DC Water 1st Street Tunnel Construction Update 2015 08 20

8/20/2019 DC Water 1st Street Tunnel Construction Update 2015 08 20

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Thursday, August 20, 2015

Briefing

for:

Briefing

on:

DC CLEAN RIVERS PROJECT

First

Street

Tunnel

Construction

Update

and

Community

Mitigation

Measures

First

Street

Tunnel

Forum/Community

Group

District of Columbia Water and Sewer AuthorityGeorge S. Hawkins, General Manager


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Tunnel ForumRepresentatives and Alternates

Location/Group Representative Alternate

First Street NW Dr. Marilyn Lashley Tomas Encaracion

Bryant / Channing Streets Renee Peres Philomena FritzFlagler Place Victoria Leonard Pia Brown

Adams Street Shelly Parker Dianne Barnes

W Street Joe Levesque Neal Herman

First and V Streets Angela Ray Theodore Bush and Derrick Jones

U Street Serita Sanders Jean Marie Thomas

Thomas St / Rhode Island Ave Chris Von Ferro Vacant

Local Blogs Scott Roberts Betsy McDaniel

Government Austin Pearl, ANC 5E Teri Janine Quinn, ANC 5E

Bertha Holliday, ANC 5E

Laisha Dougherty, Councilmember

McDuffie’s office, Ward 5

Civic Associations Sherry Howard John MacNeil

All meetings are open to the public. 2


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Welcome and Introductions

Meeting Dates for 2015 and 2016

Two-Month Construction Update at

Construction Staging Areas (CSAs) Channing Street CSA

Adams and Flagler CSA First and V CSA

First and Thomas CSA (Pumping Station)

Long-Range Construction Schedule

and Progress

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Update on CommunityMitigation Measures

Responses to Residents’

Concerns

Saturday Work

Security and Safety withinConstruction Staging Areas

First and V Streets CSA

published

Tree Planting Initiative Project Display Boards at Two

CSAs

FEMS Doorway Mural Project

Next Steps/Save the Date

Agenda


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MEETING

DATES

FOR

2015

AND

2016

Tom Lindberg and John Kennedy, DC Water


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Meeting Dates for 2015 and 2016

Discussion Topic Meeting Date* Location

First Street Tunnel (FST) Project Update January 22, 2015 St. George’s Episcopal Church

Naming of the Tunnel Boring Machine (TBM) February 26, 2015 First Street Tunnel Project Office

FST update, TBM Naming Process and Ceremony March 26, 2015 St. George’s Episcopal Church

TBM Naming Ceremony April 14, 2015 Channing Street CSA

FST update, TBM naming ceremony, small diameter

water main project, Doors of Perception murals at

Adams St CSA

May 28, 2015 St. George’s Episcopal Church

Construction Update for Adams Street and Flagler

Place Residents

June 10, 2015 Adams Street Construction

Staging Area

Proposal to Extend Construction Work Hours June 27, 2015 St. George’s Episcopal Church

FST Project Update August 20, 2015 St. George’s Episcopal Church

FST Update and Landscaping and Restoration Plans October 22, 2015 St. George’s Episcopal Church

FST Hard Hat Site Tour October 24, 2015 Assembly location TBD

FST Update and Landscaping and Restoration Plans January 22, 2016 St. George’s Episcopal Church

FST Update and Landscaping and Restoration Plans March 24, 2016 St. George’s Episcopal Church

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* Meeting dates are subject to change.

There will be no Tunnel Forum meetings in November and December 2015.


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TWO‐

MONTH

CONSTRUCTION

UPDATE

AT CONSTRUCTION STAGING AREAS

Scott Hoffman and Thomas March, SKJD


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Channing StreetConstruction Staging Area

MiningShaft

ExcavationStockpile

Electrical/Mechanical

Site Office

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Channing StreetConstruction Staging Area

Launch Tunnel Boring Machine, July 2015

Hard Hat Tour, October 24, 2015 Mining in progress, ongoing – November 2015

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Lucy’s Progress (shown in purple)

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First Street Tunnel

Channing Street NW

F i r s t S t r e e t NW

Channing

Street CSA

McMillan

Reservoir


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Adams and Flagler IntersectionConstruction Staging Area

Building entrance

Construction traffic entrance and exit

CSA

CWZ

Road Closed ‒ No thru

traffic. Local access onlyat intersection of FirstStreet and Adams Street).

Abbreviations

CSA ‒ Construction Staging AreaCWZ ‒ Construction Work Zone

FEMS ‒ Fire and EMS Department

CSA

CWZ

FEMS Access Zone

4’-wide Pedestrian Sidewalk

Local Traffic

10

14 feet

55 feet

Fire department

ladder truck clearances

Legend

F l a g l e r P l

Adams St


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Adams and Flagler IntersectionConstruction Staging Area

Shaft excavation completed

Construction of sewer flume completed Adams shaft liner 50% complete, finish early

September

Construct near surface structures, started April2015 – ongoing

Adit excavation and lining, starting September

2015 Micro Tunnel Boring Machine setup and lining,

starting November 2015

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Adams and First IntersectionConstruction Work Zone

Concrete barrier

with 6-foot-highchain link fence

8-foot-high chain linkfence all around

Traffic sand drum

Adams Street NW

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N

Freeze pipes installed at the corner ofFirst and Adams where adit tunnelwill connect to First Street Tunnel.

Concrete barrier with6-foot-high chain link fence

Open North-Southsidewalk to pedestrians

F i r s t S t r e e t N W


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This page intentionally left blank.


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First and V IntersectionConstruction Staging Area

V Street

F i r s t

S t r e e t

Legend

CSA

CLC

CSA

CLC

4'-wide pedestrian walkway

FEMS access zone

Building entrance

Construction traffic entrance & exit

CSA ‒ Construction Staging Area

CLC ‒ Construction Lane ClosureFEMS ‒ Fire and EMS Department

Abbreviations

Sidewalk at

V Street has

been shiftedto allow FST

access to

storm drains

14 feet

55 feet

Fire department


Local Traffic

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Currentlyfenced

Securityfencingin place

Will notbefenced


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First and V IntersectionConstruction Staging Area

Completed shaft cast-in-place liner

Construction of sewer flume has started Verizon support work completed

Freeze system and formation completed, adit

mining started Construct near surface structures, started in

May 2015 – ongoing

Continued closure of First and V Streetsintersection

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Plan View of First and V StreetsConstruction Staging Area

Alley

Shaft

Adit

Chiller Unit for Freeze

Adit

A A

N

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V Street Profile View Adit Construction

Section B-B

B

B

TBM Tunnel

Connection to be made after

TBM tunnel complete

AlleyStreet Level

Ventilation Fan 75 HP

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Adit Excavation Cycle (Section A–A)

Freeze Pipes

Roadheader Small Loader

MuckBox

Re-establish Freeze Pipe

Shotcrete support as

soon as lattice girdersand mesh installed

Excavation Steps:

1. Excavation maximum 6 feet, remove freeze pipes

2. Erect lattice girder and wire mesh

3. Shotcrete

4. Re-establish freeze pipe in invert

Current

CycleNext

Cycle

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Equipment to be Used

Roadheaderbeing fabricated .

Roadheader finished product.

Shotcrete plant setup. Roadheader excavating V Street adit.

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Legend CSA

CLC

CSA FEMS accesszone

Building entrance

Construction traffic entrance and exit

CSA ‒ Construction Staging AreaCLC ‒ Construction Lane Closure

FEMS – Fire and EMS Department

Abbreviations

First and Thomas IntersectionConstruction Staging Area (Pumping Station)

14 feet

55 feet

Fire department


Local Traffic

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30-inch sewer line replaced

mid-September; restrictedto one lane with flaggers.


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First and Thomas IntersectionConstruction Staging Area (Pumping Station)

Construct shaft cast-in-placeliner, July 2015 – August 2015

Freeze system completed andadit formation in progress

Construct near surface

structures, started inMay 2015 – ongoing

Adit excavation and lining,

starting September 2015

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Excavation of the pumping station dropshaft is complete. Installation of the

cast-in-place liner is 60% complete.


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Production, Delivery, andPlacement of Concrete

SKJD makes every effort to schedule concrete pours

during regular work hours:

Monday thru Friday, 7 AM to 7 PM; on Saturdays, 9 AM to 5 PM

However, there have been times at all First Street Tunnel

construction sites when concrete pours must continue

beyond normal work hours:

Concrete plants are independent suppliers and there can be

problems at the plant, causing delays

Concrete trucks are independent suppliers traveling on publicroads; traffic congestion and detours can cause delays

Concrete placement requires all SKJD equipment to be

completely functioning and fully staffed

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Reported Incident on August 14at Adams Street CSA

The contractor experienced an equipment problem with the main cranelast Friday evening at the Adams and Flagler Construction Staging Area

The contractor then mobilized its secondary crane to access the shaft

The crew in the shaft were detained while the second crane was putinto position

The main crane began working and the work wrapped up

These types of activities can and do occur with complex construction

projects. They are not uncommon, and contingency plans and actionsare in place to address equipment issues, interruptions, and otherdisturbances.

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LONG‐

RANGE

CONSTRUCTION

SCHEDULE AND PROGRESS

Scott Hoffman, SKJD and John Kennedy, DC Water


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Long-Range Construction Schedule


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Division P – First Street Tunnel

Progress at-a-Glance as of July 31, 2015; 63% complete

TBM Mining and Lining

• Installed temporary ringsand launch frame

• Started mining throughshaft wall

• Installed Ring No. 8

V Street NCS-DC

• Continue excavating

• Installing bracingLevels 1 and 2

• Exposed sewer line

V Street Adit Tunnel

• Started Sequential

Excavation Method(SEM)

Pump Station – Drop Shaft

• Continue freeze

formation at drop shaftand adit

• Installed rebar, concreteforms and poured invertslab

• Installed rebar, concrete

forms and pouredconcrete for CIP LiftNo. 1

Adams Street – Drop Shaft

• Finished shaft excavation

• Installed rebar, concreteforms and poured invertslab

AS – Diversion Chamber

• Continue installing andwelding wales forbracing Levels 1 and 2

• Demo existing sewer

pipe and installed flumepipe

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UPDATE

ON

COMMUNITY MITIGATION MEASURES

John Kennedy, DC Water


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Responses to Residents’ Concerns

Employee parking outside of designated areas

Ticketed and towed vehicles when identified

Loud equipment backup alarms and air horns

Replaced some equipment/vehicle with static alarms and reduced air horn

usage with buzzer (OSHA requirement)

Queuing concrete and dump trucks at Construction Staging Areas

(CSAs)

Increased awareness to stage trucks at Channing Street CSA

Loud noise from First and V Streets CSA at night

Insulated cylinder pressure relief to avoid venting from temperature

changes

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Responses to Residents’ Concerns

Metropolitan Police Department officer stationary in patrol vehicle

Directed officer to periodically foot patrol around CSAs

Obstructed view around First and V Streets CSA due to sound

blankets

Removed some blankets on First Street at the north end of CSA Increased speeding in east alleyway

Installed collapsible fence, bollards, and additional signage to reduce traffic

Inadequate lighting at First and V Streets and Adams Street andFlagler Place Construction Staging Areas

Installed additional perimeter lighting around CSAs

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Saturday work efforts at each of the Construction Staging

Areas (CSAs) will continue

Saturday work hours are from 9 AM to 5 PM, and occur as

weather and the contractor’s schedule allows

The additional work day is necessary to make up for timelost during delays in the construction schedule (i.e., utility

relocations, inclement weather conditions, extensive water

main replacement at Adams Street and Flagler Place)

If you have questions, please call the First Street Tunnel

Hotline at 1-844-FST-INFO (1-844-378-4636)

Saturday Work

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Security and Safety withinConstruction Staging Areas

The Construction Staging Areas

(CSAs) house large trucks, construc-

tion equipment, and tools and havedeep, open excavations

The CSAs are closed to the public

Security personnel are onsite duringoff hours

SKJD has installed security lighting and cameras

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To better ensure your safety and the

safety of your children and pets, donot enter a Construction Staging Area.

Fencing signage at First and V Streets CSA.


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First and V Streets CSA published!

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The First Street Tunnel project

was shown in an advertisement

in the August 2015 geotechnical

magazine, Geostrata

First and V Streets Construction Staging Areashown in geotechnical periodical, Geostrata.


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DC Water and District Department ofTransportation Tree Planting Initiative

33Chinese PistacheCrepe Myrtle Magnolia

Community requested tree planting plan

DC Water is ready to provide funds to DDOT

DDOT will work with community members to coordinate plan and determineplanting locations

DC Water and SKJD will present landscaping and restoration plans in

October 2015 and will continue discussions through March 2016

35 native trees to be planted in Bloomingdale

P j t Di l B d t T


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Project Display Boards at TwoConstruction Staging Areas

There are currently 17 display boards that provide information

on the DC Clean Rivers Project and First Street Tunnel

On Tuesday, August 18, the DC Clean Rivers team installed

two sets of the display boards on the outer facing fences of

the Construction Staging Areas. One set each at:

First and V Streets Construction Staging Area

First and Thomas Streets Construction Staging Area

The following pages show where the display boards werepositioned along the fences at both Construction Staging

Areas

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Di l t Fi t d V St t


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Displays at First and V StreetsConstruction Staging Area (1 of 3)

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V StreetNW

First Street and V Street NWLooking South

First Street NW



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First Street and V Street NWLooking West

V StreetNW

First Street NW



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First Street and V Street NWLooking Northwest

V StreetNW

First Street NW

Displays at First and Thomas Streets


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Displays at First and Thomas StreetsConstruction Staging Area

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First Street and Thomas Street NWLooking West

Thomas Street NW

sidewalk

patio house

FEMS Doorway Mural Project at


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FEMS Doorway Mural Project atAdams and Flagler CSA

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The mural painting ofthe doors at Adams and

Flagler CSA is currentlyunderway

The first ten doors will becompleted in September

The remaining doors, 11thru 31, will be deliveredin October/November

Nessar paints a tribute to the environment (left) andDC Water’s Clean Rivers Project logo.


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Next Steps/Save the Date

Next Tunnel Forum Meeting on Thursday, October 22 at

7 PM, at St. George’s Episcopal Church

Save the date: First Street Tunnel hard hat tour day on

Saturday, October 24 at 10 AM. (Rain date is Saturday,

November 7). Logistic details to come.

Topics for next meeting: Landscaping and restoration of

disturbed areas

For updates, go to

www.dcwater.com/firststreettunnel or

call 1-844-FST-INFO (1-844-378-4636)for First Street Tunnel Construction Issues

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Documents

DC Water 1st Street Tunnel Construction Update 2015 08 20