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Training Bulletins > Training Bulletin 162: Metro Rail Regional Connector Construction Phase > Flashcards

Training Bulletin 162: Metro Rail Regional Connector Construction Phase Flashcards

1
Q

The Metro Regional Connector Transit Corridor Project (MRCTC Project) is an MTA Tunneling Project that will provide an underground light rail system, connecting Metro Rail’s ____ Line to the 7th Street/Figueroa (Metro Center) Street Metro Center in downtown Los Angeles.

A

Gold line

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2
Q

Tunnel construction and excavation began in

A

September 2014 with an expected completion date of 2020.

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3
Q

MRCTC features include:

A

3 new underground stations (1st Street and Central Avenue, 2nd Street /Broadway Street, and 2nd Place/Hope Street)
Life-of-Project Budget: $1.366 billion
Forecasted opening: 2020

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4
Q

The MRCTC Project will extend from Metro Rail’s ____ _____/___ ______Station to the 7th Street/Metro Center in downtown Los Angeles, allowing passengers to access the ____, ____, ____, ____, and _____ Lines.

A

Little tokyo/arts district

Gold, blue, expo, red, purple

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5
Q

How long is the addition

A

1.9 miles

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6
Q

The “_____” site is located between the 1st Street and Alameda branches of the alignment.

A

Mangrove

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7
Q

Where the 1st Street/Central Avenue cut-and-cover station ends beneath the intersection of 1st Street and Alameda Street, the alignment splits into two directions. Is known as?

A

east end “wye”

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8
Q

This “Wye” (two legs of a true wye) will be constructed by cut-and-cover excavation methods, with branches extending to the

A

East and north

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9
Q

East end wye- The eastern branch extends approximately

A

419 feet within a cut-and-cover excavation, to the beginning of an open trench structure.

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10
Q

The open trench structure extends approximately ___ feet farther east, toward the end of the alignment along 1st Street.

A

401

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11
Q

The northern branch (adjacent to Alameda Street) extends approximately ____feet within a cut-and-cover excavation, to the beginning of an open trench structure.

A

812

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12
Q

The open trench structure extends approximately ____feet farther north, to the beginning of an above grade section.

A

409

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13
Q

East end wye- The depth of excavation will range from a few feet to approximately ___feet.

A

45

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14
Q

From this intersection to the southwest end of the bored tunnels, construction of the twin tunnels will be performed by cut-and-cover methods.

A

Flower Street Cut-and-Cover

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15
Q

Flower street cut and cover-
Along this ____ foot long section of cut-and-cover tunnels, the depth of excavation will range from approximately __to __ feet.

A

1354 feet

50-55

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16
Q

The 2nd Street/Hope Street Station is an underground Light Rail Train (LRT) ____ _____station and is diagonally oriented between south ____Street and South ___ Street.

A

Center platform

South flower street
South hope street

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17
Q

The depth of the excavation Of the 2nd Street/Hope Street Station is approximately ____feet below the sidewalk elevation adjacent to Hope Street and General Thaddeus Kosciuszko Way (GTK Way) and approximately ___ feet below the existing ground surface at the west end of the station

A

105 feet

85 feet

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18
Q

2nd Street/Broadway Street Station will be constructed using conventional cut-and-cover construction methods, and the depth of excavation will be approximately __ to __ feet below the existing ground surface.

A

95-100 feet

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19
Q

The MRCTC Project includes one mined crossover structure, which is located

A

immediately east of the 2nd Street/Broadway Street Station.

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20
Q

The crossover cavern is ____ feet in length and the finished internal dimensions of the cavern would be approximately __feet wide and __ feet high. Ground cover over the cavern is approximately __ feet.

A

289 feet

56 feet wide and 30 feet high

60feet

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21
Q

The crossover cavern- It is anticipated that this structure will be constructed using ______ _____ _____ (SEM) to enlarge the previously bored tunnels.

A

Sequential evacuation methods

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22
Q

The crossover cavern project has been listed as ______ by cal osha because of the possibility of _____ gas being encountered. Cal osha identified hazard mitigation through the use of a ventilation system and constant air monitoring. This means that all ______ safe devices are used.

A

Potentially gassy

Methane gas

intrinsically

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23
Q

A ___” water supply system provides cooling for the TBM and water for firefighting operations. This system is equipped with ___” NST outlets every ___’ within the tunnel and a Fire Department Connection (FDC) located aboveground next to an accessible hydrant location.

A

46”

2 1/2”

200

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24
Q

Compromised atmospheres are the greatest risk in tunnel construction; intrinsically safe fans (_____ cfm) provide ventilation and evacuation air from the tunnel through a __” vent pipe

A

100,000

66”

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25
Q

The limits of the stations, crossover cavern, the two end sections, and the cut-and-cover tunnel section result in ____reaches of twin-bored tunnels.

A

Three reaches

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26
Q

These tunnels are required to be constructed with a pressurized-face TBM and will have an excavated diameter of approximately __ feet, and a widely variable depth of cover.

A

22 feet

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27
Q

Because it is required that the tunnels would be driven starting at the ____ end of the project, these reaches are numbered herein starting with ____ at the east.

A

East

Reach 1

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28
Q

Reach 1 extends from the 1st Street/Central Avenue Station to a crossover cavern a distance of

A

2,273 feet

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29
Q

Reach 1s depth of cover will range from approximately __ to __ feet tunnel crown and existing ground surface. It includes _____ _______

A

2-65 feet

Two cross passages

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30
Q

Reach 2 extends east/southeast from the 2nd Street/Hope Street Station, a distance of _____ feet. The depth of cover ranges from approximately __ feet to ___ feet along this reach.

A

1,630 feet

70-130 feet

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31
Q

This reach includes one cross-passage.

A

Reach 2

Reach 3

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32
Q

Reach 2- From the 2nd Street and Hope Street Station, a distance from tunnel crown to storm drain invert of approximately __ to __ feet. Where the RCC tunnels cross beneath Hill Street, they will cross under the existing Metro __ Line tunnels.

A

25-45 feet

Red line

33
Q

Reach 3 extends a distance of ____ feet with one cross-passage at the 1st Street/Central Avenue Station.

A

1,035 feet

34
Q

The majority of the tunnel reach will be beneath South Flower Street

A

Reach 3

35
Q

Reach 3 depth of cover ranging from approximately

A

30-60 feet

36
Q

The Fire Department will respond to ____ portal entries during the construction of the MRCTC Project.

A

Three

37
Q

Entry portals are __ to __ feet deep, equipped with extinguishing systems, fire detection devices, and emergency lighting.

A

45-90 feet

38
Q

Access into the portals is by OSHA compliant stairway-____ ____ and/or a ____ ____.

A

Enclosed ladder

Construction elevator

39
Q

Adjacent to the entry portal by the elevator and ladder is the

A

Brass board

40
Q

This is the tag-in/tag-out system used for employee accountability and is a reference for first responders to determine who is working in the tunnel.

A

Brass board

41
Q

Each TBM has a crew of approximately __ miners with additional personnel aboveground.

A

10

42
Q

During shift change, __to ____personnel may be on-site.

A

50-75

43
Q

There is a ____-volt AC supply in the tunnel that is transformed down to ____volts. The main panel is located in the portal at the _____ site. Do not turn off system; confer with the Site ______.

A

13,200 volts

480 volts

Mangrove site

Engineer

44
Q

The contractor maintains a hard-wired mining phone system during the tunneling operation. It is equipped with a phone every ___ to ____ feet in the tunnel, as well as on the TBM, at the cross-passages and the portals.

A

800-1,000 feet

45
Q

SOPs- Note: if the atmosphere in the tunnel is compromised, entry will be limited to ___ certified members wearing _______.

A

US&R

re-breathers

46
Q

Cal/OSHA requires that tunneling contractors provide rescue team personnel that meet specified training requirements if more than __workers will be operating in a Tunnel or Shaft. The ______ has agreed to be that rescue team as we can meet the requirement of having a rescue team on site within __ minutes.

A

10

Fire department

30mins

47
Q

The MFC Dispatch algorithm for reported incidents in the tunnel or shaft during the construction phase will be:

A 
3 Engines
2 Light Forces
2 Battalion Chiefs
1 Paramedic Rescue
1 Squad
1 Heavy Rescue
1 Tunnel Utility
1 Tunnel Utility Certified Engine
1 US&R Group (US&R trained TF with US&R Apparatus, US&R 88 Tender, ALS Rescue, BLS Rescue, and a BC)
48
Q

According to the Principal Engineer for the State of California and Cal/OSHA Mining and Tunneling Unit, Fire Department members may enter the tunnel to affect a rescue as long as they comply with

A

CCR Title 8, Section 8430, Subchapter 20-Tunnel Safety Orders.

49
Q

By law, all personnel who enter a mining (tunneling) site must wear a ___ self-rescue device to provide a means for escape from a hazardous non-breathable atmosphere.

A

One hour

50
Q

For Fire personnel the breathing apparatus policy for “Tunnel Incidents” is predicated on two possible atmospheric conditions within the tunnel;

A

non-compromised and compromised

51
Q

All Fire personnel, provided they wear an SCBA and a Self-Rescuer respirator, may enter a tunnel with a non-compromised atmosphere:

Oxygen levels between \_\_\_-\_\_%
CO levels no greater than \_\_ ppm
H2S no greater than \_\_ ppm
NO2 no greater than \_\_ppm
CO2 levels no greater than \_\_%
LEL no greater than \_\_%)
A

19.5-23

25ppm

10ppm

5ppm

5%

10%

52
Q

Compromised Atmosphere
An SCBA and a Self-Rescuer respirator is required, however personnel are limited to initial observation or atmospheric testing with the following conditions:

A __-member team that is in sight of the tunnel or shaft opening.
A ___-member team, if they will be out of sight of the tunnel or shaft opening.
A ______is standing by.
Entry into a compromised atmosphere does not exceed a distance of ___’.

A

2

4

Back up team

500

53
Q

Members entering a compromised atmosphere under the above conditions are limited to __ minutes working time with a __-minute bottle and __ minutes with a __-minute bottle, thereby allowing sufficient air reserve to exit the tunnel.

A

12 mins

60min

9 mins

45 min

54
Q

Entry into a tunnel with a known compromised atmosphere beyond initial observation or atmospheric testing is limited to

A

US&R certified members only.

55
Q

The Tunnel Utility will be assigned to

A

Fire Station 88.

56
Q

The Tunnel Utility is a Fire Department Rescue Ambulance with __ complete Drager BG 4 re-breathers, ____ glow sticks, flashlights and other pertinent tools and equipment to support the use of the re-breathers.

A

18

Cyalume

57
Q

The water system in the tunnel, during construction will consist of:

A __inch temporary pipe supplied by a hydrant.
___ - inch NST Fire Department outlet every ___’.
Fire Department connection located next to the _____ at ground level.
Note: Engineers shall pump a maximum 0f __ psi into the Fire Department connections.
Small capacity air driven___ ____ that remove water seepage from the tunnel.

A

6”

2 1/2”

200

Hydrant

150 psi

Sump pump

58
Q 
Lobby/Systems Control will verify the following with the on-site supervisor:
\_\_\_\_\_/\_\_\_\_\_\_ – actions being taken
\_\_\_\_\_\_\_\_in the tunnel (check brass board)
\_\_\_readings
Condition of the:
- \_\_\_\_ system
- \_\_\_\_\_\_system
-\_\_\_\_\_\_\_system
- \_\_\_\_ system
- \_\_\_\_\_ system
- \_\_\_\_\_\_ \_\_\_\_ system
- \_\_\_\_\_ \_\_\_\_\_\_ Machine (operating or shut down)
- \_\_\_\_ train – operational and location
- Sump pump
A

Conditions/problems

Number of people

Gas

Ventilation

Electrical

Communication

Light

Water

Compressed air

Tunnel boring

Muck

59
Q

establishes Staging above ground in close proximity to the Portal opening.

A

Second Arriving Company

60
Q

This company will operate in the portal adjacent to the tunnel and is responsible for Technical Support.

A

Third Arriving Company

61
Q

The officer establishes Tunnel Division in the portal, adjacent to the tunnel. The remainder of the company will prepare for tunnel entry operations.

A

First Arriving US&R Certified Compa

62
Q

assumes the duties of Incident Commander.

A

First arriving Battalion Chief

63
Q

may be assigned as the Safety Officer to provide reconnaissance of the incident.

A

Second arriving Battalion Chief

64
Q

may be assigned as Tunnel Division.

A

Third arriving Battalion Chief

65
Q

may be assigned as the Logistic Section Chief.

A

Fourth arriving Battalion Chief

66
Q

will relieve the first arriving Battalion Chief and become the Incident Commander [first arriving Battalion Chief should remain at the Command Post and be utilized at the discretion of the Incident Commander (i.e., Deputy Incident Commander, Planning Chief, Operations Chief, etc.)].

A

First arriving Assistant Chief

67
Q

has many similarities to our High Rise, Hazardous Materials, and US&R command structures. The control, coordination, and documentation of entry teams, and the logistical requirements are conceptually the same.

A

Tunnel Incident Command System

68
Q

Manages the incident, requests resource, normally operates at surface level command post. Note: The Fire Department is in charge.

A

Incident Commander

69
Q

When implemented, normally operates at surface level in proximity to the command post. The Tunnel Division/Branch, Perimeter Control, Haz Mat Group, Fire Suppression Group, Medical Group/Branch, and Staging reports to Them when implemented

A

Operations

70
Q

reports to Operations and will operate above ground in close proximity to the Portal opening.

A

Staging

71
Q

is in charge of all below-ground operations. generally operates in the vertical shaft (not the tunnel).

A

Tunnel Division/Branch

72
Q

The Back-up Entry Team reports to

A

Tunnel Division

73
Q

reports to Tunnel Division and will operate in the Portal, directly adjacent to the tunnel.

A

Entry Coordinator

74
Q

will ensure that no unauthorized persons are allowed to enter the incident site. The function is normally assigned to law enforcement personnel.

A

Perimeter Control

75
Q

responsible for the flow of equipment to support the incident, the control of utilities, and assuring that units under their supervision are functioning properly.

A

Logistics

76
Q

Base, supplies(equipment pool) lobby/systems control, and utility control all are under the umbrella of?

A

Support Branch

77
Q

Missions may include:

Movement of equipment in and out of the excavation.
Hoisting the litter basket out of the excavation.

A

Crane Operator Coordinator

78
Q

There are three intrinsically safe methods of electronic communications within the tunnel:

A

1) Contractor hardwire communication system
2) US&R Confined Space Communications System –
3) LAFD 800 MHz radio.

Training Bulletins (47 decks)

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