Public comment notices are posted to this page whenever public input is sought for a project or plan that will be reviewed by the Commission or is related to NCPC’s work. This gives the public an opportunity to provide insight, suggestions, or recommendations about the project or plan. Check back often to see a list of the latest public comment opportunities. Methods for submitting comments for each listed plan or project vary, so please be sure to use the proper submission method.

Upcoming Commission Meeting

May 2, 2024
Open Session

 National Capital Planning Commission
 401 9th Street, NW, Suite 500, Washington, DC 20004

NCPC Public Comment Opportunities

These opportunities are in response to projects, plans, or initiatives where NCPC has a lead or shared responsibility.

Hirshhorn Museum Building and Plaza Revitalization

Environmental Assessment

Project: #8543
Closing Date: May 31, 2024
Agency Seeking Comment/Posting Notice: Smithsonian Institution

Scoping Meeting

May 21, 2024    09:00 AM

 Online Meeting
 401 9th Street, NW

Scoping Meeting

May 22, 2024    02:00 PM

 Online Meeting
 401 9th Street, NW

Site Tour

May 29, 2024    09:00 AM

 Hirshhorn Museum
 Independence Avenue, SW and 7th Street, SW
Input Requested:
Public comments concerning the scope of issues to address in the Environmental Assessment (EA). Comments received during the scoping period will be used to refine alternatives and inform the EA analysis. All comments must be received no later than May 31, 2024. Click the button below to submit comments:



Submit comments to:
Digital submissions are preferred, please click the button above.

Description of Project:
The Smithsonian Institution (SI) and the National Capital Planning Commission (NCPC) announce the opportunity to provide public comment as part of the initiation of the National Environmental Policy Act (NEPA) process for the Hirshhorn Museum and Sculpture Garden Building and Plaza Revitalization project on the National Mall in Washington D.C.

This project is the third of three sequential campus revitalization projects that includes the Building Envelope Repair project (completed 2023) and the Sculpture Garden Revitalization project (under construction). The revitalization of the building and plaza will address critical infrastructure and programmatic deficiencies including entry and circulation accessibility and wayfinding, perimeter security and visitor screening, below grade expansion to support public and back of house spaces, and replacement of building systems that have reached the end of their useful life.

The proposed project is subject to the review of NCPC under the National Capital Planning Act. NCPC will serve as the lead and responsible federal agency and work with SI as project owner to comply with the National Environmental Policy Act (NEPA). NCPC and SI will prepare an Environmental Assessment (EA) to analyze the potential environmental impacts associated with this project, in accordance with NEPA. The preparation of the EA will enable SI and NCPC to evaluate and analyze the environmental impacts of the project and alternatives under consideration. Concurrently, SI will conduct consultation under Section 106 of the National Historic Preservation Act.

Related Comment Opportunities

These opportunities are managed by other agencies and are included because of their potential relationship to NCPC’s work, and as a courtesy to the public. Questions and comments should be directed to the lead agency.

United States National Arboretum Elevated Canopy Trail

Environmental Assessment

Project: #8538
Closing Date: April 28, 2024
Agency Seeking Comment/Posting Notice: United States Department of the Interior, National Arboretum
Input Requested:
Public comments on the draft Enviromental Assessment

Submit comments to:
If you wish to comment on the draft EA, you can email or mail comments to Dr. Richard T. Olsen, Director, U.S. National Arboretum, 3501 New York Avenue, NE, Washington, DC 20002. (202) 245-4539.
USNA.comments@usda.gov

All comments must be received no later than April 28, 2024.

Description of Project:
The U.S. Department of Agriculture, Agricultural Research Service, U.S. National Arboretum (USNA) has prepared an Environmental Assessment (EA) to analyze the potential impacts associated with the proposed construction and operation of a canopy trail attraction at the USNA in Washington, DC. The purpose of the proposed action is to expand educational and visitor opportunities, as well as generate revenue for the USNA.

This notice announces the availability of the draft EA for public review and comment. The EA was prepared in accordance with the National Environmental Policy Act of 1969, 40 CFR Parts 1500–1508, and evaluates the potential impacts of the Build Alternative and No Build Alternative. The proposed Build Alternative consists of constructing three self-guided, aboveground canopy trails that would weave through an existing, forested area of the Arboretum. The trails would consist of a series of ADA-compliant static bridges, as well as suspension bridges, which connect to platforms attached to existing trees.

Commission Action Requested: Preliminary Site and Building Plan Review

Expected Date of NCPC Action: May 2, 2024