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About sewer self-financing construction

Last update date September 20, 2022

1 What is Sewerage Self-Construction?

Sewerage self-financing construction is a sewerage work performed mainly on public roads, assuming that a person other than the public sewer manager will take over to Motoichi as a public sewerage facility after receiving approval from the public sewer manager. Says
。 For example, if you build three new houses on the site of one existing house, you will need three mounting pipes. In this case, if one mounting pipe uses an existing mounting pipe, the remaining two will be newly installed at its own expense.
In addition, if the position of the existing mounting pipe is changed due to the layout of the building (removal of the existing mounting pipe and installing a new mounting pipe), it will be self-financing work.

Basising Laws: Article 16 of the Sewerage Law

2 About the constructor

In the case of performing sewer self-financing construction on roads managed by the country or for construction of installing sewer mains on city roads, general competitive bidding qualified person of Yokohama City to judge the economic and technical ability of the constructor ( Person who has bid qualification for construction, construction type: civil engineering). (Only until September 30, 2017, you can also select from suppliers that have been licensed by the Construction Business Law.)
But, about mounting pipe construction (except construction on national highway), we can select constructor from drainage designation construction shop which the mayor of sewer regulations Article 38 appointed.

※About registration procedure to general competitive bidding qualified person list of Yokohama-shi, please see "qualification examination application" of Yokohama bid door (outside site) of Yokohama, bid.

3 Design standards for application documents, etc.

About design standards such as application books of sewer self-financing construction, please confirm the next.

・Yokohama City Sewerage Design Guidelines (separate page)
・Yokohama City Sewerage Design Standard Map (separate page)
・Yokohama City Civil Engineering Common Specifications (separate page)
・Yokohama City Sewer Pipe Construction Specifications (separate page)
・Public sewerage facility construction work handling summary PDF (PDF: 345KB)

4 Regarding application for approval

When performing sewer self-financing construction, you must submit an application for approval of public sewerage facility construction work to the Public Works Office of the relevant ward and obtain approval from the public sewer manager (The Mayor of Yokohama).
Please download the application form from the website. Please contact Public Works Office for details of the attached documents.

・Approval application for public sewerage facility construction work PDF (PDF: 109KB), Excel (Excel: 19KB)
・Road excavation site road surface restoration construction work fulfillment pledge PDF (PDF: 114KB), Word (word: 20KB)
・How to fill out the application form and list of attached documents PDF (PDF: 270KB)

When newly connecting the mounting pipe to the sewer main maintained on the private road, please attach the construction consent form of the landowner [attached book: certified copy (copy), official map (copy)]) to the approval application .

・Construction consent form PDF (PDF: 91KB), Word (word: 19KB)

5 About notification of start

When a person who has been issued a letter of approval must submit it to Public Works Office along with a schedule to registration form, starting construction of public sewerage facilities, etc.

・Construction of public sewerage facilities registration form PDF (PDF: 155KB), Excel (Excel: 17KB)
・How to fill out registration form PDF (PDF: 111KB)

6 Extension of construction period

If the construction period is to be extended for unavoidable reasons, it must be submitted to Public Works Office along with a schedule attached to the registration form extension of the construction period for public sewerage facilities.
The term "unavoidable reason" here is the following cases.
・When negotiations with local residents are difficult and construction is delayed
・When construction is delayed due to relocation, cutting, protection, etc. of underground buried objects, etc.
・When the construction method is changed due to an unexpected accident at the design stage, such as soft ground, spring water, etc., resulting in a change in construction method, etc., resulting in delay
・When construction is delayed due to natural disasters, land changes, etc.

・registration form PDF (PDF: 94KB), Excel (Excel: 17KB)
・How to fill out the extension of registration form PDF (PDF: 110KB)

7 Changes

If you are going to change the construction period for unavoidable reasons or change the facility contents at the time of application for approval, you must submit a change registration form to Public Works Office. Please consult with Public Works Office for attached documents.
In principle, the handling when changing the facility contents at the time of application for approval shall be as shown in the following table. However, please consult with Public Works Office in advance.

Procedure and Changes
Procedure Changes	Changes that require submission of registration form	Corrections to be corrected in books (Millions of yen)
Area of the catchment area	Change of area of 10% or more	Area change less than 10%
Main pipe type, diameter	Required	Not required
Extension of main pipe	Increase / decrease of 10m or more	Increase / decrease of less than 10m
Main pipe construction method	Required	Not required
Slope of main pipe	When the difference from the planned gradient is 20% or more	When the difference from the planned gradient is less than 20%
Planned bottom height of main pipe	When the difference from the bottom height of the original plan is 20 cm or more, or the soil is shallow.	When the difference from the bottom height of the original plan is less than 20 cm and the soil is deep.
Change of main pipe to connect mounting pipe	Required	Not required
Occupational position of pipe Human holes, rainwater masu	Not required	Required
Location and quantity of water collection, connection masu, pipe type of mounting pipe, extension	Not required	Required

※Any changes other than those shown in the table above will be determined in consultation with Public Works Office.

・registration form PDF (PDF: 97KB), Excel (Excel: 17KB)
・How to fill out the registration form PDF (PDF: 187KB)

8 Regarding withdrawal

If the work has been canceled due to the applicant's convenience, please submit the withdrawal notice to the relevant Public Works Office with the original copy of the approval letter attached.

Notice of withdrawalPDF（PDF：100KB）、Word (word: 24KB)

9 Completion Notification and Inspection

Within five days from the date of completion of the construction, the applicant must submit the registration form completed construction of public sewerage facilities to the Public Works Office in charge of jurisdiction and undergo a completion inspection.

Construction of public sewerage facilities completed registration formPDF（PDF：82KB）、Excel (Excel: 17KB)
Completed registration formPDF（PDF：201KB）

After passing the completion inspection, a certificate of completion inspection will be issued to the applicant, and the city will take over free of charge. With the grant, it will be handed over to Motoichi as a public sewerage facility and will be listed in the public sewer ledger figure.

10 Basis Regulations, etc.

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