Doorvaartopening 1 (vast) brug Spannenburg

Opening #31 · route 21467500

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Latest Clearance

7.07 m ok

Water station: lemmer.woudagemaal.stroomkanaal Lemmer stroomkanaal Woudagemaal
Water observed: 2026-08-28 04:00:00
Water level: -0.520 m
Calculated: 2026-08-28 06:10:39
Formula: kp_clearance_height_adjusted_by_current_nap_water_level

FIS Opening Fields

Source id: fis.opening:31
Parent id: 33165 (bridge)
Reference level: n/a
Height closed: 6.550 m
Clearance height closed: 7.070 m
Height opened: n/a
Width: 10.000 m
Sill depth: n/a
Route km: 110.700 - 110.671

Parent Bridge

Name: Brug Spannenburg
Local id: 1391
RWS id: 33165
Source id: fis.bridge:1391
Reference level: KP
MHW reference: CANAL
MHW offset: n/a
Can open: yes

Linked Water Stations

Station	Method	Distance	Confidence	Latest Observation	Level
`lemmer.woudagemaal.stroomkanaal` Lemmer stroomkanaal Woudagemaal	nearest_spatial	7,197 m	0.28	2026-08-28 04:00:00	-0.520 m

Recent Clearance History

Calculated	Water Observed	Water Level	Clearance	Status	Formula
2026-08-28 06:10:39	2026-08-28 04:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 05:10:28	2026-08-28 03:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 04:10:15	2026-08-28 02:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 03:10:04	2026-08-28 02:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 02:09:52	2026-08-28 00:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 01:09:40	2026-08-28 00:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-28 00:09:28	2026-08-27 23:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 23:09:16	2026-08-27 21:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 22:09:04	2026-08-27 21:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 21:08:52	2026-08-27 19:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 20:08:39	2026-08-27 19:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 19:08:26	2026-08-27 18:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 18:08:11	2026-08-27 17:00:00	-0.530 m	7.080 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 17:07:49	2026-08-27 15:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 16:07:30	2026-08-27 14:00:00	-0.520 m	7.070 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 15:07:18	2026-08-27 13:00:00	-0.490 m	7.040 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 14:07:06	2026-08-27 12:00:00	-0.500 m	7.050 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 13:06:55	2026-08-27 11:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 12:06:43	2026-08-27 10:00:00	-0.500 m	7.050 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`
2026-08-27 11:06:31	2026-08-27 09:00:00	-0.510 m	7.060 m	ok	`kp_clearance_height_adjusted_by_current_nap_water_level`

Calculation Basis

{
    "formula": {
        "kind": "kp_clearance_height_adjusted_by_current_nap_water_level",
        "expression": "clearance_height_closed_m + ((height_closed_m - clearance_height_closed_m) - water_level_m)",
        "water_source": "water_level_observation.value_m",
        "height_source": "fis_bridge_opening.clearance_height_closed_m adjusted by inferred KP level",
        "kp_reference_level_nap": -0.52,
        "reference_level_source": "fis_bridge.reference_level",
        "reference_level_decision": "KP is treated as fixed kanaalpeil; FIS clearance height is adjusted by the current NAP water level delta from inferred KP",
        "effective_reference_level": "KP",
        "current_water_delta_from_kp_m": 0
    },
    "station_link": {
        "active": true,
        "method": "nearest_spatial",
        "confidence": 0.2803,
        "distance_m": 7196.6,
        "reviewed_at": null
    },
    "parent_bridge": {
        "id": 1391,
        "name": "Brug Spannenburg",
        "rws_id": "33165",
        "can_open": true,
        "source_id": "fis.bridge:1391",
        "mhw_offset": null,
        "reference_level": "KP",
        "mhw_reference_level": null
    },
    "bridge_opening": {
        "id": 31,
        "name": "Doorvaartopening 1 (vast) brug Spannenburg",
        "route_id": "21467500",
        "source_id": "fis.opening:31",
        "fairway_id": "21467376",
        "route_km_end": 110.671,
        "route_km_begin": 110.7,
        "height_closed_m": 6.55,
        "height_opened_m": null,
        "reference_level": null,
        "fairway_section_id": "30985967",
        "clearance_height_closed_m": 7.07,
        "clearance_height_opened_m": null
    },
    "water_observation": {
        "value_m": -0.52,
        "value_cm": -52,
        "observed_at": "2026-08-28T04:00:00+00:00",
        "process_type": "meting",
        "quality_code": "00",
        "retrieved_at": "2026-08-28T06:10:32.515986+00:00",
        "station_code": "lemmer.woudagemaal.stroomkanaal",
        "reference_level": "NAP"
    }
}

Geometry GeoJSON

{
    "type": "Point",
    "coordinates": [
        5.700380802,
        52.910555858
    ]
}

Raw FIS JSON

{
    "id": 31,
    "type": "Feature",
    "geometry": {
        "type": "Point",
        "coordinates": [
            5.700380802000041,
            52.910555858000066
        ]
    },
    "properties": {
        "id": 1871,
        "name": "Doorvaartopening 1 (vast) brug Spannenburg",
        "note": null,
        "type": "VST",
        "width": 10,
        "isrsid": 26633425,
        "number": 1,
        "geotype": "opening",
        "routeid": 21467500,
        "vincode": "3569",
        "objectid": 31,
        "parentid": 33165,
        "condition": "CONSTRUCTED",
        "fairwayid": 21467376,
        "silldepth": null,
        "routekmend": 110.67062836999999,
        "foreigncode": null,
        "orientation": "0",
        "widthconvoy": 10,
        "heightclosed": 6.55,
        "heightopened": null,
        "routekmbegin": 110.7,
        "geogeneration": 3808,
        "parentgeotype": "bridge",
        "fairwaysectionid": 30985967,
        "passagedurationm": 0,
        "clearanceheightclosed": 7.07,
        "clearanceheightopened": null
    }
}