No. 2023-1
Issued on March 31, 2024

Notice of Construction Works for New Waste Disposal Area
and of Accompanying Establishment of Prohibited Area
(From April 1, 2024 to March 31, 2025)●The construction work of the new waste disposal area will be continued as described below (See Fig.-1) in theseaward area adjacent to Umino-mori 3-chome, Koto-ku, Tokyo Prefecture (in Section 4, Tokyo-ku, Keihin Port).
●Mariners are requested to exercise due caution when sailing in the vicinity.

1 Outline of the works

Description

East Breakwater

Central BreakwaterReclaimed land (No. 1) outside

Tokyo International
Airport (Haneda Airport)(Placement of steel sheet piles and PMC (premixed clay) on the southwest and south sides)

Reference point

Direction

Distance

Latitude (north)Longitude (east)a

184°11'

2,821m

35°35'18.7"

139°49'56.8"

b

From Point ‘a'

56°25'

300m

35°35'24.0"

139°50'06.7"

c

From Point ‘b'

152°11'800m

35°35'01.0"

139°50'21.7"

326°25'850m

35°35'04.6"

S type guardboat（equipped with aVHF radio telephone）
N-typeguard vessel

G Block

C BlockChain

No.1③ B Water shielding and backﬁll works③ D Water shielding and backﬁll works

e300ｍ

aD Block

Yellow

Luminous 4.5 nauticalrange
miles
Paint color

Lantern

Yellow(24 hours a day)(in the daytime)

70ｍ(in the daytime) 330ｍ

Assignment of a guard boat to E Blockfrom September 2024 to February 2025

③ C Water shieldingand backﬁll works

d② Further
excavation worksc(24 hours a day)

330ｍ

E Block

Works area (prohibited area)

Area currently workedFig.-3 Markers for works

4 Identification flags for vessels engaged in the works
Vessels involved in the works display the identification flags as illustrated in Fig.-4.

(24 hours a day)Works area (prohibition of navigation)

Fig.-2 Works area chart

Yellow

Synchronous flashing system① Embankment construction
works in M Works Area

1,080ｍF Block★

LegendEmbankment

Synchronous flashing system

Opening③ E Water shielding 350ｍ
and backﬁll works

Light color

Yellow

Marker light buoy for indicating
works area
Marker light for indicatingembankments

Entrance/exit for mud and sand carriers(for sand and mud transfer)
Entrance/exit for workboats(engaged in excavating operations for further filling space)
Entrance/exit for workboats(for embankment construction work)
Entrance/exit for workboats(engaged in sealing and back-filling operations)▲Tenyu, No.2
a vesseldesigned to●transfer
mud andPrincipal
sandAnchor light (white)
Marker buoys (yellow flashing every 4 seconds; approx. luminous rangeof 4 km) to indicate the position of the tip of the anchor and that of thefloater pipe.
Length(143.4m)× Breadth(32.2m)× Depth(19.5m)
dimensions
Green•Workboats for the•Workboats, etc. to/from the new
construction of the New
waste disposal area
Waste Disposal Area
Workboats entering/ Workboats entering/ Mud and sand

Identification
flags•Mud-and-sand barges
entering/leaving special vessel
for mud-and-sand transfer•Mud-and-sand barges
bound for Chiba(White)Red lettersagainst a whitebackground(Signal board showing
the international code flag “A”)
(Common to all business places)

Fig.-4 Identification flags
For inquiries, contact

Employer

５０㎝
Blue flashing light

東京港埠頭（株）

Offshore Land Reclamation Section, Tokyo Port
Construction Office, Tokyo Metropolitan Government,
at 03-5500-2493

Yellow•Diving support boats

leaving through the leaving through the barges entering/
south side of D Block east side of D Block leaving F Block(Light blue) (Green-yellow)

50ｍ

800ｍ

Works area for dredged sand andmud temporary storage and transfer

Paint colorb③ A Water shielding
and backﬁll works

Light
Single flashing
character every 4 sec.

Luminous 2.2 nauticalrange
milesApprox. 1 m

380ｍ② Further
excavation works

Mud-and-sand transfer vessel
with pollution prevention framesMarker light for indicating embankments

Light
Single flashing
character every 4 sec.

Water surfaceN500ｍLight color
φ1,000mm

New waste disposal site
construction works area

No.4

Central Breakwater-Outside
Reclaimed Land (No.2)④ Mud andsand transfer

Marker light buoy for indicating works area

Approx. 3 mge

No.3

139°49'27.2"(1) Guard boatsIn‌ order to ensure safety, one guard boat will be assigned each to the east, west
and south sides of the works area (prohibited area) (day and night), to the west sideof the mud-and-sand-transfer operation (in the daytime) and to the west side of E
Block (where further excavation works are carried out) (in the daytime) and they
endeavor to offer information and guidance to vessels sailing nearby.(See Fig. 2 forlocation) The display of the guard boat is as shown in Fig. 5.
(2) MarkersIn‌ order to clearly indicate the works area and the embankments, marker lightbeacons have been established as illustrated in Fig.-2. The details of the marker
lights are as shown in Fig.-3.

MarkersforworkssaA
Block

139°49'45.9"

3 Safety measures

Topmark

F BlocktPasSection 4,Tokyo-ku,
Keihin Port

600 ｍ

From Point ‘d'E Block

No.6

B BlockFrom 15-gochi south
signal station

35°34'41.6"

prohibition of navigation

Fig.-1 Location chart

Central Breakwater-Outside
Reclaimed Land (No.1)

Point1,080m

C Block※The Tokyo West Passage No. 6 lightbuoy has been removed and replaced by a virtual AIS aid to navigation.

2. Prohibited area and period◎‌P eriod : April 1, 2024 to March 31, 2025◎‌A
 rea : Water area enclosed by lines joining, insequence, the following points ‘a’ to ‘e’ and theshore lines connecting ‘e’ and ‘a’.

236°25'No.1

D BlockyoWNo.5esKeihinjima

No.2

B Block

G BlockTokF Block ④Mud and sand transfer work

eage

No.8

E: Works for the business year 2024

From Point ‘c's
Pas

Ohi WharfNo. 1West Breakwater
Ohi Signal Station
Ohi Wharf No. 2③
B: Works for the business year 2013
Water
(Placement of PMC (premixed clay) on the west side)shielding and C: Works for the business year 2013
D Block embankment (Placement of steel sheet piles and PMC (premixed clay) on the south side)
D: Works for the business year 2024
filling(Placement of PMC (premixed clay) on the west side)
operations

No.4

outside Central Breakwater No.3
Reclaimed land (No. 2)

No.7

A: Works for the business year 201215-gochiSouth Signal StationastC

M works area

(Placement of steel sheet piles and PMC (premixed clay) on the east side)

dea

Brkoc
Bl

Apr. May Jun.

2024
Jul. Aug. Sep. Oct. Nov. Dec. Jan. Feb. Mar.

ltra
enr
atekw

A

Work scheduleYear and month

No.6
No.5

13-gochi No. 2(Aomi)

EyoTok(1) D and E BlocksWater‌
shielding, backfill works, embankment construction and further excavation ofthe sea ground to increase the capacity for waste disposal.
(2) F Block
Temporary‌storage and transfer to G Block and C Block (landfill operation), by theTenyu No. 2 (special barge designed to handle them), of dredged mud and sandcarried by mud and sand barges.
Blockname Type of work
D Block ①Embankment construction work
D Block②Further excavation work
E Block

15-gochi(Wakasu)

10-gochi Wharf(Ariake)

13-gochi No. 1

２００㎝

警戒船

Cut into slits

50 ㎝×50 ㎝

Fig.-5 Display of guard boatContractor

Public interest incorporated association Tokyo Navigation Safety & Information
Management Office, The Tokyo Wan Association for Marine Safety, at 03-6457-1505