# Gray Lake

Gray Lake is a lake in [Jefferson Township](https://ontology.bommaritollc.com/id/01a0ca47-75db-7740-8e1d-3706136633a7), [Cass County](https://ontology.bommaritollc.com/id/01a0ca47-5a46-7564-a1ca-981ba967c897), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (15.5 ha), in the [Brandywine Creek-Saint Joseph River (HUC10 0405000122)](https://ontology.bommaritollc.com/id/01a0de92-1d2d-7700-8a5f-f288dfea1ba5) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-60370a214727>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Cass County](https://ontology.bommaritollc.com/id/01a0ca47-5a46-7564-a1ca-981ba967c897) › [Jefferson Township](https://ontology.bommaritollc.com/id/01a0ca47-75db-7740-8e1d-3706136633a7)

Type: [geo:Feature](http://www.opengis.net/ont/geosparql#Feature), [schema:LakeBodyOfWater](https://schema.org/LakeBodyOfWater), [schema:Place](https://schema.org/Place)

Location: 41.85083, -86.06818 (box -86.07215, 41.84921, -86.06490, 41.85267; west, south, east, north)

- `adms:identifier`: [gnis 627259](https://ontology.bommaritollc.com/id/01a0ddfe-b6ab-757b-b537-b3fbc68f0cd0)
- `dcterms:type`: [lake](https://ontology.bommaritollc.com/vocab/geo/gnisLake)
- `geo:hasDefaultGeometry`: [shape of Gray Lake](https://ontology.bommaritollc.com/id/01a0de2c-cad0-745d-af4c-8709f9e72e10)
- `geo:hasGeometry`:
  - [point of Gray Lake](https://ontology.bommaritollc.com/id/01a0ddfe-ed01-7502-9d5f-97c24652f081)
  - [shape of Gray Lake](https://ontology.bommaritollc.com/id/01a0de2c-cad0-745d-af4c-8709f9e72e10)
- `geo:hasMetricArea`: 154790.8 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Brandywine Creek-Saint Joseph River (HUC10 0405000122)](https://ontology.bommaritollc.com/id/01a0de92-1d2d-7700-8a5f-f288dfea1ba5)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-6036c3718d7a)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-4def-7239-af32-0ea7d5b14a3c)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-16a8-7043-b727-b1bff56e73d3)
- `schema:containedInPlace`:
  - [Cass County](https://ontology.bommaritollc.com/id/01a0ca47-5a46-7564-a1ca-981ba967c897)
  - [Jefferson Township](https://ontology.bommaritollc.com/id/01a0ca47-75db-7740-8e1d-3706136633a7)
- `skos:prefLabel`: Gray Lake

## Elsewhere

- [Wikidata Q33257535](https://www.wikidata.org/wiki/Q33257535) (proposed match (exactMatch))
- [USGS GNIS 627259](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/627259) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=41.85083&mlon=-86.06818#map=14/41.85083/-86.06818) (41.85083, -86.06818)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=41.85083,-86.06818)
- [Source](https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames_MI_Text.zip) (prd-tnm.s3.amazonaws.com)
- [Source](https://3dhp.nationalmap.gov/arcgis/rest/services/usgs_3dhp_all/FeatureServer) (3dhp.nationalmap.gov)
- [Source](https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer) (hydro.nationalmap.gov)

## Pointing here

- Mappings (1; `owl:annotatedSource`):
  - [exactMatch http://www.wikidata.org/entity/Q33257535 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-74ab-7542-b39b-6c9725be9155)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-60370a214727.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-60370a214727.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-60370a214727.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-60370a214727)
Cite as: Gray Lake. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-b6aa-7633-a353-60370a214727
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.