Native Seed Calculator

The CDOT HQ Landscape Architecture (LA) Section staff is available to answer questions regarding use and application of the CDOT Native Seed Calculator and/or developing native seed mixes for highway projects. 

Pamela Cornelisse, PLA [email protected]  303.757.9542
Greg Fischer, PLA, [email protected]  720.253.2936
Susan Suddjian, PLA, [email protected]  303.757.9481

The following  CDOT Native Seed Calculator Plant Species Selection Guide assists SWMP Administrators for Design with step-by-step instructions to develop native seed mixes for diverse ecological zones for highway projects in Colorado.  

The above Guide instructs users to create a hard drive folder in which to download and store the Guide and several files as follows:

CDOT Native Seed Calculator Plant Species Selection Guide (PDF for instruction / reference)

CDOT Highway Mile Marker Points  (kmz file for use within Google Earth)

CDOT Ecozones Mile Marker Points (kmz file for use within Google Earth)

NRCS Soil Web Data (kmz file for use within Google Earth)

EPA Waters Tool (kmz file for use within Google Earth)

CDOT Native Seed Calculator (Excel file - save in folder and copy for each project)

**Google Earth kmz files should be downloaded and stored in your folder. To install in Google Earth, drag and drop file into open Google Earth application, and check "on" box in Places panel.**  

The CDOT Highway Mile Marker Points kmz file provides an easy and quick reference for Mile Marker locations (graphically represented as push pins). The CDOT Ecozones Mile Markers kmz file provides physical, climatic, and biological data to each CDOT mile marker location in the State of Colorado. The data is then used to select plant species (grasses and forbs) and seeding rates in the CDOT Native Seed Calculator. The NRCS Soil Web Data kmz file provides a high level view of Colorado soil types (white polylines when viewed above 32,00 feet) and detailed information when zoomed in below 32,000 feet (yellow polylines, with links to project-level soil/plant information). The detailed information is then used to identify soil and local plant community types for projects.

Other sources for additional information for landscape characterization:

Colorado: The Official State Web Portal