Attachment 2- Drawings PSN 16677450 (1).pdf
PDF 356 KB Posted
- Attached to
- Replace Medium Voltage Cutoff Switches at US Coast Guard Air Station Cape Cod Buzzards Bay, Massachusetts
- Solicitation number
- 70Z0G126BCCODCH01
About this file
These are engineering drawings for a U.S. Coast Guard construction project at Base Cape Cod in Buzzards Bay, Massachusetts (Project 16677450: Replace Medium Voltage Transformer Cutoff Switches - Elect Dist System [All]). The drawings are prepared by the Civil Engineering Unit Providence and include vicinity maps, location maps, site plans, and detailed technical specifications.
The project involves replacing existing medium voltage cutoff switches within the electrical distribution system serving multiple buildings at the base. Key work includes installing two new 15kV SF6 gas switches: a 5-position switch (86936) and a 4-position switch (86937), along with associated concrete pads, conduit systems, and grounding infrastructure. The project specifications detail concrete pad construction (24 inches minimum depth with compacted 2-inch stone base and 6x6 welded wire fabric), conduit routing (4-inch schedule 80 RGS with threaded ground bushings), grounding requirements (1/0 bare copper ground wire installed 12 inches below grade with 3/4-inch x 10-foot ground rods), and safety features including yellow-painted steel pipe posts. The one-line diagrams show connections to existing transformers (500kVA, 300kVA, and 112.5kVA units) and load break elbow terminations. Additional work includes providing 15kV cables, load break elbows, caps, and bollard installations at specified locations throughout the base electrical distribution network.
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Text version
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MICHAEL P. CAROSOTTO, PE
MICHAEL P. CAROSOTTO, PE
DAVID DILL, PE
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BRANCH CHIEF
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VICINITY MAP
SCALE: NTS
LOCATION MAP
SCALE: NTS
DRAWING INDEX
SHEET ID SHEET # SHEET TITLE
G-001 01 COVER SHEET
E-101 02 SITE PLAN
E-401 03 ENLARGED SITE PLANS
E-501 04 DETAILS
E-601 05 ONE LINE DIAGRAM
BASE CAPE COD - HQ & AIRFIELD
BUZZARDS BAY, MASSACHUSETTS
16677450 REPLACE MEDIUM VOLTAGE
TRANSFORMER CUTOFF SWITCHES
ELECT DIST SYSTEM (ALL)
U.S. COAST GUARD
CIVIL ENGINEERING
CEU PROVIDENCE
EXCEL
LE
N C E I N
E N G I N E E R I N G
U . S . C O A S T G U
A R
D
CIVIL
ENGINEERING UNIT
PROVIDENCE
o
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BAY
U.S.C.G.
BASE
CAPE CODSHELTON
ROAD
CONNERYAVE.
AIR FORCE
OTIS
BASE
o6
COD
CAPE
CAPE COD CANAL
SAGAMORE
6o
BUZZARDS BAY
FALMOUTH
WOODS HOLE
o195
WAREHAM
495o o
BOURNE
PLYMOUTH
WELLFLEET
EASTHAM
ORLEANS
HARWICH
NANTUCKET SOUND
BARNSTABLE
MASHPEE
6o
HYANNIS
YARMOUTH
CAPE COD BAY
USCG BASE
CAPE COD
SANDWICH
DENNIS
BREWSTER
o
CHATHAM
PROVINCETOWN o
TRURO
KWH/D
SYMBOLS
SHEET WHERE SECTION IS SHOWN
R
1/C
Y
SECTION NUMBER
LEGEND
KILOWATT HOUR DEMAND METER
SWITCH
POWER POLE
PROTECTIVE CAP
AIR BREAK SWITCH
CURRENT TRANSFORMER
FENCE
INCHES
LIGHTNING ARRESTER W/GROUND
LOAD BREAK ELBOW WITH INSERT
GROUND ROD
INTERNAL FUSE
SPLICE OR JUNCTION
LOAD BREAK SWITCH
TRANSFORMER
FUSED OIL CUTOUT SWITCH
SINGLE CONDUCTOR
WYE
FEET
NUMBER
E-501
D3
ABBREVIATIONS
BLDG BUILDING
E.M.H. ELECTRICAL MANHOLE
H.H. HANDHOLE
N.T.S. NOT TO SCALE
E
T
ELECTRICAL
TELECOM
TRANSFORMERT
E ELECTRICAL MANHOLE
E ELECTRICAL HANDHOLE
D3 E-501
SHEET WHERE DETAIL IS SHOWN
DETAIL NUMBER
T TELECOM MANHOLE
UTILITY POLE
BLDG.
BLDG.
3173BLDG.
3162BLDG.
BLDG.
BLDG.
BLDG.
COMM
COMM
COMM
COMM
E E
E
E E
E
E E
E E
E
E
ECOMM
E
E.M.H.#2
E.M.H. 3
E.M.H. 4
E.M.H. 6
E.M.H. 7
E.M.H. 9
E.M.H. 8
H.H. 1
PARKING LOT
E.M.H. 10
E.M.H. 5
STAIR WAY
"D"
E E
FENCE
TO E.M.H. 11
30'-0"
C2 E-401
C7 E-401
BLDG.
PROVIDE 15KV SWITCH
(SEE C7/E-401)
PROVIDE 15KV SWITCH
(SEE C2/E-401)
HANGAR
HANGAR
BURGE BLVD.
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ELECT DIST
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US COAST GUARD
CIVIL ENGINEERING
NORTH
PLAN
TR
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N C1 SITE PLAN
SCALE: 1' = 80'
ALL WORK SHALL BE PERFORMED IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE LATEST EDITION OF NFPA 70, NATIONAL ELECTRICAL CODE (NEC) AND NATIONAL ELECTRICAL SAFETY CODE (ANSI C2). AND IN ACCORDANCE WITH ALL STATE AND FEDERAL CODES, DESIGN STANDARDS AND
BEST PRACTICES.
ALL RGS CONDUITS SHALL BE SOLIDY GROUNDED BY THE CONTRACTOR WITH THE USE OF GROUND
BUSHINGS AND 1/0 AWG BARE CU. WIRE.
THE CONTRACTOR SHALL MAKE ALL TERMINATIONS TO THE EQUIPMENT INDICATED IN ORDER TO
OBTAIN A FULLY OPERATIONAL SYSTEM.
ALL ELECTRICAL EQUIPMENT SHALL BE INSTALLED AND SUPPORTED PER THE MANUFACTURER'S
INSTRUCTIONS.
ALL MATERIAL AND EQUIPMENT PROVIDED BY THE CONTRACTOR SHALL BE NEW.
THE CONTRACTOR SHALL BE RESPONSIBLE FOR DAMAGE TO ANY EXISTING UTILITIES OR
EQUIPMENT CAUSED BY HIS WORK. REPAIRS OR REPLACEMENT SHALL BE AT THE DIRECTION OF
THE GOVENRMENT AT NO COST TO THE GOVERNMENT.
ALL EXPOSED AND DISTURBED SOIL SURFACES SHALL BE RESTORED TO ORIGINAL CONDITION BY
THE CONTRACTOR (SEE SPECIFICATIONS).
THE CONTRACTOR SHALL GIVE FOURTEEN DAYS WRITTEN NOTICE OF ANY OPERATIONS OR
CONNECTIONS WHICH MAY CAUSE INTERRUPTION OF THE FACILITIES, AND SHALL MUTUALLY
AGREE WITH THE ENGINEERING OFFICER AS TO THE TIME AND DURATION SUCH INTERRUPTIONS
MAY BE PERFORMED WITH THE LEAST DISRUPTION TO FACILITY OPERATIONS.
THE CONTRACTOR SHALL GIVE FOURTEEN DAYS WRITTEN NOTICE OF ANY OPERATIONS OR
CONNECTIONS WHICH MAY CAUSE SITE POWER INTERRUPTIONS OF THE FACILITIES. CONTRACTOR
SHALL COORDINATE OUTAGE REQUESTS AND SCHEDULING OF CUTOVER WORK WITH THE
ENGINEERING OFFICER AND CONTRACTING OFFICER. OUTAGES SHALL BE LIMITED TO 4 HOURS.
POWER OUTAGES SHALL BE LIMITED TO A MAXIMUM (4) HOURS PER 24 HOUR PERIOD. IF MORE TIME IS NEEDED, CONTRACTOR SHALL PROVIDE TEMPORARY POWER FOR ALL FACILITIES LISTED DURING
SITE POWER INTERRUPTIONS. EQUIPMENT SHALL BE INSTALLED AND OPERATING BEFORE THE
PERIOD OF POWER INTERRUPTION BEGINS. TEMPORARY POWER SHALL BE RATED AT 100% OF THE
LOAD BEING SERVED. THE CONTRACTOR SHALL ENSURE CONNECTIONS ARE SECURED AND
SAFEGUARDED FOR THE SAFETY OF UNAUTHORIZED PERSONNEL. THE CONTRACTOR SHALL
PROVIDE A DETAILED PLAN TO THE COAST GUARD THAT INCLUDES THE TEMPORARY GENERATOR
SIZE, EXPECTED FUEL CONSUMPTION, EXPECTED FUEL CAPACITY, LOAD CALCULATIONS, AND AN
AFTER HOURS SERVICE REPRESENTATIVE FOR EMERGENCY MAINTENANCE OF GENERATOR IN
CASE OF UNEXPECTED FAILURE. THIS SERVICE REPRESENTATIVE SHALL RESPOND TO PHONE CALL
WITHIN ONE HOUR AND SHALL BE ON SITE WITHIN 3 HOURS OF EMERGENCY CALL.
UPON COMPLETION OF EACH WORK DAY, THE CONTRACTOR SHALL ENSURE THERE ARE NO
EXPOSED LIVE PARTS AND SECURE THE ENTIRE CONSTRUCTION AREA VIA A LOCKED, 6' HIGH CHAIN
LINK FENCE, WITH WARNING SIGNS, FOR THE SAFETY OF UNAUTHORIZED PERSONNEL.
CONTRACTOR SHALL EXTEND ALL EXISTING 5KV CABLES AS NECESSARY FOR THE INSTALLATION OF
NEW 5KV DISTRIBUTION SWITCHES.
ALL LOAD BREAK ELBOWS SHALL BE GROUNDED UTILIZING TAPE SHIELD ADAPTER KITS.
NOTES:
80' 160'0
X
X
E E
E E
E E
E E
E E
E E
E E
E
E E
GRASS AREA
GRASS AREA
BI
T.
C
ON
CR
ET
E
RO
AD
W
AY
H.H. 1
TO E.M.H. 1
E
EXISTING TO REMAIN PROVIDE 15KV CONDUCTORS
EXIST. RISER POLE AND
AIR INTERRUPTER SWITCH
(NORMALLY OPEN) - USAF
EXIST. FENCE LINE
BLDG. 3162
BLDG. 3173
TO E.M.H. 6
E
E
E
E.M.H. 10
E
E
TO E.M.H. 11
E
GRASS AREA
GRASS AREA
E E
EE
FRONT
FR
ON
T
10'-0"
10'-0"
EXISTING TO REMAIN 15KV
CONDUCTORS
EXISTING TO REMAIN 15KV
CONDUCTORS
EXISTING TO BE REMOVED AND
NEW ITEM INSTALLED PROVIDE
15KV, 5 POSITION SF6 GAS
SWITCH, CONCRETE PAD, AND
ENCLOSURE SEE TYPICAL DETAIL
E3/E-501EXISTING TO BE REMOVED AND NEW ITEM
INSTALLED PROVIDE 15KV, 300AMP, 4
POSITION SF6 GAS SWITCH, CONCRETE
PAD, AND ENCLOSURE SEE TYPICAL
DETAIL E3/E-501
EXISTING TO REMAIN 15KV
CONDUCTORS
EXISTING TO REMAIN
BOLLARD (TYP. 3 PLCS.)
SEE DETAIL E8/E-501
EXISTING TO REMAIN
OVERHEAD LINE (USAF)
DE
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ELECT DIST
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E-401
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US COAST GUARD
CIVIL ENGINEERING
C2 ENLARGED SITE PLAN H.H. 1/SWITCH 86937
SCALE: 1" = 10'
NORTH
PLAN
TR
UE
N 0 10' 20'
C7 ENLARGED SITE PLAN E.M.H. 10/SWITCH 86936
SCALE: 1" = 10'
3"
R
R
NUMBER OF CONDUITS SHALL BE
DETERMINED BY THE NUMBER OF
SWITCH POSITIONS AS INDICATED
ON THE ONE LINE DIAGRAMS.3/4" X 10' GROUND
ROD (TYP.)
1/0 BARE CU GROUND WIRE
INSTALL 12" BELOW GRADE.
SWITCH ENCLOSURE.
* PAD SIZE AND CONDUIT SPACINGS TO BE
FIELD DETERMINED BY CONTRACTOR FOR
TYPE OF SWITCH PROVIDED.
ANCHOR SWITCH ENCLOSURE
TO CONCRETE PAD PER
MANUFACTURER'S SPECS.
ANCHOR BOLT SIZE &
SPACING PER MANUFACTURER'S
SPECS.
SWITCH ENCLOSURE
1" CHAMFER (TYP.)
#5 @ 12" E.W. T.& B.
6" COMPACTED
CRUSHED 2" STONE.
4"
6" 4"
3"
3" (TYP.)
2"
2"
ALL CONDUITS AND/OR
SWEEPS SHALL BE 4"
RGS WITH THREADED
GROUND BUSHINGS.
GAS SWITCH
OUTLINE
1/0 BARE CU GROUND WIRE
TO SWITCH ENCLOSURE.
4" SCHEDULE 80
CONCRETE FILLED STEEL
PIPE POSTS. PAINT
SAFETY YELLOW.
4'-0"
DIRT
CONCRETE
6"
3'-6"
6"
6"
1"
WASH
COVER
24" MINIMUM
FINISH GRADE
CONCRETE
6" X 6" X W2.9 X W2.9
(TWO LAYERS)
WELDED WIRE FABRIC
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ELECT DIST
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E3 EXISTING GAS SWITCH PAD (TYP.)
SCALE: N.T.S.
A3 SECTION VIEW
EXISTING GAS SWITCH PAD (TYP.)
SCALE: N.T.S.
A8 EXISTING DUCT BANK (TYP.)
SCALE: N.T.S.
E8 EXISTING BOLLARD DETAIL (TYP.)
SCALE: N.T.S.
E.M.H. 2
H.H. 1
E.M.H. 1 E.M.H. 5
E.M.H. 3 E.M.H. 4
E.M.H. 7 E.M.H. 8 E.M.H. 9E.M.H. 6
E.M.H. 11 H.H. 2
EXISTING TO BE
REMOVED AND NEW
ITEM INSTALLED
PROVIDE 5-POS. 15KV
SWITCH 86936
EXISTING TO REMAIN (TYP. ALL)
EXISTING TO REMAIN
LOAD BREAK ELBOW
TERMINATIONS (TYP.)
EXISTING TO
REMAIN
BLDG. 3172
HANGER
500KVA, 3Ø
4,160 -480Y/277V
EXISTING TO REMAIN BLDG. 3170
HANGER 500KVA, 3Ø 4,160 -480Y/277V
E.M.H. 10
EXISTING TO
REMAIN 45KVA,
3Ø 4,160 -208Y/120V
EXISTING TO
REMAIN
REFUEL BLDG.
45KVA, 1Ø
2400-240/120V
EXISTING TO
REMAIN 1000 KVA,
3Ø
23,860GRDY/13200-4160Y/2400
EXISTING TO REMAIN
U.S.A.F OVERHEAD LINE
4,160V, 3Ø, #6 CU.
EXISTING TO REMAIN
15KV 600A S&C AIR
INTERRUPTER SWITCH
(U.S.A.F.)
TO F.A.A. RADAR SITE
EXISTING TO REMAIN LOAD
BREAK ELBOW TERMINATIONS
(TYP.)
EXISTING TO BE
REMOVED AND NEW
ITEM INSTALLED
PROVIDE 4-POS.
15KV SWITCH 86937
EXISTING TO REMAIN
LIFT STATION
112.5KVA, 3Ø 4,160
-208Y/120V
EXISTING TO REMAIN
300KVA TRANSFORMER
EXISTING TO BE REMOVED AND NEW
ITEM INSTALLED PROVIDE LOAD BREAK
ELBOW TERMINATIONS (TYP.)
EXISTING TO
REMAIN
BLDG. 3159
BARRACKS/GALLEY
300KVA, 3Ø 4,160
-208Y/120V
EXISTING TO REMAIN
U.S.A.F OVERHEAD LINE
4,160V, 3Ø, #6 CU.
EXISTING TO
REMAIN PROVIDE
15KV CABLES
EXISTING TO REMAIN
PROVIDE 15KV CABLES
EXISTING TO
REMAIN CAPS
EXISTING TO REMAIN
35KV DIRECT BURIAL
3-1/C, #1/0 A.W.G., CU.
EXISTING TO REMAIN
INCOMING COM.
ED. FEEDER
EXISTING TO REMAIN
POINT OF SERVICE
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ELECT DIST
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N
BY
G
2 3 4 5 6 7 8 9 10
F
E
D
C
B
A
SH
EE
T
OF
US
CG
P
RO
JE
CT
N
UM
BE
R
US
CG
F
IL
EN
AM
E
A/ E
CO
M
PA
NY
CO
NS
UL
TI
NG
A
/E
US
CG
P
RO
JE
CT
M
AN
AG
ER
A/
E
PR
OJ
EC
T
NO
SHEET ID
M
EA
SU
RE
M
EN
T
BA
R:
1"
HA
LF
S
IZ
E
1/ 2"
US
CG
D
RA
W
IN
G
SE
RI
ES
N
UM
BE
R
C1 ONE-LINE DIAGRAM 4,160 VOLT SYSTEM - U.S.C.G.
SCALE: N.T.S.
| 2026-01-09T09:48:56-0500 | |
| DILL.DAVID.COLBY.1218495555 |
| 2026-01-09T10:39:08-0500 | |
| CAROSOTTO.MICHAEL.P.1021033398 |
File details come from the government source that posted it. Updated .