11/20/2012

DCMP 11 17 2012

The signal installation problem at some of the interlockings has been solved. The contractor attached an L bracket to the inside of the barrier wall above the cable trench and mounted the signal mast base on top of the L brackets. A flexible conduit extends down from the under side of the bracket into the cable trench.

The feeler car is now located in the Falls Church Yard. This could mean that WMATA is close to making the first run on the route under third rail power. Word has it this move should happen before the middle of December.

This would make sense because all of the traction power substations from the junction and along the Dulles Connector Road VA-267 are in place and have been connected to the third rail. All of the cables connecting the tiebreaker and substation along Dolley Madison Boulevard and Chain Bridge Road VA-267 including the inside to outside third rail jumper cables are in place. All of the traction power substations and jumper cables are in place along Leesburg Pike VA-7 and the Dulles Access Road all the way to the Wiehle-Reston East station. The only location where third rail cables have not been installed is between the substation and the interlocking west of the Spring Hill station.

It is not uncommon to test the traction power distribution system using trains prior to having the train control and signaling system up and running.

All of the signals have been installed between the junction and the McLean station and along the Dulles Access Road west of Leesburg Pike. The signals protecting the interlocking west of the Spring Hill station did not appear to be installed yet, I am unable to see the interlocking west of the Tysons Corner station so I can not tell what the progress is there.

The 5 pedestrian bridges at the McLean, Greensboro and Wiehle-Reston East stations have been installed. One span at Wiehle-Reston East, north side, is awaiting the contractor building the Reston Station development. The pedestrian bridge for the north side at Spring Hill was being assembled on the ground. The entrance pavilions at Spring Hill are not totally done and are still awaiting their architectural precast concrete. The contractor was starting the assembly of the canopy over the entrance pavilion at the McLean station.

Escalators have been installed in the entrance pavilions at McLean, Greensboro north entrance and Wiehle-Reston East south entrance. The only entrance pavilions where work is being done on the elevators is at the McLean station.

So far I have noticed two incorrectly fabricated architectural precast concrete panel. At first I thought it one of them was installed upside down, on closer inspection it has the darker bands one course lower then the others on the first one I noticed and two courses higher on the other.

The platform canopies have been installed at the McLean station. Progress is well under way at the Spring Hill station. The mezzanine and platform canopies at Greensboro and Tysons Corner are nearly done.

Most of the architectural steelwork at the McLean station has been installed

The right of way intrusion detection system cables on the fences from the junction to the east abutment at Old Chain Road have been installed. Form the west abutment west of Leesburg Pike to the tail tracks west of the Wiehle-Reston East station the installation is about 95 percent done.

Chaining signs have been installed along the right of way as far west as Hunter Mill Road a T/B (Turn Back) sign has been installed west of the yard lead junction. Various signs that identify the location of train control boundaries have been installed.

Based on my latest observations the RTUs (Remote Terminal Unit) are as follows:

K98 K&N Junction
N91 Plainfield Street (Fall Church Yard Lead)
N92 Baldwin Drive (Dulles Connector Road)
N01 McLean (Tysons East)
N02 Tysons Corner (Tysons Central 123)
N03 Greensboro (Tysons Central 7)
N04 Spring Hill (Tysons West)
N05 Wolf Trap
N93 Chatham Ford Drive
N94 Hunter Mill
N95 Sunset Hill Road
N06 Wiehle-Reston East (Wiehle Avenue)

In the curve east of the Hunter Mill Road overpass and in the curve west of the Beulah Road overpass the elevation of inbound track N1 is lower then the elevation of outbound track N2.

The structure built to house post-tension segment casting plant at Dulles International Airport is still standing, however all of the equipment used to do the casting and handling of the segments has been removed.

Published 11 20 2012

VA I-66 and VA-267 Dulles Connector Road:
VA I-66 flyover. VA-267 flyover north of VA I-66 outbound track 2. Feeler car aka clearance checking car in Fall Church Yard track 6.
South portal Falls Church Yard lead. South portal Falls Church Yard lead. VA-267 Dulles Connector Road, west abutments outbound track N2.
VA-267 Dulles Connector Road, Fall Church Church Yard lead (Plainfield Street) interlocking. VA-267 Dulles Connector Road, signals protecting west end of Baldwin Drive interlocking.

Dolley Madison Boulevard VA-123 and McLean station:
VA-123 Dolley Madison Boulevard west of VA-267 Dulles Connector Road. VA-123 Dolley Madison Boulevard at Anderson Road. VA-123 Dolley Madison Boulevard, signals protecting west end of Anderson Road interlocking.
McLean station entrance pavilion and pedestrian bridge. McLean station entrance pavilion. McLean station entrance pavilion.
McLean station entrance pavilion. McLean station entrance pavilion. McLean station entrance pavilion.
McLean station entrance pavilion canopy installation. Underside of escalators McLean station entrance pavilion. notice architectural precast concrete fabrication error. Elevators McLean station entrance pavilion. again notice architectural precast concrete fabrication error.
McLean station entrance pavilion and pedestrian bridge. McLean station entrance pavilion and pedestrian bridge. McLean station entrance pavilion and pedestrian bridge.
McLean station entrance pavilion and pedestrian bridge. McLean station entrance pavilion and pedestrian bridge. McLean station and pedestrian bridge.
McLean station and pedestrian bridge. McLean station surface entrance under pedestrian bridge. McLean station surface to mezzanine escalators.
McLean station surface to mezzanine elevators.
McLean station mezzanine and pedestrian bridge. McLean station.
McLean station surface entrance, mezzanine and pedestrian bridge. McLean station surface entrance and pedestrian bridge. McLean station entrance pavilion and pedestrian bridge.
McLean station mezzanine and pedestrian bridge. McLean station mezzanine. McLean station mezzanine and pedestrian bridge.
McLean station mezzanine and pedestrian bridge. McLean station Capitol One Drive.. McLean station emergency exit Capitol One Drive.
McLean station emergency exit Capitol One Drive.

Chain Bridge Road VA-123 and Tysons Corner station:
Elevated crossing VA I-495 Capitol Beltway at VA-123 Dolley Madison Boulevard. Tysons Corner station emergency exit east end of platform. Tysons Corner station emergency exit east end of platform.
Tysons Corner station and Entrance Pavilion. Tysons Corner station and pedestrian bridge columns. Tysons Corner station and pedestrian bridge columns.
Tysons Corner station entrance pavilion. Tysons Corner station entrance pavilion. Tysons Corner station entrance pavilion.
Tysons Corner station.

Leesburg Pike VA-7 Greensboro station:
Greensboro Station. Greensboro Station north pedestrian bridge. Greensboro Station north entrance pavilion.
Greensboro Station north entrance pavilion. Greensboro Station north pedestrian bridge. Greensboro Station north pedestrian bridge.
Greensboro Station mezzanine and platform canopy. Greensboro Station mezzanine and platform canopy. Greensboro Station mezzanine and platform canopy, south pedestrian bridge and entrance pavilion.
Greensboro Station south entrance pavilion and pedestrian bridge. Greensboro Station south pedestrian bridge. Greensboro Station south entrance pavilion and pedestrian bridge.
Greensboro Station south entrance pavilion and pedestrian bridge. Greensboro Station south entrance pavilion and pedestrian bridge. Greensboro Station mezzanine and platform canopy.

Leesburg Pike VA-7 Spring Hill station:
Spring Hill station. Spring Hill station mezzanine. Spring Hill station mezzanine.
Spring Hill station north entrance pavilion. Spring Hill station north entrance pavilion, partly fabricated pedestrian bridge. Spring Hill station south entrance pavilion.
Spring Hill station mezzanine. Spring Hill station south entrance pavilion. Spring Hill station south entrance pavilion.
Spring Hill station south entrance pavilion. Spring Hill station south entrance pavilion. Spring Hill station.
Spring Hill station.

Dulles Access Road:
West Abutment median of Dulles Access Road. Median of Dulles Access Road west of west abutment. Chatham Ford Road interlocking.
West of Beulah Road overpass.

Wiehle-Reston East station:
Wiehle-Reston East station north entrance pedestrian bridges. Wiehle-Reston East station entrance pedestrian bridges. Wiehle-Reston East station north entrance pedestrian bridges.
Wiehle-Reston East station south entrance pavilion and pedestrian bridges. Wiehle-Reston East station south entrance pavilion and pedestrian bridges. Wiehle-Reston East station south entrance pavilion and pedestrian bridge.
Wiehle-Reston East station south entrance pedestrian bridges. Wiehle-Reston East station pocket and tail tracks.
End of track signal west of Wiehle-Reston East station track N2. This is the L bracket signal mounting solution.
Pictures at picasaweb.google.com/cambronj 11 17 1011

3 comments:

  1. I'm happy to see Tysons finally get some sort of rapid transit, but a small part of me wishes the area never urbanizes just to show politicians how stupid it was to do this project on the cheap.

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  2. @blueblu:

    I will reserve comment on "do this project on the cheap" until the train start carrying paying passengers. There are a few element that were deleted during the final design that would have made operations more flexible and a few things that I think should have been designed differently. However based on my observation to date what is being built will be well worth every dollar spent.

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