SEMHRA - SE Montana Hydrological Resource Agent - 🦞 CrawDaddy 2.0

Real-time USGS river monitoring dashboard for Park & Gallatin Counties, Montana.

Live Demo

Open index.html in any browser — no build step, no server, no dependencies to install.

Or deploy to GitHub Pages:

1. Push this repo
2. Settings → Pages → Source: main branch → /root
3. Your dashboard is live at https://yourusername.github.io/crawdaddy/

What It Does

Monitors 10 USGS streamgage stations across two Montana counties with live data:

Park County (5 stations)

USGS ID	Station	River
06191500	Corwin Springs	Yellowstone River
06192500	Near Livingston	Yellowstone River
06192980	Ab Smith Cr, nr Wilsall	Shields River
06193500	At Clyde Park	Shields River
06195600	Nr Livingston	Shields River

Gallatin County (5 stations)

USGS ID	Station	River
06043120	Ab Deer Cr, nr Big Sky	Gallatin River
06043500	Nr Gallatin Gateway	Gallatin River
06048000	At Bozeman	East Gallatin River
06048650	Ab WRF, nr Bozeman	East Gallatin River
06052500	At Logan	Gallatin River

Data Sources

• Streamflow: USGS Water Services API — Instantaneous Values (15-min intervals)
  • Discharge (ft³/s), Gage height (ft), Water temperature (°C)
• Weather: NWS API — Current observations + forecast
• Fallback: Seed data from Feb 15, 2026 if APIs are unreachable

How It Works

index.html
├── React 18 (CDN)
├── Recharts (CDN) 
├── Babel Standalone (CDN, for JSX transpilation)
├── USGS NWIS API (fetch → parse → render)
├── NWS Weather API (points → observations → forecast)
└── Seed data fallback (embedded)

Single file. Zero build. Zero dependencies. Just HTML + CDN-loaded libraries.

On load, the app:

1. Shows seed data immediately (cached USGS readings)
2. Attempts live fetch from waterservices.usgs.gov
3. If successful, replaces seed with live data + 24hr sparklines
4. Auto-refreshes every 2 minutes
5. Falls back to seed if USGS is unreachable

USGS API Reference

The app queries this endpoint:

https://waterservices.usgs.gov/nwis/iv/?format=json
  &sites=06191500,06192500,06192980,06193500,06195600,06043120,06043500,06048000,06048650,06052500
  &parameterCd=00060,00065,00010
  &siteStatus=active
  &period=P1D

Parameter codes:

• 00060 — Discharge (streamflow), cubic feet per second
• 00065 — Gage height, feet
• 00010 — Water temperature, degrees Celsius

Deployment Options

GitHub Pages (simplest)

git init
git add index.html README.md
git commit -m "CrawDaddy 2.0"
git remote add origin https://github.com/YOU/crawdaddy.git
git push -u origin main
# Enable Pages in repo settings

Any Static Host

Just upload index.html. Works on Netlify, Vercel, Cloudflare Pages, S3, or any web server.

Local

# Just open it
open index.html

# Or serve it
python3 -m http.server 8000
# → http://localhost:8000

Notes

• Some stations are seasonal — Shields River at Clyde Park (06193500), Shields River ab Smith Cr (06192980), and East Gallatin at Bozeman (06048000) may show as offline during winter months
• All USGS data is provisional and subject to revision
• The USGS API is free, requires no API key, and supports CORS
• The NWS API requires a User-Agent header but no key

License

MIT — Data from USGS and NWS is public domain.