King County AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator - Single System Category Application

Sep 13, 2026

Uploaded by Mimi

The King County AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator improves how the Department of Public Health reviews major construction proposals by combining Geographic Information Systems (GIS) with generative artificial intelligence to draft SEPA review letters. The system guides health-equity advocacy in the built environment, using publicly available data to analyze neighborhood conditions—such as tree cover, pollution, and transit and green-space access—along with health disparities. It reduces letter turnaround time from about five hours to about 20 minutes per letter, expanding review capacity and enabling more equitable, locally sensitive recommendations.

LanguageEnglish

CategoryForms

FormatPDF

Pages21

Reading Time7 min

AccessFree to download

Single System Application

Application Outline

Section A

Section B

Section C: System Design

Section D: Implementation

Section E: Organizational Impact

Section F: System Resources

Appendix: Illustrations and Figures

King County AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator King County Department of Information Technology King County GIS Center 2025 URISA Exemplary Systems in Government Award Single System Application Application Outline Section A: 1. Name of System and ESIG Category a. AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator b. Single System Category Application 2. Letter from King County Chief Technology Officer Tamara Davis, authorizing this submission. 3. Summary of what the AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator System accomplishes and why it is exemplary. 4. Three (3) user testimonials. Section B: 1. Jurisdiction information Section C, D, E, F: C. System Design D. Implementation E. Organizational Impact F. System Resources Appendix: 1. Illustrations and Figures King County AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator 2025 URISA Exemplary Systems in Government Award – Single System Category Application Application Section A.3 What the King County AI-GIS-Strengthened State Environmental Policy Act (SEPA) Response Letter Generator System accomplishes: The goal of this project was to better guide and advocate for health equity in the built environment by significantly increasing the number and quality of construction project proposals that King County’s Department of Public Health staff can review. Using King County’s Geographic Information Systems (GIS) with Generative Artificial Intelligence (GenAI), our innovative application leverages publicly available data to generate SEPA review letters. This project has significantly improved King County’s capacity and efficiency to review projects, saving what would otherwise take thousands of hours annually to accomplish. What is unique about the application is the ability it affords King County government to fulfill our promise to the public to serve as responsible stewards of our beautiful natural landscape – and protect our most vulnerable residents’ health. By reviewing additional construction proposals, the application also grows equity and social justice in our community by ensuring development activities are sensitive to local conditions and that Public Health guidance is advancing best and exemplary practices in community development. The challenges before this system was developed Washington’s State Environmental Policy Act (SEPA), adopted in 1971, requires that local government agencies have an opportunity to assess and mitigate the environmental impacts of all major construction proposals. This includes public facilities and private projects such as an office building, grocery store, or apartment complex. Under SEPA, local government can review a proposal’s environmental analysis and weigh in before final permitting decisions are made. The SEPA review process helps agency decision-makers, applicants, and the public understand how the proposal will affect the environment and determinants of health. SEPA can be used to modify or deny a proposal to avoid or reduce probable impacts, and promote protective factors that are otherwise in short supply. For construction projects in King County, the Department of Public Health (DPH) is the local agency charged with reviewing environmental impacts and providing feedback. The SEPA review evaluates neighborhood conditions including tree cover, pollution, and access to transit, parks, and recreational trails. It also considers health disparities for residents in the neighborhood such as high rates of asthma, COPD (chronic obstructive pulmonary disorder), and obesity. Based on these conditions – and the typeof construction project proposed – the SEPA reviewer makes recommendations that improve population health and advance health equity, such as adding trees, carpool parking, bicycle parking, and improved pedestrian access to nearby

FAQs

What does the AI-GIS-Strengthened SEPA Response Letter Generator help King County do?

It generates SEPA review letters by using GIS with generative AI to evaluate environmental and health impacts of proposed construction projects and recommend modifications before permitting decisions.

How does the system improve efficiency compared with the prior process?

The previous process took about five hours of staff time per letter, while the GIS+GenAI approach reduces drafting time to about 20 minutes per letter.

What data and neighborhood factors are used to inform the SEPA recommendations?

The approach draws on publicly available data and cross-references multiple sources to assess conditions such as tree cover, pollution burden, and access to transit, parks, and trails, while also considering health disparities like asthma, COPD, and obesity.

Sep 13, 2026

Uploaded by Mimi