994 miles of mapped stream across 755 square miles of drainage in Chester, Delaware counties, in 87 named streams. Pennsylvania designates 232 of those miles as trout water, on 51 streams. The 11 mainstem gauges with a July record read between 67.8 and 76.8°F in July.
Open in BirdTrout50°F and colder is cold, through cold-transitional and cool, to warm above 70°F — the same four bands the app paints. On this map the colour is PA DEP's own classification of the stream, not a measurement, except at the gauge dots, which read live. Grey is water PA DEP has not typed.
HUC8 02040205 in the USGS Watershed Boundary Dataset. Every figure below adds up the river pages in this basin — same records, one basin at a time.
Pennsylvania publishes no thermal class. What PA DEP publishes is a Chapter 93 designated use — Cold Water Fishes, Trout Stocking, Warm Water Fishes and the rest — which names the fishery a stream is protected for. It is the closest any agency here comes to a temperature without being one, and docs/pa-thermal-fit.md is where the distinction is measured rather than asserted. It covers 70% of this basin's stream miles (697.2 of 994); the rest is untyped and is drawn grey on the map above.
168.1 of the 697.2 typed miles in this basin — 24% — are cold or cold-transitional water. The dominant class is cool.
All 87 of them, longest first. 8 have a page of their own and are linked; the rest are in the app. The class column is PA DEP's designation of that stream. "Now" is the live USGS reading where a gauge stands in that stream.
| Stream | Miles | Class | Now | Designation |
|---|---|---|---|---|
| West Branch Brandywine Creek | 33.6 | Cool | — | Trout Stocking |
| East Branch Brandywine Creek | 28.8 | Cool | — | Trout Stocking |
| White Clay Creek | 20.1 | Cool | — | Cold Water Fishes, Trout Stocking |
| Buck Run | 19.0 | Cool | — | Trout Stocking |
| Christina River | 17.6 | Warm | — | — |
| Broad Run | 14.7 | Cold | — | Cold Water Fishes |
| Red Clay Creek | 14.4 | Cold | — | Cold Water Fishes |
| Brandywine Creek | 14.3 | Warm | — | — |
| East Branch White Clay Creek | 13.6 | Cold | — | Cold Water Fishes |
| Beaver Creek | 12.5 | Cold | — | Cold Water Fishes |
| Middle Branch White Clay Creek | 11.5 | Cool | — | Trout Stocking |
| Valley Creek | 11.0 | Cold | — | Cold Water Fishes |
| Doe Run | 9.9 | Cool | — | Trout Stocking |
| West Branch Red Clay Creek | 9.9 | Cool | — | Trout Stocking |
| Mill Creek | 9.6 | Cold | — | Cold Water Fishes |
| Marsh Creek | 9.3 | Cool | — | Trout Stocking |
| West Branch White Clay Creek | 8.8 | Cool | — | Trout Stocking |
| Birch Run | 7.7 | Cool | — | Cold Water Fishes, Trout Stocking |
| Pocopson Creek | 7.3 | Cool | — | Trout Stocking |
| Pike Creek | 6.8 | untyped | — | — |
| Indian Run | 6.5 | Cold | — | Cold Water Fishes, Trout Stocking |
| East Branch Red Clay Creek | 6.5 | Cool | — | Trout Stocking |
| West Branch Christina River | 6.2 | untyped | — | — |
| Radley Run | 5.6 | Warm | — | — |
| Burrows Run | 5.2 | Cold | — | Cold Water Fishes |
| Middle Run | 5.1 | untyped | — | — |
| Taylor Run | 4.7 | Cool | — | Trout Stocking |
| Culbertson Run | 4.4 | Cool | — | Trout Stocking |
| Wilson Run | 4.3 | Warm | — | — |
| Shamona Creek | 3.9 | Cool | — | Trout Stocking |
| Black Horse Creek | 3.7 | Cool | — | Trout Stocking |
| Sucker Run | 3.7 | Warm | — | — |
| Hyde Run | 3.7 | untyped | — | — |
| East Branch Christina River | 3.6 | Warm | — | — |
| Ring Run | 3.5 | Warm | — | — |
| Bennetts Run | 3.4 | Warm | — | — |
| Plum Run | 3.4 | Warm | — | — |
| Lost Trail Creek | 3.1 | untyped | — | — |
| South Brook | 3.1 | Cool | — | Trout Stocking |
| Green Valley Creek | 3.0 | Cold | — | Cold Water Fishes |
| Two Log Run | 2.8 | Cool | — | Trout Stocking |
| Harvey Run | 2.8 | Warm | — | — |
| Dennis Run | 2.6 | Warm | — | — |
| Craigs Mill Run | 2.6 | Warm | — | — |
| Brinton Run | 2.5 | Warm | — | — |
| North Branch Indian Run | 2.4 | Cold | — | Cold Water Fishes |
| Lamborn Run | 2.3 | Cold | — | Cold Water Fishes |
| Bucktoe Creek | 2.2 | Cool | — | Trout Stocking |
| Lyons Run | 2.1 | Cool | — | Trout Stocking |
| Rocky Run | 2.1 | untyped | — | — |
| Station Creek | 1.9 | Cold | — | Cold Water Fishes |
| Persimmon Run | 1.9 | untyped | — | — |
| Blackhorse Run | 1.8 | Cool | — | Trout Stocking |
| Scarlett Run | 1.8 | Cool | — | Trout Stocking |
| Trout Run | 1.7 | Cold | — | Cold Water Fishes |
| Egypt Run | 1.7 | Cold | — | Cold Water Fishes |
| Quartz Creek | 1.7 | Cool | — | Trout Stocking |
| Wickersham Run | 1.5 | Cold | — | Cold Water Fishes |
| Walnut Run | 1.5 | Cold | — | Cold Water Fishes |
| Red Fox Run | 1.3 | untyped | — | — |
| Woodcock Rill | 1.3 | Cool | — | Trout Stocking |
| Sycamore Run | 1.2 | Cold | — | Cold Water Fishes |
| Tannery Run | 1.2 | Cold | — | Cold Water Fishes |
| Agnew Run | 1.2 | Cool | — | Trout Stocking |
| Mason Dixon Run | 1.1 | Warm | — | — |
| Evans Brook | 1.1 | untyped | — | — |
| Barnard Run | 1.0 | Warm | — | — |
| Hurricane Run | 1.0 | untyped | — | — |
| Bogy Run | 0.9 | untyped | — | — |
| Ramsey Run | 0.9 | untyped | — | — |
| Lenni Lenape Run | 0.8 | Cold | — | Cold Water Fishes |
| Brickyard Run | 0.8 | Cold | — | Cold Water Fishes |
| Indian Hannah Run | 0.7 | Warm | — | — |
| Sweet Creek | 0.7 | Cold | — | Cold Water Fishes |
| Laurel Woods Run | 0.7 | Cold | — | Cold Water Fishes |
| Red Tail Run | 0.6 | Cold | — | Cold Water Fishes |
| Chandlers Run | 0.6 | Cold | — | Cold Water Fishes |
| Lost Stream | 0.6 | untyped | — | — |
| John Smedley Run | 0.5 | Cold | — | Cold Water Fishes |
| Corundum Run | 0.5 | untyped | — | — |
| Mushroom Run | 0.5 | Cold | — | Cold Water Fishes |
| Carney Run | 0.5 | untyped | — | — |
| Owl Run | 0.4 | Warm | — | — |
| Serpentine Run | 0.4 | untyped | — | — |
| Wood Duck Run | 0.4 | untyped | — | — |
| Feldspar Run | 0.3 | untyped | — | — |
| Muddy Run | 0.1 | untyped | — | — |
No public land in this basin is joined to the stream network on our map.
The subbasins that share a boundary with this one and carry coldwater streams.