HydroBASINS lev08 watershed · #7080422320
Bassin de Spearfish Creek
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 5 administrative regions : Butte, Crook, Lawrence, Pennington, Weston
Sub-basin area
2 397km²
Upstream area
2 397,2km²
Discharge
4,3m³/s
Mean elev.
1 498m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- Crook1128.4 km²47.0% of basin
- Lawrence1120.3 km²46.6% of basin
- Butte99.3 km²4.1% of basin
- 30.4 km²1.3% of basin
- Pennington23.5 km²1.0% of basin
9 intersecting protected areas
Lower Sand Creek
IUCN VEasement
8.89 km² overlap
State Wildlife Management Area
8.73 km² overlap
Coxes-mirror Lakes
IUCN VLake
4.18 km² overlap
State Wildlife Management Area
4.00 km² overlap
Conservation Area
2.36 km² overlap
State
IUCN VRecreation Area
0.81 km² overlap
State Wildlife Management Area
0.11 km² overlap
Iron Creek
IUCN VLake
0.09 km² overlap
Lower Sand Creek Fee
IUCN VPrivate Conservation Land
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 695 distinct species · 99 066 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Spearfish Creek : 30 espèces reliées par 128 interactions GloBI sur 4 types (connectance 14.9%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
6,5°C
Annual rain
537mm
Moisture idx (CMI)
-0,43
Runoff
67mm/an
PET
950mm
AET
463mm
Mean slope
6,2°
Water table
557cm
Forest
60%
Crops
10%
Urban
1%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)