Spoon River Lens

London Mills, Fulton & Knox counties, up both forks to the source & down to Havana.

River reaches, source to mouth

Layers

Ground Historic overlay

Overlay opacity 75% Spoon River & forks, highlighted River towns

Today's running water

Every stream & ditch (USGS NHD) Spoon drainage basin, HUC 07130005 Subwatersheds, HUC 12 (zoom 11+)

Basin area: loading

The verdigris network rides above every historic sheet & both sides of the swipe, so you can read where 1870 water ran against where it runs now. Wide views show main streams; zoom 11 & closer adds every mapped creek & ditch.

County plats come from scanned atlas books, so edges between counties may not meet exactly, & a county with no edition near the chosen era stays blank. Plats draw from about 1:600,000 inward.

Trace a channel

Click from upstream to downstream. Click the last point again, or press Finish, to close it. Esc cancels.

Trace name Traced against

Selected trace

Trace: none yet
Length: 0 ft
Miles: 0
Chains / rods: 0 ch / 0 rd
Upstream elev.: n/a
Downstream elev.: n/a
Fall: n/a
Avg grade: n/a

Samples the USGS 3DEP ground model (max 60 points). Over open water the model reads the water surface, which is what you want for river fall.

All traces

No traces yet.

Sources

Plat atlases: Illinois DNR, maps.dnr.illinois.gov. Historic topos: USGS Historical Topographic Map Collection via Esri. Aerials, topo & hydrography: USGS The National Map (NAIP). Elevation: USGS 3DEP.