Contract
No. HY/2013/01
Hong Kong-Zhuhai-Macao Bridge
Hong Kong Boundary Crossing Facilities –
Passenger Clearance Building
Monthly EM&A Report No. 28
(Covering the Period from 1 January 2017 to 31 January 2017)
9 February 2017
Revision 1
Main Contractor Environmental
Team
Contents
Executive Summary
1.4 Construction Works Undertaken During the Reporting
Period
2........ Air
Quality Monitoring
4........ Water Quality Monitoring
6........ Environmental Site Inspection and Audit
6.2 Advice on the Solid and Liquid Waste Management
Status
6.3 Environmental Licenses and Permits
6.4 Implementation Status of Environmental Mitigation
Measures
6.5 Summary of Exceedance of the Environmental Quality
Performance Limit
6.6 Summary of Complaints, Notification of Summons and
Successful Prosecution
7.1 Construction Programme for the Coming Months
7.2 Environmental Site Inspection Schedule for the
Coming Month
Figures
Figure 2.1 Location
of Air Quality Monitoring Stations
Figure 3.1 Location
of Noise Monitoring Stations
Figure 4.1 Location
of Water Monitoring Stations
Figure 5.1 Impact
Dolphins Monitoring Line Transect Layout Map
Appendices
Appendix A Location
of Works Areas
Appendix B Project
Organization for Environmental Works
Appendix C Construction
Programme
Appendix D Event
and Action Plan
Appendix E Waste
Flow Table
Appendix F Environmental
Licenses and Permits
Appendix G Implementation
Schedule for Environmental Mitigation Measures (EMIS)
Appendix H Statistics
on Environmental Complaints, Notification of Summons and Successful
Prosecutions
Appendix I Environmental
Site Inspection Schedule
Executive Summary
This
monthly Environmental Monitoring and Audit (EM&A) Report is prepared for
Contract HY/2013/01 Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing
Facilities (HKBCF) –
Passenger Clearance Building (hereafter referred to as “the Contract”) for the
Highways Department of Hong Kong Special Administrative Region (HKSAR). The
Contract was awarded to Leighton – Chun Wo Joint Venture (hereafter referred to
as “the Contractor”) and Atkins China Limited was appointed as the
Environmental Team (ET) by the Contractor.
The
Contract is part of Hong Kong – Zhuhai – Macao Bridge HKBCF which is a “Designated
Project”, under Schedule 2 of the Environmental Impact Assessment Ordinance
(EIAO) (Cap 499) and Environmental Impact Assessment (EIA) Report (Register No.
AEIAR-145/2009) was
prepared for the Project. The current Environmental Permit (EP) No. EP-353/2009/K
for HKBCF was
issued on 11 April 2016. These documents are available through the EIA
Ordinance Register. Site preparation works of the
Contract started on 26 September 2014 and the construction works of
the Contract
commenced on 6 October 2014.
Atkins
China Limited has been appointed by the Contractor to implement the
Environmental Monitoring & Audit (EM&A) programme for the Contract in
accordance with the Updated EM&A Manual for HKBCF
(Version 1.0) and will be providing environmental team services to the
Contract.
This
is the twenty-eighth monthly EM&A Report for the Contract which summarizes
findings of the EM&A works during the reporting period from 1 to 31 January
2017.
Environmental Monitoring and Audit Progress
The
monthly EM&A programme was undertaken in accordance with the Updated
EM&A Manual for HKBCF (Version 1.0). It should be noted that the air quality,
noise, water quality and dolphin monitoring works for the Contract are covered by Contract No. HY/2010/02 Hong Kong-Zhuhai-Macao
Bridge HKBCF – Reclamation Works and Contract No. HY/2011/03 Hong
Kong-Zhuhai-Macao Bridge Hong Kong Link Road – Section between Scenic Hill
and HKBCF. The ET of the Contract or
another ET of the HZMB project is required to conduct impact air quality
monitoring at AMS6 and AMS7 and noise monitoring at NMS2 and NMS3B as part of
EM&A programme if these monitoring stations are no longer covered under
Contract Nos. HY/2010/02 and HY/2011/03. However,
this is subject to ENPO’s final decision on which ET should carry out the monitoring
work at these stations.
The dates of site inspection during the reporting
period are
listed below:
Environmental
Site Inspection: 4, 11, 18 and 25
January 2017
Breaches of Action and Limit Levels
Summary
of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at
AMS6 shall be referred to the monthly EM&A report prepared by Contract No.
HY/2011/03.
There
was no Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level
recorded at AMS7 by the Environmental Team of Contract No. HY/2010/02 during
the reporting period.
There
was no Action and Limit Level exceedance for noise recorded at NMS2 and NMS3B
by the Environmental Team of Contract No. HY/2010/02 during the reporting period.
There
was no Action Level and Limit Level exceedance of Dissolved Oxygen (DO),
Turbidity and Suspended Solids (SS) recorded by the Environmental Team of
Contract No. HY/2010/02 during the reporting period.
Impact dolphin monitoring results at all transects are
reported in the EM&A Report prepared for Contract No. HY/2010/02.
Complaint Log
There were no complaints received in relation to the environmental
impact during the reporting period.
Notifications of
Summons and Successful Prosecutions
There was no
notifications of summons or prosecutions received during this reporting period.
Reporting
Change
There
was no reporting change during the reporting period.
Future Key Issues
The
future key issues to be undertaken in the upcoming month include:
Land
Based
·
Bulk Excavation (Box
Culvert, Seawater pump house)
·
Pile Cropping
·
Pile Capping
·
Waterproofing
·
Tower Crane Lowering
·
Suspended Slab
Construction
·
Backfilling
·
Formwork and
falsework stripping
·
Column and Wall
Construction (Seawater pump house, generator set building)
·
District Cooling
System Pipework installation
·
Blockwork walls
·
Pipework and ductwork
installation
·
Footings for roof
erection/ Footing demolition works
·
Hanger rods for cable
container
·
Wet trade works
·
Dry trade works
·
Launch Rail
Installation
·
Façade Bracket for
Cabins
·
Steel Roof Segment
Travelling works
·
MEP High Level
Containment
·
Steel Roof Erection
works
·
Trolley Removal Works
·
Barging Point
Loading/ Unloading works
·
Plinth construction
·
Removal of temporary
works
·
Window wall
·
Sothern Drop off Deck
construction
·
CLP 11KV installation
·
Heat exchanger
installation
·
District Cooling
System (DCS) chilled water pipe installation
·
Heavy MEP plant set
up in basement
·
Box Culvert RC works
Marine
Based
·
Bulk Excavation
(District cooling system (DCS) intake and outfall)
·
District cooling
system (DCS) intake RC works
·
Delivery of Steel
Roof Segment by Marine Transportation
·
Box Culvert Outfall
construction work
·
Construction of Passenger Clearance Building
(PCB) including architectural and builders works, structural steel roof and
reinforced concrete frames, basement, piled foundations, aluminium roof,
curtain wall facades, building services and electrical and mechanical works;
·
Installation of district cooling system including seawater cooling intake pumping
station, seawater intake and discharge water pipelines work; Installation of
Chilled water cooling pipelines system, heat exchanger and chilled pumping
system;
·
Construction of transport and associated
facilities connecting to the PCB entailing the Emergency Vehicular Access, an
at-grade mainland side drop-off area, an Hong Kong side elevated drop-off deck
and 8 numbers of footbridge links;
·
Construction of a public toilet, 6 numbers of
C&ED observation booths, a generator set building and a refuse storage
& material recovery chamber;
·
Construction of a section of 70m common
utilities enclosure and staff subway and civil provisions for associated
electrical and mechanical works;
·
Construction of drainage, sewerage, fresh water
& flushing water supply and utilities & service works;
·
Construction of civil provisions, including
draw pits & ducting for Traffic Control and Surveillance System (TCSS) and
Extra Low Voltage System (ELV);
·
Construction of box culvert A;
·
Construction of 2 numbers of vehicular bridge
abutments at mainland side pickup area earthmound;
·
Construction of geotechnical works including
top up the existing earth mound from +11.5mPD to the finished level as stated
in the Contract, reinforced earth slope and fill slopes and special backdrop
manhole at mainland side pickup area earthmound;
·
Landscape hardworks and softworks; and
·
Other works which are shown on the Drawings or
specified in the Specification or which may be ordered in accordance with the
Contract.
Table
1‑1 Contact
Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
Engineer
or Engineer’s Representative |
Chief
Resident Engineer |
Darrel
Kingan |
3958
7339 |
3468
2076 |
Environmental
Project Office / Independent Environmental Checker (Ramboll Environ Hong Kong
Limited) |
Environmental
Project Office Leader |
Y.
H. Hui |
3465
2888 |
3465
2899 |
Independent
Environmental Checker |
Raymond
Dai |
3465
2888 |
3465
2899 |
|
Contractor
|
Project
Manager |
Owen Leung |
9232
5750 |
3621
0180 |
Environmental
Officer |
Michael Lee |
9502 5887 |
3621
0180 |
|
Environmental
Team |
Environmental
Team Leader |
Keith
Chau |
2972 1721 |
2890
6343 |
24 hours
complaint hotline |
--- |
--- |
3958 7300 |
--- |
·
Bulk Excavation (Box Culvert, Seawater pump
house)
·
Tie Beams
·
Pile Cropping
·
Waterproofing
·
Tower Crane Dismantling
·
Suspended Slab Construction
·
Ground floor Base Slab Construction
·
Backfilling
·
Mega Column Construction
·
Formwork and falsework stripping
·
Column and Wall Construction
·
District Cooling System Pipework installation
·
Blockwork walls
·
Pipework and ductwork installation
·
Seawater Pump House Reinforced Concrete
·
Footings for roof erection/ Footing demolition
works
·
Hanger rods for cable container
·
Wet trade works
·
Dry trade works
·
Launch Rail Installation
·
Façade Bracket for Cabins
·
Steel Roof Segment Travelling works
·
MEP High Level Containment
·
Steel Roof Erection works
·
Trolley Removal Works
·
Barging Point Loading/ Unloading works
·
Plinth construction
·
Removal of temporary works
·
Window wall
·
Sothern Drop off Deck construction
·
CLP 11KV installation
·
Underground ductwork
·
Heat exchanger installation
·
District Cooling System (DCS) chilled water
pipe installation
·
Heavy MEP plant set up in basement
·
Bulk Excavation (District cooling system (DCS)
intake)
·
District cooling system (DCS) outfall
construction work
·
District cooling system (DCS) intake RC works
·
Box Culvert Outfall construction work
·
Delivery of Steel Roof Segment by Marine
Transportation
Table 2‑1 Construction Dust Monitoring Locations
ID |
Location Description |
AMS 6(1) |
Dragonair/CNAC
(Group) Building |
AMS 7(1), (2) |
Hong
Kong SkyCity Marriott Hotel |
Remark:
(1)
The ET of
this Contract should conduct impact air quality monitoring at the AMS listed in
the table as part of EM&A programme according to the latest notification from ENPO when the monitoring
station(s) is/are no longer covered by another ET of the HZMB project.
(2)
The original
monitoring location was at Hong Kong SkyCity Marriott Hotel (AMS7). As the permission to carry out air quality
monitoring at Hong Kong SkyCity Marriott Hotel was not granted after 31 January
2015, the monitoring location was relocated to Chu Kong Air-Sea Union
Transportation Co. Ltd. (AMS7A) from 5 February 2015 to 30 December 2015. The alternative monitoring location at Chu
Kong Air-Sea Union Transportation Co. Ltd. was approved by EPD on 5 February
2015. However, AMS7A was
relocated back to its original location (AMS7-Hong Kong SkyCity Marriott Hotel)
on 30 December 2015. The relocation of air
quality monitoring location, AMS7A, back to AMS7 was approved by EPD on 21
December 2015.
Table 2‑2 Action
and Limit Levels for 1-hour TSP
Monitoring
Station |
Action
Level, µg/m3 |
Limit
Level, µg/m3 |
AMS
6 – Dragonair / CNAC (Group) Building (HKIA) |
360 |
500 |
AMS
7 - Hong Kong SkyCity
Marriott Hotel |
370 |
Table 2‑3 Action
and Limit Levels for 24-hour TSP
Monitoring
Station |
Action
Level, µg/m3 |
Limit
Level, µg/m3 |
AMS
6 – Dragonair / CNAC (Group) Building (HKIA) |
173 |
260 |
AMS
7 - Hong Kong SkyCity Marriott Hotel |
183 |
Table 3‑1 Construction Noise Monitoring Locations
ID |
Location
Description |
NMS2(1) |
Seaview
Crescent |
NMS3B(1)(2) |
Site Boundary
of Site Office
Area at Works Area WA2 |
Remarks:
(1)
The ET of this
Contract should conduct impact noise monitoring at the NMS listed in the table
as part of EM&A programme according to the latest notification from ENPO when the monitoring
station(s) is/are no longer covered by another ET of the HZMB project.
(2)
The Action
and Limit Levels for schools will be applied for this alternative monitoring
location.
Table 3‑2 Action and Limit Level for Construction
Noise
Parameter |
Action Level |
Limit Level |
07:00 – 19:00 hours
on normal weekdays |
When one documented complaint is received |
75 dB(A)* |
Notes:
If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by
the
Noise Control Authority have to be followed.
* Limit level is 70 dB(A) for
schools and 65 dB(A) during school examination period.
Table 4-1 Impact Water Quality Monitoring Stations
Station |
Description |
East |
North |
IS5 |
Impact Station
(Close to HKBCF construction site) |
811579 |
817106 |
IS(Mf)6 |
Impact Station (Close
to HKBCF construction site) |
812101 |
817873 |
IS7 |
Impact Station
(Close to HKBCF construction site) |
812244 |
818777 |
IS8 |
Impact Station
(Close to HKBCF construction site) |
814251 |
818412 |
IS(Mf)9 |
Impact Station
(Close to HKBCF construction site) |
813273 |
818850 |
IS10 |
Impact Station
(Close to HKBCF construction site) |
812577 |
820670 |
Impact
Station (Close to HKBCF construction site) |
813562 |
820716 |
|
Impact Station
(Close to HKBCF construction site) |
814328 |
819497 |
|
IS17 |
Impact Station (Close
to HKBCF construction site) |
814539 |
820391 |
SR3 |
Sensitive receivers
(San Tau SSSI) |
810525 |
816456 |
SR4(N) |
Sensitive receivers
(Tai Ho) |
814705 |
817859 |
SR5 |
Sensitive receivers
(Artificial Reef in NE Airport) |
811489 |
820455 |
SR6 |
Sensitive receivers
(Sha Chau and Lung Kwu Chau Marine Park) |
805837 |
821818 |
SR7 |
Sensitive receivers (Tai Mo Do) |
814293 |
821431 |
SR10A[1] |
Sensitive receivers
(Ma Wan FCZ) 1 |
823741 |
823495 |
SR10B(N) [1] |
Sensitive receivers
(Ma Wan FCZ)2 |
823683 |
823187 |
CS(Mf)3 |
Control Station |
809989 |
821117 |
CS(Mf)5 |
Control Station |
817990 |
821129 |
CS4 |
Control Station |
810025 |
824004 |
CS6 |
Control Station |
817028 |
823992 |
CSA[2] |
Control
Station |
818103 |
823064 |
Table
4-2 Action and Limit Levels for Water Quality
Parameters |
Action |
Limit |
DO in mg L-1 (Surface, Middle & Bottom) |
Surface and Middle |
|
SS in mg L-1 (depth-averaged) at all
monitoring stations and control stations |
23.5 and 120% of upstream control station's SS at the same tide of the
same day* |
34.4 and 130% of upstream control station's SS at the same tide of the
same day and 10mg/L for WSD Seawater intakes* |
27.5 and 120% of upstream control station's turbidity at the same tide
of the same day* |
47.0 and 130% of upstream control
station's turbidity at the same tide of the same day* |
Table
5-1 Impact Dolphin
Monitoring Line Transect Co-ordinates (Provided by AFCD)
Transect ID |
HK Grid System |
Long Lat in WGS84 |
||
X |
Y |
Long |
Lat |
|
1# |
804671 |
815456 |
113.870287 |
22.277678 |
804671 |
831404 |
113.869975 |
22.421696 |
|
2# |
805475 |
815913 |
113.878079 |
22.281820 |
805477 |
826654 |
113.877896 |
22.378814 |
|
3 |
806464 |
819435 |
113.887615 |
22.313643 |
806464 |
822911 |
113.887550 |
22.345030 |
|
4 |
807518 |
819771 |
113.897833 |
22.316697 |
807518 |
829230 |
113.897663 |
22.402113 |
|
5 |
808504 |
820220 |
113.907397 |
22.320761 |
808504 |
828602 |
113.907252 |
22.396462 |
|
6 |
809490 |
820466 |
113.916965 |
22.323003 |
809490 |
825352 |
113.916884 |
22.367128 |
|
7# |
810499 |
820880 |
113.926749 |
22.326757 |
810499 |
824613 |
113.926688 |
22.360464 |
|
8# |
811508 |
821123 |
113.936539 |
22.328966 |
811508 |
824254 |
113.936486 |
22.357241 |
|
9# |
812516 |
821303 |
113.946320 |
22.330606 |
812516 |
824254 |
113.946279 |
22.357255 |
|
10* |
813525 |
820827 |
113.956112 |
22.326321 |
813525 |
824657 |
113.956066 |
22.360908 |
|
11# |
814556 |
818853 |
113.966155 |
22.304858 |
814556 |
820992 |
113.966125 |
22.327820 |
|
12 |
815542 |
818807 |
113.975726 |
22.308109 |
815542 |
824882 |
113.975647 |
22.362962 |
|
13 |
816506 |
819480 |
113.985072 |
22.314192 |
816506 |
824859 |
113.985005 |
22.362771 |
|
14 |
817537 |
820220 |
113.995070 |
22.320883 |
817537 |
824613 |
113.995018 |
22.360556 |
|
15 |
818568 |
820735 |
114.005071 |
22.325550 |
818568 |
824433 |
114.005030 |
22.358947 |
|
16 |
819532 |
821420 |
114.014420 |
22.331747 |
819532 |
824209 |
114.014390 |
22.356933 |
|
17 |
820451 |
822125 |
114.023333 |
22.338117 |
820451 |
823671 |
114.023317 |
22.352084 |
|
18 |
821504 |
822371 |
114.033556 |
22.340353 |
821504 |
823761 |
114.033544 |
22.352903 |
|
19 |
822513 |
823268 |
114.043340 |
22.348458 |
822513 |
824321 |
114.043331 |
22.357971 |
|
20 |
823477 |
823402 |
114.052695 |
22.349680 |
823477 |
824613 |
114.052686 |
22.360610 |
|
21 |
805476 |
827081 |
113.877878 |
22.382668 |
805476 |
830562 |
113.877811 |
22.414103 |
|
22 |
806464 |
824033 |
113.887520 |
22.355164 |
806464 |
829598 |
113.887416 |
22.405423 |
|
23 |
814559 |
821739 |
113.966142 |
22.334574 |
814559 |
824768 |
113.966101 |
22.361920 |
|
Remark: (a)
* Due
to the presence of deployed silt curtain systems at the site boundaries of
the Contract, some of the transect
lines shown in Figure 5.1 could not be fully surveyed during the regular
survey. Transect 10 is reduced from 6.4km to approximately 3.6km in length
due to the HKBCF construction site. Therefore the total transect length for
both NEL and NWL combined is reduced to approximately 108km (b)
#
Coordinates for transect lines 1, 2,
7, 8, 9 and 11 have been updated in respect to the Proposal for Alteration of
Transect Line for Dolphin Monitoring approved by EPD on 19 August 2015. |
Table 5-2 Action and Limit Levels for
Chinese White Dolphin Monitoring - Approach to Define Action Level
(AL) and Limit Level (LL):
|
North Lantau Social Cluster |
|
|
NEL |
NWL |
Action Level |
(STG < 70% of baseline)
& (ANI < 70% of baseline) |
(STG < 70% of baseline)
& (ANI < 70% of baseline) |
Limit Level |
[(STG < 40% of
baseline) & (ANI < 40% of baseline)] AND [ (STG < 40% of
baseline) & (ANI < 40% of baseline)] |
Table 5-3 Derived Value of Action
Level (AL) and Limit Level (LL) for Chinese White Dolphin Monitoring
|
North Lantau Social Cluster |
|
|
NEL |
NWL |
Action Level |
(STG < 4.2) & (ANI < 15.5) |
(STG < 6.9) & (ANI < 31.3) |
Limit Level |
[(STG < 2.4) & (ANI <8.9)]
AND[ (STG < 3.9) & (ANI < 17.9)] |
Table 6-1 Summary of Environmental Site
Inspections
Date of Audit |
Observations |
Actions Taken by Contractor / Recommendation |
Date of Observations Closed |
28 December 2016 |
No drip tray was provided for a chemical container near rebar bending
yard. |
The Contractor was reminded to provide a drip tray for the chemical
container near rebar bending yard. |
4 January 2017 |
4 January 2017 |
1. Stagnant water was found inside the basement area of PCB. 2. Cement bags were not covered inside the basement area of PCB. 3.
General refuses were found with sorting near the western side of PCB
building. 4. A chemical container was found without drip tray. |
1. The Contractor was reminded to clear the stagnant water inside the
basement area of PCB. 2. The Contractor was reminded to provide the cover for the cement bags
inside the basement area of PCB. 3. The Contractor was reminded to sort the general refuses from the
construction waste near the western side of PCB building. 4. The Contractor was reminded to provide the drip tray for the
chemical container. |
11 January 2017 |
11 January 2017 |
No particular environmental issue was recorded during the site
inspection. |
Nil. |
Nil. |
18 January 2017 |
1. The chemical leakage was found from the chemical container near the
northern footbridge area. 2. The general refuses was found floating on the stagnant water in the
works area at the northeast of PCB building. |
1. The Contractor was
reminded to provide the drip tray for chemical container and the contaminated
soil should be treated as chemical waste. 2. The Contractor was
reminded to remove the general refuses as soon as possible and keep the site
tidiness. |
25 January 2017 |
25 January 2017 |
No particular environmental issue was recorded during the site
inspection. |
Nil. |
Nil. |
Table 7-1 Construction Activities for February 2017
Site Area |
Description
of Activities |
Nature of
Activities |
WA1 |
Bulk
Excavation (Box Culvert, Seawater pump house) |
Land-Based |
WA1 |
Pile
Cropping |
Land-Based |
WA1 |
Pile
Capping |
Land-Based |
WA1 |
Waterproofing
|
Land-Based |
WA1 |
Tower
Crane Lowering |
Land-Based |
WA1 |
Suspended
Slab Construction |
Land-Based |
WA1 |
Backfilling
|
Land-Based |
WA1 |
Formwork
and falsework stripping |
Land-Based |
WA1 |
Column
and Wall Construction (Seawater pump house, generator set building) |
Land-Based |
WA1 |
District
Cooling System Pipework installation |
Land-Based |
WA1 |
Blockwork
walls |
Land-Based |
WA1 |
Pipework
and ductwork installation |
Land-Based |
WA1 |
Footings
for roof erection/ Footing demolition works |
Land-Based |
WA1 |
Hanger
rods for cable container |
Land-Based |
WA1 |
Wet
trade works |
Land-Based |
WA1 |
Dry
trade works |
Land-Based |
WA1 |
Launch
Rail Installation |
Land-Based |
WA1 |
Façade
Bracket for Cabins |
Land-Based |
WA1 |
Steel
Roof Segment Travelling works |
Land-Based |
WA1 |
MEP
High Level Containment |
Land-Based |
WA1 |
Steel
Roof Erection works |
Land-Based |
WA1 |
Trolley
Removal Works |
Land-Based |
WA1 |
Barging
Point Loading/ Unloading works |
Land-Based |
WA1 |
Plinth
construction |
Land-Based |
WA1 |
Removal
of temporary works |
Land-Based |
WA1 |
Window
wall |
Land-Based |
WA1 |
Sothern
Drop off Deck construction |
Land-Based |
WA1 |
CLP 11KV
installation |
Land-Based |
WA1 |
Heat
exchanger installation |
Land-Based |
WA1 |
District
Cooling System (DCS) chilled water pipe installation |
Land-Based |
WA1 |
Heavy MEP
plant set up in basement |
Land-Based |
WA1 |
Box
Culvert RC works |
Land-Based |
WA1 |
Bulk
Excavation (District cooling system (DCS) intake and outfall) |
Marine-Based |
WA1 |
District
cooling system (DCS) intake RC works |
Marine-Based |
WA1 |
Delivery of
Steel Roof Segment by Marine Transportation |
Marine-Based |
WA1 |
Box
Culvert Outfall construction work |
Marine-Based |