CIRCULAR

ISSUING ECONOMIC – TECHNICAL NORMS FOR DREDGING OF MARINE WORKS

Pursuant to the Maritime Code of Vietnam dated November 25, 2015;

Pursuant to the Government's Decree No. 12/2017/ND-CP dated February 10, 2017 defining the functions, tasks, powers and organizational structure of the Ministry of Transport;

Pursuant to the Government’s Decree No. 32/2015/ND-CP dated March 25, 2015 on management of investment and construction costs.

Upon the request of the Director of the Department of Transport Infrastructure and the Director of the Vietnam Maritime Administration,

The Minister of Transport hereby issues the Circular issuing economic – technical norms for dredging of marine works.

Article 1. The economic – technical norms for dredging of marine works shall be annexed to this Circular.

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Article 3. The Chief of the Ministry’s Office, the Ministry’s Chief Inspector, department Directors, Director of the Vietnam Maritime Administration, Heads of entities, organizations and individuals concerned, shall be responsible for implementing this Circular./.

PP. MINISTER
DEPUTY MINISTER




Nguyen Van Cong

ECONOMIC – TECHNICAL NORMS

FOR DREDGING OF MARINE WORKS  
(Issued together with the Circular No. 44/2018/TT-BGTVT dated August 3, 2018 of the Minister of Transport)

Chapter I

GENERAL PROVISIONS

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Economic – technical norms for dredging of marine works are applied to domestic and foreign entities, organizations and individuals related to the dredging and overhaul of shipping channels, internal waters and territorial waters within the seaport’s water area.

I.2. Bases for setting up these norms:

+ The Government’s Decree No. 32/2015/ND-CP dated March 25, 2015 on management of investment and construction costs;

+ The Circular No. 06/2016/TT-BXD dated March 10, 2016 of the Ministry of Construction regarding instructions for determination and management of investment and construction costs;

+ The Circular No. 47/2015/TT-BGTVT dated September 14, 2015 of the Minister of Transport prescribing the scope and responsibilities of seafarers, operators and minimum safety requirements concerning personnel aboard the inland watercraft;

+ The Circular No. 04/2017/TT-BGTVT dated January 20, 2017 of the Minister of Transport on amendments and supplements to certain articles of the Circular No. 47/2015/TT-BGTVT dated September 14, 2015 of the Minister of Transport regarding the scope and responsibilities of seafarers, operators and minimum safety requirements concerning personnel aboard the inland watercraft;

+ Reporting and measurement data used for setting up economic – technical norms for dredging of marine works.

+ Certain legislative documents and other documents concerned.

I.3. Contents of these norms:

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- Labor consumption rate:

This refers to the number of working days of direct construction workers and workers providing construction support services.

The number of working days includes those days during which both main workers and marginal workers spend on carrying out and completing a construction workload unit from the preparation stage to the stage of completion and clean-up of the construction site.  

Worker rank refers to the average ranks of workers involved in carrying out a construction workload unit.

- Construction machinery or equipment operation rate:

This refers to the number of shifts during which both main construction machinery or equipment and auxiliary ones are directly operated to complete a construction workload unit.  

I.4. Layout of these norms:

Economic – technical norms for dredging of marine works are arranged into groups, types of work, are numbered and organized into 02 chapters:

Chapter I: General provisions

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- Submarine grab dredge;

- Transportation of dredged materials by self-propelled barges;

Each norm comprises a summary of work components, technical conditions and construction conditions, and is measured in an appropriate unit for dredging and transportation activities.

- Components which are consumed within a specified norm shall be defined according to the following principles:

+ Main and marginal labor consumption rate shall be determined by the number of working days specific to the average ranks of direct construction workers;    

+ The construction equipment and machinery operation rate shall be determined by the number of shifts on which construction equipment or machinery is operated (construction equipment or machinery which are those incurring a large proportion of costs to total equipment or machinery cost per a workload unit, a work item or a construction structure. For the purposes of this Circular, construction equipment or machinery include construction barges, grab dredge, self-propelled barges with open decks, etc.);

+ The operation rate of other construction equipment and machinery shall be determined by the ratio (in percent) of operation of these equipment and machinery to total cost of operation of main equipment or machinery (these construction equipment or machinery which are those incurring a small proportion of costs to total equipment or machinery cost per a workload unit, a work item or a construction structure. For the purposes of this Circular, these construction equipment or machinery include towboats, motor boats used for installing buoys, construction site positioning equipment, etc.).

I.5. Instructions for application of norms:

- Economic – technical norms for dredging of marine works are bases for unit construction cost formulation, construction cost estimation and investment and construction cost management.

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Chapter II

ECONOMIC – TECHNICAL NORMS FOR DREDGING OF MARINE WORKS

II.1. Processes:

1. Dredging by using submarine grab dredge:

- Preparation of tools, equipment and signal buoys;

- Positioning of the construction center point and determination of excavation scope;

- Movement of construction equipment and machinery within the construction site;

- Maintenance of water transport safety within the construction site;

- Grab dredging and loading of dredged materials aboard the barge (transporting dredged materials for disposal is not included in these norms)

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- The barge carries dredged mud and soil to the dumping site in accordance with regulations in force;

- The barge drains dredged mud and soil;

- The barge turns around to the position of the dredging ship.

II.2. Application conditions:

Classification of dredged mud and soil, and guidelines for application of these norms under particular construction conditions, shall follow instructions given in equivalent norms for dredging of marine works which are available in the system of norms for construction cost estimates, issued by the Ministry of Construction. 

II.3. Norms

II.3.1. Dredging. 10000 – Submarine grab dredging

Work components:

- Preparation, installation of signal buoys and determination of dredging scope;

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- Maintenance of water transport safety within the construction site;

- Grab dredging and loading of dredged materials aboard the open deck self-propelled barge (transporting dredged materials for disposal is not included in these norms).

Unit: 100 m³

Code

Work description

Items used

Unit

Sediment type

Thick sludge, gravel sediments accumulated for up to 3 years, peat sediments

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Sandy loam soil, clayish soil mixed with gravels, clamshells, sticky clay 

Semi-stiff clay, stiff clay

NV.1001

Submarine dredging by using grab dredge having the capacity ≤ 5m³ and operating at the depth ≤ 6m

Workforce

...

...

...

4/7-ranked workers

Labour

1.5

1.5

1.5

1.5

Construction equipment and machinery

...

...

...

Grab dredge with the capacity ≤ 5m³

shift

0.090

0.102

0.115

0.172

400T barge

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...

...

0.090

0.102

0.115

0.172

Open deck self-propelled barge with the loading capacity of ≤ 400T

shift

0.090

0.102

0.115

...

...

...

23CV motor boat

shift

0.045

0.051

0.057

0.086

Others

%

2.0

...

...

...

2.0

2.0

NV.1002

Submarine dredging by using grab dredge having the capacity ≤ 8m³ and operating at the depth ≤ 6m

Workforce

...

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...

4/7-ranked workers

Labour

1.5

1.5

1.5

1.5

Construction equipment and machinery

...

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...

Grab dredge with the capacity ≤ 8m³

shift

0.050

0.057

0.063

0.095

800T barge

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...

0.050

0.057

0.063

0.095

Open deck self-propelled barge with the loading capacity of ≤ 800T

shift

0.050

0.057

0.063

...

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...

23CV motor boat

shift

0.025

0.028

0.032

0.048

Others

%

2.0

...

...

...

2.0

2.0

1

2

3

4

NV.1003

Submarine dredging by using grab dredge having the capacity ≤ 12m³ and operating at the depth ≤ 6m

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4/7-ranked workers

Labour

1.5

1.5

...

...

...

1.5

Construction equipment and machinery

Grab dredge with the capacity ≤ 12 m³

shift

...

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...

0.035

0.039

0.059

1000T barge

shift

0.031

0.035

0.039

0.059

...

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...

shift

0.031

0.035

0.039

0.059

23CV motor boat

shift

0.015

0.018

...

...

...

0.030

Others

%

2.0

2.0

2.0

2.0

NV.1004

Submarine dredging by using grab dredge having the capacity > 12m³ and operating at the depth ≤ 6m

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4/7-ranked workers

Labour

1.5

1.5

...

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...

1.5

Construction equipment and machinery

Grab dredge with the capacity > 12 m³

shift

...

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...

0.024

0.027

0.041

1200T barge

shift

0.021

0.024

0.027

0.041

...

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...

shift

0.021

0.024

0.027

0.041

23CV motor boat

shift

0.011

0.012

...

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...

0.021

Others

%

2.0

2.0

2.0

2.0

1

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...

3

4

NV.1005

Submarine dredging by using grab dredge having the capacity ≤ 5m³ and operating at the depth > 6÷9m

Workforce

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4/7-ranked workers

Labour

1.5

1.5

1.5

1.5

Construction equipment and machinery

...

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...

Grab dredge with the capacity ≤ 5m³

shift

0.107

0.123

0.139

0.209

400T barge

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...

0.107

0.123

0.139

0.209

Open deck self-propelled barge with the loading capacity of ≤ 400T

shift

0.107

0.123

0.139

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...

23CV motor boat

shift

0.053

0.061

0.070

0.105

Others

%

2.0

...

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...

2.0

2.0

NV.1006

Submarine dredging by using grab dredge having the capacity ≤ 8m³ and operating at the depth > 6÷9m

Workforce

...

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...

4/7-ranked workers

Labour

1.5

1.5

1.5

1.5

Construction equipment and machinery

...

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...

Grab dredge with the capacity ≤ 8m³

shift

0.059

0.068

0.077

0.115

800T barge

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...

0.059

0.068

0.077

0.115

Open deck self-propelled barge with the loading capacity of ≤ 800T

shift

0.059

0.068

0.077

...

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...

23CV motor boat

shift

0.029

0.034

0.038

0.058

Others

%

2.0

...

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...

2.0

2.0

1

2

3

4

NV.1007

Submarine dredging by using grab dredge having the capacity ≤ 12 m³ and operating at the depth > 6÷9m

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4/7-ranked workers

Labour

1.5

1.5

...

...

...

1.5

Construction equipment and machinery

Grab dredge with the capacity ≤ 12 m³

shift

...

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...

0.042

0.048

0.072

1000T barge

shift

0.037

0.042

0.048

0.072

...

...

...

shift

0.037

0.042

0.048

0.072

23CV motor boat

shift

0.018

0.021

...

...

...

0.036

Others

%

2.0

2.0

2.0

2.0

NV.1008

Submarine dredging by using grab dredge having the capacity > 12m³ and operating at the depth > 6÷9m

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...

4/7-ranked workers

Labour

1.5

1.5

...

...

...

1.5

Construction equipment and machinery

Grab dredge with the capacity > 12 m³

shift

...

...

...

0.029

0.033

0.050

1200T barge

shift

0.025

0.029

0.033

0.050

...

...

...

shift

0.025

0.029

0.033

0.050

23CV motor boat

shift

0.013

0.015

...

...

...

0.025

Others

%

2.0

2.0

2.0

2.0

1

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...

3

4

NV.1009

Submarine dredging by using grab dredge having the capacity ≤ 5m³ and operating at the depth > 9m

Workforce

...

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...

4/7-ranked workers

Labour

1.5

1.5

1.5

1.5

Construction equipment and machinery

...

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...

Grab dredge with the capacity ≤ 5m³

shift

0.117

0.135

0.153

0.230

400T barge

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...

...

0.117

0.135

0.153

0.230

Open deck self-propelled barge with the loading capacity of ≤ 400T

shift

0.117

0.135

0.153

...

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...

23CV motor boat

shift

0.059

0.068

0.077

0.115

Others

%

2.0

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...

2.0

2.0

NV.1010

Submarine dredging by using grab dredge having the capacity ≤ 8m³ and operating at the depth > 9m

Workforce

...

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...

4/7-ranked workers

Labour

1.5

1.5

1.5

1.5

Construction equipment and machinery

...

...

...

Grab dredge with the capacity ≤ 8m³

shift

0.065

0.075

0.085

0.126

800T barge

...

...

...

0.065

0.075

0.085

0.126

Open deck self-propelled barge with the loading capacity of ≤ 800T

shift

0.065

0.075

0.085

...

...

...

23CV motor boat

shift

0.032

0.037

0.042

0.063

Others

%

2.0

...

...

...

2.0

2.0

1

2

3

4

NV.1011

Submarine dredging by using grab dredge having the capacity ≤ 12m³ and operating at the depth > 9m

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4/7-ranked workers

Labour

1.5

1.5

...

...

...

1.5

Construction equipment and machinery

Grab dredge with the capacity ≤ 12 m³

shift

...

...

...

0.046

0.053

0.079

1000T barge

shift

0.040

0.046

0.053

0.079

...

...

...

shift

0.040

0.046

0.053

0.079

23CV motor boat

shift

0.020

0.023

...

...

...

0.039

Others

%

2.0

2.0

2.0

2.0

NV.1012

Submarine dredging by using grab dredge having the capacity > 12m³ and operating at the depth > 9m

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...

4/7-ranked workers

Labour

1.5

1.5

...

...

...

1.5

Construction equipment and machinery

Grab dredge with the capacity > 12 m³

shift

...

...

...

0.032

0.036

0.055

1200T barge

shift

0.028

0.032

0.036

0.055

...

...

...

shift

0.028

0.032

0.036

0.055

23CV motor boat

shift

0.014

0.016

...

...

...

0.028

Others

%

2.0

2.0

2.0

2.0

1

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...

3

4

II.3.2 Transportation and disposal of dredged materials by using self-propelled barges

Work components: .....

Preparation, transportation of dredged soil and sand by using open deck self-propelled barges to the dumping site.

Unit: 100 m³

Code

Description

Items used

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In the first one kilometer

In the next one kilometer

Distance < 6km

Distance of 6÷20km

Distance > 20km

VC.101

Transportation of dredged soil and sand by using the open deck self-propelled barge having the loading capacity of ≤ 400T

Construction equipment and machinery

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Open deck self-propelled barge with the loading capacity of ≤ 400T

shift

0.084

0.071

0.065

0.062

...

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...

Transportation of dredged soil and sand by using the open deck self-propelled barge having the capacity of ≤ 800T

Construction equipment and machinery

Open deck self-propelled barge with the loading capacity of ≤ 800T

shift

...

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...

0.042

0.038

0.036

VC.103

Transportation of dredged soil and sand by using the open deck self-propelled barge having the capacity of ≤ 1200T

Construction equipment and machinery

...

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...

Open deck self-propelled barge with the loading capacity of ≤ 1200T

shift

0.018

0.015

0.014

0.013

VC.104

Transportation of dredged soil and sand by using the open deck self-propelled barge having the capacity of > 1200T

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Open deck self-propelled barge with the loading capacity of >1200T

shift

0.008

0.007

...

...

...

0.005

11

21

22

23