Initial construction of trench and metering manhole
![Initial construction of trench and metering manhole](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/Trench_contruction_web.jpg?itok=G7RooVOj)
Detailed Description
Initial construction of trench and metering manhole. Trench collects runoff from the respective pavement type and conveys the water to a metering manhole buried adjacent to the highway.
Sources/Usage
Public Domain.