These are arrows that indicate the direction of the flow of wastewater within the sanitary sewer pipes

City Survey - City of La Crosse Open Data Portal10

These arrows indicate the direction of flow in sanitary sewer gravity mains. Data are updated by city staff as needed, and automatically copied to the Open Data Portal. The "Last Updated" date shown

Vicmap Open Data2024-11-05 更新00

Flow Direction

The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system.

Oregon Open Data Portal2024-01-18 更新60

Sewer Flow Direction