---
title: "Explanation: Backfilling log"
slug: doc-verfuellprotokoll
legacy:
  type: glossary
  code: 49B8HX
links:
  related:
    - YSVSPX
  glossary: []
lang: en
source:
  origin_lang: de
  origin_file: 02_product/de/glossary/doc_verfuellprotokoll.md
  origin_hash:
    algorithm: sha256
    value: 11A2F48A4458B9B4D1305869F8CC921044B86A58408ED00153F38E1B58127E03
translation:
  target_lang: en
  generated_at: "2026-07-15T12:01:09.066091397Z"
---


# Explanation: Backfilling log

A **backfilling log** is a document used to record the materials and depth ranges used when backfilling a borehole. It serves to provide comprehensive documentation of the borehole lining once drilling operations have been completed.

Typically, a backfill log contains:

- Depth details defining the individual backfill sections
- Materials used, e.g. cuttings, filter gravel or clay
- Allocation of materials to depth ranges within the borehole
- Project and borehole information for unique identification
- Comments on any special circumstances during backfilling
- Details of the technician and their signature for confirmation

The backfilling log ensures that the structure of the backfill is documented in a traceable manner and forms an important basis for subsequent assessments and verification.