# Knowles Drain

Knowles Drain is a canal in [Gratiot County](https://ontology.bommaritollc.com/id/01a0ca47-5953-7311-ac48-68f224372975), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (4.4 km long), in the [Pine Creek-Maple River (HUC10 0405000502)](https://ontology.bommaritollc.com/id/01a0de92-1d79-7067-ace1-1c5c9f44a874) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9f5e9e875a>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Gratiot County](https://ontology.bommaritollc.com/id/01a0ca47-5953-7311-ac48-68f224372975)

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

Location: 43.20614, -84.81112 (box -84.81131, 43.18838, -84.80120, 43.21974; west, south, east, north)

- `adms:identifier`: [gnis 629828](https://ontology.bommaritollc.com/id/01a0ddfe-baf4-7780-b384-0645eea08ec4)
- `dcterms:type`: [canal](https://ontology.bommaritollc.com/vocab/geo/gnisCanal)
- `geo:hasDefaultGeometry`: [shape of Knowles Drain](https://ontology.bommaritollc.com/id/01a0de2c-cd71-7119-b67b-e92ded70cdfc)
- `geo:hasGeometry`:
  - [point of Knowles Drain](https://ontology.bommaritollc.com/id/01a0ddfe-f263-76f1-9cea-1a6f757ebc66)
  - [shape of Knowles Drain](https://ontology.bommaritollc.com/id/01a0de2c-cd71-7119-b67b-e92ded70cdfc)
- `geo:hasMetricLength`: 4358.7 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Pine Creek-Maple River (HUC10 0405000502)](https://ontology.bommaritollc.com/id/01a0de92-1d79-7067-ace1-1c5c9f44a874)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9ec4656796)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-5186-7240-b062-d50f71c5f297)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-1709-712e-a40e-97543c2f0bf5)
- `schema:containedInPlace`:
  - [Gratiot County](https://ontology.bommaritollc.com/id/01a0ca47-5953-7311-ac48-68f224372975)
  - [New Haven Township](https://ontology.bommaritollc.com/id/01a0ca47-77e8-7733-99ee-e2a95d80eb58)
  - [North Shade Township](https://ontology.bommaritollc.com/id/01a0ca47-780d-73a4-a10c-82f8f97c37ad)
- `skos:prefLabel`: Knowles Drain

## Elsewhere

- [Wikidata Q33202699](https://www.wikidata.org/wiki/Q33202699) (proposed match (exactMatch))
- [USGS GNIS 629828](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/629828) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=43.20614&mlon=-84.81112#map=14/43.20614/-84.81112) (43.20614, -84.81112)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=43.20614,-84.81112)
- [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/Q33202699 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-75c5-751b-b7dc-e488c9e97995)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9f5e9e875a.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9f5e9e875a.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9f5e9e875a.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9f5e9e875a)
Cite as: Knowles Drain. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-baf3-7158-bcc8-7e9f5e9e875a
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.