TB 162 - Metro Rail Regional Connector Phase Flashcards
The MRCTC project will provide an underground light rail system connecting the what to the 7th/Fig station?
Metro gold line
What is the expected completion date for the MRCTC?
2020
When did excavation for the tunnel construction begin?
September 2014
What are the 3 new underground stations that will be implemented in the project?
1st/central
2nd/broadway
2nd place/Hope
What is the budget for the project?
1.366 billion dollars
How long is the addition from
The metro rails little Tokyo/arts district to the 7th/fig station?
1.9 miles
The connector will provide a 1 seat ride between Azusa and what between east LA and Santa Monica (phase II) without transferring lines?
Long Beach
The what site is located between the 1st and alameda branches of the alignment?
“Mangrove”
The what will provide the design build contractors use and space for a tunnel boring machine (TBM)?
“Mangrove”
The 1st street/central avenue cut and cover station ends beneath the intersection of 1st and alameda, the alignment splits into how many directions?
2
The what will be constructed by cut-and-cover excavation methods, with branches extending to east and north?
“Wye” (2 legs of a true eye)
The eastern branch extends approximately how many feet within a cut-and-cover excavation to the beginning of an open trench structure?
419 feet
The open trench structure extends approximately how many feet father east toward the end of the alignment along 1st street?
401 feet
The northern branch adjacent to alameda street extends approximately how many feet within a cut and cover excavation to the beginning of an open trench structure?
812 feet
The open trench structure extends approximately how many feet farther north to the beginning of an above grade section?
409 feet
The depth of the excavation will range from a few feet approximately how many feet farther north to the beginning of an above grade section?
409 feet
The depth of the excavation will range from a few feet to approximately how many feet?
45 feet
Along the 1,354 foot long section of the cut and cover tunnels (flower street), the depth of the excavation will range approximately how many feet?
50 to 55 feet
For the 1st/central station, the depth of the excavation will be approximately how many feet below existing ground surface?
45 to 50 feet
For the 2nd/broadway station, the depth of the excavation will be approximately how many feet below existing ground surface?
95 to 100 feet
For the 2nd/Hope station, the depth of the excavation is approximately how many feet below the sidewalk elevation adjacent to hope and general Thaddeus kosciuszko way?
105 feet
For the 2nd/Hope street station, the depth of the excavation will be approximately how many feet below the existing ground surface at the west end of the station?
85 feet
Where is the 1 minded crossover structure located?
Immediately east of the 2nd street/broadway station
The 1 minded cross over structure is how many feet in length?
289 feet
The finished internal dimensions of the 1 minded crossover structure would be approximately how many feet wide and high?
56 feet wide
30 feet high
Ground cover over the cavern is approximately how many feet?
60 feet
Cross over caverns are anticipated that they will be constructed using what to enlarge the previously bored tunnels?
Sequential evacuation methods (SEM)
There is a possibility that during tunneling operation, pockets of what gas may be encountered?
Methane
Cal OSHA has listed the project as what and has identified hazard mitigation through use of a ventilation system and constant air monitoring?
“Potentially gassy”
All what will run the entire length of the tunnel?
Utilities
How large of a pipe provides a water system for cooling the TBM and water for firefighting operations?
46”
The project is equipped with 2 1/2” NST outlets every how many feet?
200 feet
Intrinsically safe fans with how many CFMs provide ventilation and evacuation air from the tunnel through a 66” pipe?
100,000 cfms
The limits of the stations, crossover cavern, 2 end sections and the cut and cover tunnel section result in 3 reached of what bored tunnels?
Twin bored tunnels
The TBM provide an excavation diameter of how many feet?
22 feet
What reach extends from 1st/central to a crossover cavern a distance of 2,273 feet?
Reach 1
For reach 1, the depth of cover will range from approximately how many feet tunnel crown and existing ground surface?
2 to 65 feet
What reach extends east/southeast from 2nd/Hope a distance of 1,630 feet?
Reach 2
Reach 2 has a depth of cover ranges from approximately how many feet along this reach?
70 to 130 feet
From 2nd/Hope station, a distance from tunnel crown to storm drain invert approximately how many feet?
25 to 45 feet
What reach extends a distance of 1,035 feet with one cross passage at the 1st/central station?
Reach 3
Reach 3 will be beneath south flower street with a depth cover ranging from approximately how many feet?
30 to 60 feet
What 3 portals of entry during construction of the MRCTC project will the fire department respond to?
1st/central
2nd/broadway
2nd/Hope
Entry portals are how many feet deep and equipped with extinguishing systems, fire detection devices, and emergency lighting?
45 to 90 feet
Adjacent to the entry portal, a tag/in/tag out system used for employee accountability is known as what?
“Brass board”
Each TBM has approximately how many miners with additional personnel above ground?
10 miners
During shift change how many personnel may be on site?
50 to 75
Hours of operation will vary dependent on what?
Noise and traffic restrictions
There is a 13,200 volt AC supply in the tunnel that is transformed down to how many volts?
480 volts
The main panel for the project is located at what site?
Mangrove site
In order to turn off system, who must you confer with?
Site engineer
Hard-wired mining phones during the tunnel operation are every how many feet as well as on the TBM and at cross passages and the portals?
800 to 1,000 feet
How many large scale fire type incidents occurred during the construction phase of the metro red line?
2
If the atmosphere in the tunnel is compromised, entry will be limited to who?
USAR certified members wearing re-breathers
Injured victims are to be brought outside of tunnel and will be lifted on a stokes litter basket by who at grade level?
Construction workers (crane operators)
Cal OSHA requires that tunneling contractors provide rescue team personnel of more than how many workers will be operating in a tunnel or shaft?
10 workers
The fire department ha agreed to be the rescue team per Cal OSHA because we meet the requirement of having a rescue team onsite within how many minutes?
30 minutes
MFC will dispatch who for reported incidents in the tunnel or shaft during construction phase?
3 engines 2 LF 2 BCs 1 ALS RA 1 squad 1 heavy rescue 1 tunnel utility 1 tunnel utility certified engine 1 USAR group
Tunnel rescue requirements are restrictive and carefully monitored by who?
Cal OSHA
For all fire and EMS incidents that occur below grade will require what PPE?
Full PPE
Fire department members may enter the tunnel to affect a rescue as long as they comply with CCR title 8, section what sub chapter 20-tunnel safety orders?
8430
First responders in order to facilitate a rescue may utilize on site what to determine atmospheric levels?
Monitoring experts
By law all personnel who enter a mining site must wear a how long of a self rescue device to provide a means for escape from a hazardous non-breathable atmosphere?
1 hour
For fire personnel the breathing apparatus policy is predicated on what 2 possible atmospheric conditions?
Non compromised and compromised
First responders may obtain tunnel atmospheric information from who?
A regional connector constructors underground safety officer, supervisor, MTA inspector or from the gas indicators in the onsite construction trailer
If the fire department issued 3-gas monitor registers an alarm, the area should be considered a compromised atmosphere as the monitor is pre set for allowable levels of what?
Oxygen, CO, and LEL
What are maintained and stored at each portal entry by the contractor for the specific use of fire personnel?
Self rescuer respirators
The self rescuer respirators for the fire department keep rescuers compliant with the law by having a separate how many hour method of escape breathing capacity?
1 hour
Types of incidents with a non-compromised atmosphere where members must wear an SCBA and a self rescue device are what?
EMS
Physical extrication equipment
Confined space rescue
Collapse or flooding
An SCBA and self rescuer respirators is required and personnel are limited to initial observation of atmospheric testing for what conditions in a compromised atmosphere?
2 member team in sight of opening
4 member team if they will be out of sight of opening
A back up team is standing by
If the entry does not exceed 500 feet
Members entering a compromised atmosphere are limited to how many minutes of work with a 45 and 60 minute bottle?
45 min bottle: 9 minutes
60 min bottle: 12 minutes
Entry into a tunnel with a known compromised atmosphere beyond initial observation or atmospheric testing is limited to what certified members only?
USAR
Certified USAR members must utilize what periodically in a tunnel that has a compromised atmosphere?
Drager re-breathers and take gas readings periodically
If a fire or explosion occurs in the tunnel, re breathers are not acceptable because who does not certify them as a firefighting breathing apparatus?
NIOSH
USAR entry teams may use either what for entering a compromised atmosphere for respiratory protection?
Positive pressure breathing apparatus or supplied air (air cart)
Where is the tunnel utility assigned to which is an RA with 18 drager re-breathers?
Fire station 88
The IC shall evaluate a what in initiating a direct fire attack?
Risk versus gain
A 6 inch temporary pipe supplied by a hydrant with 2 1/2” outlets every how many feet with FDCs located next to hydrant at ground level make up the water system during construction?
200 feet
Engineers shall pump a maximum of what PSI into the FDCs?
150 psi
The second arriving company will establish staging where?
Above ground in close proximity to the portal opening
The third arriving company will operate in the portal adjacent to the tunnel and is responsible for what?
Technical support
Technical support is augmented with USAR certified staffing from the first arriving what?
USAR taskforce
First arriving USAR taskforce officer established what in the portal adjacent to tunnel?
Tunnel division
The remainder of the first arriving USAR task force will prepare for what?
Tunnel entry operations
Operations when implemented, normally operates at what level in proximity to command post?
Surface level
Who reports to operations?
Tunnel division/branch, perimeter control, hazmat group, fire suppression group, medical group/branch, and staging
Tunnel division will ensure that all emergency operations are discontinued and the tunnel evacuated should the tunnel atmosphere meet or exceed what percentage LEL?
20%
What is logistics responsible for?
Flow of equipment to support incident, control utilities, units under their supervision are functioning properly
Base may be established by available what from the first alarm assignment?
Engineers
Where will the equipment pool be located?
Adjacent to the vertical shaft
Where will lobby/systems control be located?
In contractors trailers
What 3 intrinsically safe methods of electronic communications are there within the tunnel?
Contractor hardwire communication system
USAR confined space communications system
LAFD 800 MHZ radio
Every how many feet within the tunnel at each portal, station box and at cross passages are there contractor hardwire telephones?
1000 feet
USAR confined space communications system have how many feet of wire fire communication?
Over 1000 feet
LAFD 800 MHz radios will only be useful in what mode of line of sight?
Direct mode
An entry tram are comprised of how many members?
Usually 6 but not less than 4
Do entry teams all need to be from the same company?
Not necessarily, based on physical capabilities and experience
