Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • BLM CO Areas of Critical Environmental Concern

    Metadata Updated: March 3, 2026

    Once a polygon feature leaves the Pre-designated phase (transitions from Considered to Designated), that polygon will be removed from the ACEC Pre-designated feature class and be placed in the ACEC Designated feature class. This data set consist of digital data describing (ACEC) Areas of Critical and Environmental Concern for Public Lands in the State of Colorado. ACECs are designated by decisions made during BLM Resource Management Planning. Existing ACECs have a Resouce value tied to them. An example of these resources would be: Threatened and Endangered Plants. Other areas of concern have also been captured within this theme. When the users opens up the attribute table for this theme the user will notice ACEC follows most of names for each area. Some BLM field offices also included Research Natural Areas (RNAs) and Outstanding Natural Areas (ONAs) with in their layer. The data set was compiled from the most current data collected from the BLM Colorado Field Offices. In some cases data boundaries were snapped to BLMs Geographic Coordinate Data Base (GCDB). The GCDB is a statewide survey grid that BLM bases land boundaries on. Also in some cases within the ACECs outer boundary land holdings other than BLM have been cut out to show these Land Patterns, In other cases it has not. It is suggeted that the user of this data also download BLMs most current Surface Management Agency to compare and contrast land holdings within each ACEC.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: us-pd

    Downloads & Resources

    Dates

    Metadata Created Date November 21, 2025
    Metadata Updated Date March 3, 2026

    Metadata Source

    Harvested from DOI BLM DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 21, 2025
    Metadata Updated Date March 3, 2026
    Publisher Bureau of Land Management
    Maintainer
    Identifier https://blm-egis.maps.arcgis.com/home/item.html?id=9534c88e8bc84b42b1ac73dd00a2615d&sublayer=0
    Data First Published 2025-11-17T21:44:17Z
    Data Last Modified 2025-11-18T14:17:35Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:04
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/blm-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 91f83ca9-795a-4691-8b4e-cb7bcc2b9ca0
    Harvest Source Id ceb4b469-e13a-40f5-af40-5fe065f74ffa
    Harvest Source Title DOI BLM DCAT-US
    Homepage URL https://gbp-blm-egis.hub.arcgis.com/datasets/BLM-EGIS::blm-co-areas-of-critical-environmental-concern
    License http://www.usa.gov/publicdomain/label/1.0/
    Metadata Type geospatial
    Old Spatial -109.2563,40.9883,-104.4854,36.9298
    Program Code 010:000
    Source Datajson Identifier True
    Source Hash 3588d4201d6ee9b912293ce3357c816f61a297bd0633094e836ebebe9a6cb50f
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -109.2563, 40.9883, -109.2563, 36.9298, -104.4854, 36.9298, -104.4854, 40.9883, -109.2563, 40.9883}

    Didn't find what you're looking for? Suggest a dataset here.