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| Chinese National Standard Category: Watershed planning and river regulating engineering |
| English Title: | Code for waterway survey |
| Chinese Title: | 水道观测规范 |
| Standard No.: | SL 257-2000 |
| Category No.: | P56 |
| Issued by: | Ministry of Water Resources |
| Issued on: | 2000-12-12 |
| Implemented on: | 2000-12-30 |
| Status: | superseded |
| Superseded by: | SL 257-2017 SL/T 257-2017 (Specifications for waterway survey) |
| Superseded on: | 2017-7-6 |
| Abolished on: | |
| Superseding: | |
| Word Count: | 35000 words |
| Similar Standards: |
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