Dam (Body and Spillway) Inspection

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Dam (Body and Spillway) Inspection

Keystone Co., Ltd. has accumulated years of experience and specialized techniques in dam body and spillway surveys and inspections. Using rope access techniques, technicians safely and quickly move across wide areas of dam bodies and spillways, conducting detailed inspections through close-up visual and contact observations. Additionally, by combining drone aerial photography, we can accurately inspect areas that would normally be difficult to check. This achieves excellent results in both time performance and cost performance.

Main Inspection Items

Inspection of damage to dam bodies and spillways (cracks, flaking, deterioration, etc.)

Core sampling (including long cores over 2 meters)

Photo documentation of abnormalities and creation of damage diagrams (CAD)

Verification of drainage and inflow systems

Data Organization, Analysis, and Reports

Examples of our deliverables.

Ready-to-use deliverables with
uncompromising quality standards

[Report Contents]
・Submission of inspection data (field notebooks and photographed images)
・Creation of damage diagrams (CAD)
・Preparation of investigation reports

* Inspections are conducted in accordance with various inspection guidelines.
* Damage assessment and countermeasure classification determination in accordance with each guideline.
* Inspection result organization is flexibly handled to meet your specific requirements.

Technical Manuals & Work Plans

These documents include detailed procedures and technical standards. Please download and review as needed.

Handbook Vol. 1

Handbook Vol. 2

Work Plan

Safety Management Checklist

Rope Access Safety Guidelines

Rope Access Procedure for Dam Structure Inspections

Public Relations & Direct Mail

On-Site Operations

Technical Documents

Frequently Asked Questions

Q. Isn’t this dangerous?

A. We comply fully with Japan’s Industrial Safety and Health Regulations. We are proud to have had zero accidents over 33 years.

Q. How much does it cost?

A. We adjust to your budget and always aim to deliver maximum value. Clients are consistently satisfied with the results we provide.

Q. Is traffic control required?

A. In principle, yes. However, we assess each situation and adapt as necessary.

Q. Can work be done in rainy weather?

A. Yes. Thanks to rope-based safety systems, operations can continue safely in light rain or wind.

Q. Do you use only one rope? What about lifelines?

A. We typically do not use a secondary lifeline. Instead, we follow rope access safety protocols approved under Japanese labor safety laws.

Q. Are your staff climbers?

A. No. This is a different field. All of our personnel are trained technical professionals, not recreational climbers.

Q. What’s the typical delivery time?

A. We flexibly adjust to meet your requested schedule.

Our Commitment to You

Providing the Best Plan Within Your Budget

At Keystone, we offer highly cost-effective inspection services powered by skilled and dedicated staff.
We always prioritize your budget and apply creative solutions to deliver results that exceed expectations.

We never reject projects due to tight budgets. In fact, we believe difficult conditions are where our creativity and technical strengths truly shine.

Please feel free to contact us for detailed estimates or consultations.
We also offer flexible formatting and presentation of inspection results based on your specific needs.

Dam (Body and Spillway) Inspection

Dam (Body and Spillway) Inspection

Main Inspection Items

Inspection of damage to dam bodies and spillways (cracks, flaking, deterioration, etc.)

Core sampling (including long cores over 2 meters)

Photo documentation of abnormalities and creation of damage diagrams (CAD)

Verification of drainage and inflow systems

Data Organization, Analysis, and Reports

Ready-to-use deliverables with
uncompromising quality standards