Last week several doctoral students of the doctoral programme were busy in the HOAL in repairing and maintaining equipment in the research catchment. Casings of data and power supply cables were checked for damages, which e.g. sometimes can occur by animals and were repaired. Also weathered logger boxes and discharge measuring weirs were smoothed and repainted. It was a relatively little effort to extend the lifetime of all the installations, which are permanent exposed to the influences of weather and environment.