# Alfen Drain

Alfen Drain is a stream in [Monroe County](https://ontology.bommaritollc.com/id/01a0ca47-5a54-7270-b1ce-f936a07d389b), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (2.2 km long), in the [Stony Creek-Frontal Lake Erie (HUC10 0410000101)](https://ontology.bommaritollc.com/id/01a0de92-1ef4-70ba-bc13-4d752e2c89d4) watershed; it flows into [Robert Drain](https://ontology.bommaritollc.com/id/01a0ddfe-c668-76c6-b7a1-15f420efd39a).

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7ac6fb7144>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Monroe County](https://ontology.bommaritollc.com/id/01a0ca47-5a54-7270-b1ce-f936a07d389b)

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

Location: 42.00588, -83.40660 (box -83.42454, 42.00627, -83.40661, 42.01677; west, south, east, north)

- `adms:identifier`: [gnis 619939](https://ontology.bommaritollc.com/id/01a0ddfe-a8fb-7664-b3d6-c4ebe216997a)
- `dcterms:type`: [stream](https://ontology.bommaritollc.com/vocab/geo/gnisStream)
- **flows into** (`bcgeo:flowsInto`): [Robert Drain](https://ontology.bommaritollc.com/id/01a0ddfe-c668-76c6-b7a1-15f420efd39a)
- `geo:hasDefaultGeometry`: [shape of Alfen Drain](https://ontology.bommaritollc.com/id/01a0de2c-c366-72c2-b531-8faefd23925c)
- `geo:hasGeometry`:
  - [point of Alfen Drain](https://ontology.bommaritollc.com/id/01a0ddfe-e18b-74b4-8b19-f484c666adce)
  - [shape of Alfen Drain](https://ontology.bommaritollc.com/id/01a0de2c-c366-72c2-b531-8faefd23925c)
- `geo:hasMetricLength`: 2211.9 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Stony Creek-Frontal Lake Erie (HUC10 0410000101)](https://ontology.bommaritollc.com/id/01a0de92-1ef4-70ba-bc13-4d752e2c89d4)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7986f46aeb)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-4430-71ce-8fd6-b5f997971f76)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-18e0-7243-a6bd-629f8a64b2dd)
- `schema:containedInPlace`:
  - [Monroe County](https://ontology.bommaritollc.com/id/01a0ca47-5a54-7270-b1ce-f936a07d389b)
  - [Frenchtown Charter Township](https://ontology.bommaritollc.com/id/01a0ca47-6871-75b1-b019-d073d7dd999f)
  - [Ash Township](https://ontology.bommaritollc.com/id/01a0ca47-6b6d-7735-884d-082540c5da3a)
  - [Exeter Township](https://ontology.bommaritollc.com/id/01a0ca47-6f35-7698-828f-5e9c6bdd3117)
- `skos:prefLabel`: Alfen Drain

## Elsewhere

- [Wikidata Q34640614](https://www.wikidata.org/wiki/Q34640614) (proposed match (exactMatch))
- [USGS GNIS 619939](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/619939) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=42.00588&mlon=-83.40660#map=14/42.00588/-83.40660) (42.00588, -83.40660)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=42.00588,-83.40660)
- [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/Q34640614 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-734c-733f-9aaf-7dd2aba0ff3a)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7ac6fb7144.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7ac6fb7144.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7ac6fb7144.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7ac6fb7144)
Cite as: Alfen Drain. bc-ontology, release 0.1.0-rc12, 2026-09-27. https://ontology.bommaritollc.com/id/01a0ddfe-a8fa-7187-b7f8-5a7ac6fb7144
Release 0.1.0-rc12, graph hash a20f66b983549f220c6f061b7e40233771a06aa47a0c0aede95a2a57ee2e9553.