Waltham Culvert Assessment

Background

The Town of Waltham was awarded a Community Action Grant in May 2025. Part of this project was a town-owned culvert assessment which was conducted by Acorn Engineering. The assessment found 15 Town-owned cross culvert and stream crossing assets located and assessed in April of 2026. Click here to view the full report by Acorn Engineering. 

The map viewer below was created to allow users to interact with and query the data collected by Acorn Engineering.

How to Use the Map Viewer

  • Click on the yellow culvert icons on the map to see photos and view the assessment.
  • Click the arrow at the bottom of the screen to open the assessment data table.
  • To filter the culverts by their characteristics, click the “Culvert Filter Tool” button.
  • See further detailed instructions below the map viewer. 
  • Click here to view the map viewer in a new window. 
Click a yellow culvert icon for photos & assessment information.
Click the culvert ID in the popup window to view the full culvert assessment.
Click the arrow at the bottom of the screen to open or close the culvert assessment spreadsheet.
To zoom to selected culverts click the button with 4 circles in the select window in the top left of the screen, then click the "Zoom to" button.
To clear the culvert selection click "Clear all" in the select window at the top left of the screen.
Photo by Acorn Engineering
To filter the culverts, click the "Culvert Filter Tool" in the top right of the screen.
To add a filter, click the "Add" button in the Culvert Filter Tool. To add one filter click "Clause"; to add multiple filters click "Clause set".
After adding a "Clause" 1) select the attribute you want to filter by 2) click the square button icon and 3) click "Unique" in the "Select source type" window.
Click the last drop-down box to select the value you want to filter by.
Click the "Apply" button to apply the filter.
The culverts that match the filter will be highlighted in blue. The number of culverts selected will appear in the select window at the top left of the screen. Applying the filter will also filter the table at the bottom of the screen.
To export a spreadsheet with the filtered culverts, 1) open the table, 2) click the "Actions" button at the top right of the table (icon with 4 circles), 3) click "Export" and 4) click "Export to CSV".
To remove filters on the data, open the "Culvert Filter Tool" and click the "X" above the filter to delete the clause.