Training Bulletin 162: Metro Rail Regional Connector Construction Phase

Question 1

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.

Answer 1

Gold line

Question 2

Tunnel construction and excavation began in

Answer 2

September 2014 with an expected completion date of 2020.

Question 3

MRCTC features include:

Answer 3

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

Question 4

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.

Answer 4

Little tokyo/arts district

Gold, blue, expo, red, purple

Question 5

How long is the addition

Answer 5

1.9 miles

Question 6

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

Answer 6

Mangrove

Question 7

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?

Answer 7

east end “wye”

Question 8

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

Answer 8

East and north

Question 9

East end wye- The eastern branch extends approximately

Answer 9

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

Question 10

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

Answer 10

401

Question 11

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

Answer 11

812

Question 12

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

Answer 12

409

Question 13

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

Answer 13

45

Question 14

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

Answer 14

Flower Street Cut-and-Cover

Question 15

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.

Answer 15

1354 feet

50-55

Question 16

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

Answer 16

Center platform

South flower street
South hope street

Question 17

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

Answer 17

105 feet

85 feet

Question 18

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.

Answer 18

95-100 feet

Question 19

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

Answer 19

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

Question 20

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.

Answer 20

289 feet

56 feet wide and 30 feet high

60feet

Question 21

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

Answer 21

Sequential evacuation methods

Question 22

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.

Answer 22

Potentially gassy

Methane gas

intrinsically

Question 23

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.

Answer 23

46”

2 1/2”

200

Question 24

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

Answer 24

100,000

66”

Question 25

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.

Answer 25

Three reaches

Question 26

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.

Answer 26

22 feet

Question 27

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.

Answer 27

East Reach 1

Question 28

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

Answer 28

2,273 feet

Question 29

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

Answer 29

2-65 feet Two cross passages

Question 30

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.

Answer 30

1,630 feet 70-130 feet

Question 31

This reach includes one cross-passage.

Answer 31

Reach 2 | Reach 3

Question 32

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.

Answer 32

25-45 feet Red line

Question 33

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

Answer 33

1,035 feet

Question 34

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

Answer 34

Reach 3

Question 35

Reach 3 depth of cover ranging from approximately

Answer 35

30-60 feet

Question 36

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

Answer 36

Three

Question 37

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

Answer 37

45-90 feet

Question 38

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

Answer 38

Enclosed ladder Construction elevator

Question 39

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

Answer 39

Brass board

Question 40

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.

Answer 40

Brass board

Question 41

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

Answer 41

10

Question 42

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

Answer 42

50-75

Question 43

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 ______.

Answer 43

13,200 volts 480 volts Mangrove site Engineer

Question 44

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.

Answer 44

800-1,000 feet

Question 45

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

Answer 45

US&R re-breathers

Question 46

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.

Answer 46

10 Fire department 30mins

Question 47

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

Answer 47

``` 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) ```

Question 48

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

Answer 48

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

Question 49

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.

Answer 49

One hour

Question 50

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

Answer 50

non-compromised and compromised

Question 51

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 __%) ```

Answer 51

19.5-23 25ppm 10ppm 5ppm 5% 10%

Question 52

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 ___’.

Answer 52

2 4 Back up team 500

Question 53

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.

Answer 53

12 mins 60min 9 mins 45 min

Question 54

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

Answer 54

US&R certified members only.

Question 55

The Tunnel Utility will be assigned to

Answer 55

Fire Station 88.

Question 56

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.

Answer 56

18 Cyalume

Question 57

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.

Answer 57

6” 2 1/2” 200 Hydrant 150 psi Sump pump

Question 58

``` 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 ```

Answer 58

Conditions/problems Number of people Gas Ventilation Electrical Communication Light Water Compressed air Tunnel boring Muck

Question 59

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

Answer 59

Second Arriving Company

Question 60

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

Answer 60

Third Arriving Company

Question 61

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

Answer 61

First Arriving US&R Certified Compa

Question 62

assumes the duties of Incident Commander.

Answer 62

First arriving Battalion Chief

Question 63

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

Answer 63

Second arriving Battalion Chief

Question 64

may be assigned as Tunnel Division.

Answer 64

Third arriving Battalion Chief

Question 65

may be assigned as the Logistic Section Chief.

Answer 65

Fourth arriving Battalion Chief

Question 66

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.)].

Answer 66

First arriving Assistant Chief

Question 67

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.

Answer 67

Tunnel Incident Command System

Question 68

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

Answer 68

Incident Commander

Question 69

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

Answer 69

Operations

Question 70

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

Answer 70

Staging

Question 71

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

Answer 71

Tunnel Division/Branch

Question 72

The Back-up Entry Team reports to

Answer 72

Tunnel Division

Question 73

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

Answer 73

Entry Coordinator

Question 74

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

Answer 74

Perimeter Control

Question 75

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

Answer 75

Logistics

Question 76

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

Answer 76

Support Branch

Question 77

Missions may include: Movement of equipment in and out of the excavation. Hoisting the litter basket out of the excavation.

Answer 77

Crane Operator Coordinator

Question 78

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

Answer 78

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