAW
N BY:
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VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
01/11/2018
03 JAN 2018
001.014
001.014
JRD
E-01
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
03 JAN 2018
001.014
001.014
JRD
AA-01
DESIGN BY:
DRAW
N BY:
APPRO
VED BY:
ISSUE DATE:
JO
B NUM
BER:
DW
G FILE NO
REVISION
DATE
REVISION BY
DW
G NO
SHEET NO
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