This shapefile includes the boundaries for the Hester Marsh Restoration Site, Phases 1, 2, and 3.

Eelgrass in Elkhorn Slough was delineated using heads-up digitizing in ArcGIS v.10.5. UAV imagery flown in July 2021 was used as the base layer for digitizing the polygons. Google Earth imagery from 2021 was also used in areas where the UAV imagery did not exist. Additionally, multibeam bathymetric data collected in 2011 was used for drawing polygons in the central portion of the main channel just east of Hwy 1. The scale of interpretation was approximately 1/100. The dataset was not groundtruthed.

This landcover dataset represents habitats in the Elkhorn watershed based on 2018 high resolution NAIP imagery. The dataset was compiled, using automated classification techniques, by Nate Herold and his team at the NOAA Office of Coastal Management. This layer differs from the Elkhorn Slough advanced Lifeform map (available here) in terms of the classification scheme and the minimum mapping unit. This layer was created for the purpose of comparing habitat change from 2010 to 2018.

College Enrolled population by block group in the State of Iowa based on U.S. Census Bureau, 2013-2017 American Community Survey 5-Year Estimates. Used in the Transit Dependency Analysis as part of the 2020 Iowa DOT Public Transit Long Range Plan update. This factor was one of seven utilized in the analysis that was based on MTI Report 12-30 "Investigating the Determining Factors for Transit Travel Demand by Bus Mode in US Metropolitan Statistical Areas" by the Mineta Transportation Institute of San José State University (SJSU) in May 2015.More information on the Transit Dependency Analysis can be found in Appendix 2 of the Iowa Public Transit Long Range Plan.

(Non-White) Race population by block group in the State of Iowa based on U.S. Census Bureau, 2013-2017 American Community Survey 5-Year Estimates. Used in the Transit Dependency Analysis as part of the 2020 Iowa DOT Public Transit Long Range Plan update. This factor was one of seven utilized in the analysis that was based on MTI Report 12-30 "Investigating the Determining Factors for Transit Travel Demand by Bus Mode in US Metropolitan Statistical Areas" by the Mineta Transportation Institute of San José State University (SJSU) in May 2015.More information on the Transit Dependency Analysis can be found in Appendix 2 of the Iowa Public Transit Long Range Plan.

Sub-watersheds were grouped by catchment and drainage using a combination of LiDAR and stream delineation toolsets.

Average retail gas prices by county in the State of Iowa based on reported data to AAA and Gas Buddy from June 2019 through November 2019. Used in the Transit Ridership Dependency Analysis as part of the 2020 Iowa DOT Public Long Range Plan update. This factor was one of seven utilized in the analysis that was based on MTI Report 12-30 "Investigating the Determining Factors for Transit Travel Demand by Bus Mode in US Metropolitan Statistical Areas" by the Mineta Transportation Institute of San José State University (SJSU) in May 2015.More information on the Transit Dependency Analysis can be found in Appendix 2 of the Iowa Public Transit Long Range Plan.

Median Household Income by block group in the State of Iowa based on U.S. Census Bureau, 2013-2017 American Community Survey 5-Year Estimates. Used in the Transit Dependency Analysis as part of the 2020 Iowa DOT Public Transit Long Range Plan update. This factor was one of seven utilized in the analysis that was based on MTI Report 12-30 "Investigating the Determining Factors for Transit Travel Demand by Bus Mode in US Metropolitan Statistical Areas" by the Mineta Transportation Institute of San José State University (SJSU) in May 2015.More information on the Transit Dependency Analysis can be found in Appendix 2 of the Iowa Public Transit Long Range Plan.

(Non-English speaking) Language population by block group in the State of Iowa based on U.S. Census Bureau, 2013-2017 American Community Survey 5-Year Estimates. Used in the Transit Dependency Analysis as part of the 2020 Iowa DOT Public Transit Long Range Plan update. This factor was one of seven utilized in the analysis that was based on MTI Report 12-30 "Investigating the Determining Factors for Transit Travel Demand by Bus Mode in US Metropolitan Statistical Areas" by the Mineta Transportation Institute of San José State University (SJSU) in May 2015.More information on the Transit Dependency Analysis can be found in Appendix 2 of the Iowa Public Transit Long Range Plan.