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Water Level Rising Slightly
Up 0.02 m since 14:00, rising slightly
0.09

Cranwell Line Sluice

Slea ⚙ Structure
Witham catchment • Sleaford • Lincolnshire • ID: E4405 • Level
(26m ago) • 4 readings/hr • 116 views

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Not an emergency service — if in danger call 999. Alerts rely on EA/SEPA/NRW data and are best-efforts. Terms

Current Level
0.088 mASD
▲ Rising slightly
24h Max
0.090 mASD
24h Min
0.067 mASD
Typical Range
0.04 - 0.71
mASD
Highest Recorded
0.73 mASD
EA official record
A 1.42 reading (31 Jan 2014) sits in our unverified raw history and is not treated as the record
Current level is 12% of this
🚽 Sewage overflows nearby

Recent Water Levels

🌍 floodradar.co.uk
1 day

Flood predictions aren't generated for lock / structure gauges — their levels are driven by gate operation, not by catchment rainfall, so the forecast models would have no skill here.

Recent Readings

Rising · +1 cm over 6h
10 Oct 22:00 ▬ steady 0.088 mASD
10 Oct 21:50 ▲ +0.1 cm 0.088 mASD
10 Oct 21:30 ▬ steady 0.087 mASD
10 Oct 21:20 ▬ steady 0.087 mASD
10 Oct 21:00 ▲ +0.1 cm 0.087 mASD
10 Oct 20:45 ▬ steady 0.086 mASD
10 Oct 20:30 ▬ steady 0.086 mASD
10 Oct 20:15 ▬ steady 0.086 mASD
10 Oct 20:00 ▬ steady 0.086 mASD
10 Oct 19:30 ▬ steady 0.085 mASD
10 Oct 19:15 ▲ +0.1 cm 0.085 mASD
10 Oct 19:00 ▬ steady 0.084 mASD
10 Oct 18:35 ▲ +0.1 cm 0.084 mASD
10 Oct 18:00 ▲ +0.1 cm 0.083 mASD
10 Oct 17:45 ▬ steady 0.082 mASD
10 Oct 17:30 ▲ +0.1 cm 0.082 mASD
10 Oct 17:05 ▲ +0.3 cm 0.081 mASD
10 Oct 16:30 ▲ +0.1 cm 0.078 mASD
10 Oct 16:15 ▲ +0.1 cm 0.077 mASD
10 Oct 16:00 0.076 mASD

Station Details

  • Monitoring Station: Cranwell Line Sluice
  • Watercourse: River Slea
  • Nearest Town: Sleaford
  • County: Lincolnshire
  • Coordinates: 53°0'0"N 0°25'40"W (53.000010, -0.427906)
  • Open in: Google Maps · Apple Maps (opens your maps app)
  • Date Opened: 1 Jan 1995
  • Status: Active
  • Station Type: River level station
Technical details: references, datum, range, flow archive
  • Station Reference: E4405
  • RLOI id: 6069 (the EA's check-for-flooding station id)
  • EA Gauge ID: E4405-level-stage-i-15_min-mASD
  • Parameter: Level
  • Unit: mASD
  • Typical rise rate: 1 cm/hr (p95 sustained over 90 days)
  • Typical data delay: ~17 min (measured reading→publication lag)
  • Tidal: No
  • Lock / structure: ⚙ Yes — lock, weir, sluice or pump
  • Catchment Area: Witham
  • Datum: 14.290m AOD
  • Typical Range: 0.040 – 0.710 mASD
  • EA Cross-check: 0.09 mASD (EA at 10 Oct 21:50)

Geographic coordinates may reflect the access point for the gauge, and not the precise location in the watercourse that it is taking readings from.

Nearby Stations

Gauges connected to this river, and others nearby. A distance “by river” follows the river on the map; any other is in a straight line.

Connected downstream

Nearby

Distances by river: OS Open Rivers. Contains OS data © Crown copyright and database rights 2026.

💧 Storm overflows upstream of this gauge

None of the storm overflows FloodRadar holds is traced upstream of this gauge on the mapped river network. That is not the same as none: the map leaves out many small streams and culverts, so an overflow it cannot place may still drain here, and not every company publishes every overflow. Those nearby are listed below.

Nearby, connection not known

Within 6 km in a straight line, but the river map cannot say whether their water passes this gauge.

💧
Anglian Water · into Unknown Trib. Nine Foot Drain · 1.0 km away in a straight line · no mapped watercourse close enough to be sure
4 spills · 6 hours in 2025
Not discharging now · last
💧
Anglian Water · into The Beck To A Trib Of River Sl · 2.6 km away in a straight line · its watercourse is not on the river map
71 spills · 672 hours in 2025
Not discharging now · last
💧
Anglian Water · into Leasingham Beck · 3.0 km away in a straight line · its water cannot be followed on the map
0 spills · 0 hours in 2025
Not discharging now · last
💧
Anglian Water · into Old River Slea · 3.3 km away in a straight line · its water cannot be followed on the map
40 spills · 219 hours in 2025
Not discharging now · last
💧
Anglian Water · into Old River Slea · 3.3 km away in a straight line · its water cannot be followed on the map
8 spills · 25 hours in 2025
Not discharging now · last
💧
Anglian Water · into Ditch To Swallow Hole · 5.6 km away in a straight line · its recorded watercourse is not the one mapped beside it
2 spills · 5 hours in 2025
Not discharging now · last
💧
Anglian Water · into Ruskington Beck · 5.7 km away in a straight line · several watercourses close by, nothing to choose between them
10 spills · 69 hours in 2025
Not discharging now · last
💧
Anglian Water · into The Ruskington Beck · 5.8 km away in a straight line · its recorded watercourse is not the one mapped beside it
3 spills · 4 hours in 2025
Not discharging now · last

2 other overflows within 6 km are downstream of this gauge or on another branch of the river network, so they are not listed.

These are the water companies' monitor statuses; a spill does not by itself explain a change in the gauge level. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels. Explore the sewage map →

Contains OS data © Crown copyright and database rights 2026.

Rainfall & Weather

Loading rainfall and weather data...

How often this river runs high

This gauge rarely reaches its typical high of 0.71 m: 0 days since 2017. This year so far: 0 days.

2026 0 days so far
2025 0 days
2024 0 days
2023 0 days
2022 0 days
2021 0 days
2020 0 days
2019 0 days
2018 0 days
2017 0 days

Counted from each day's highest reading. Days with missing or implausible readings are left out.

Flood history near this gauge

Official Environment Agency warnings issued since 2016 for the 4 flood areas linked to this gauge (nearest 0.6 km away).

15flood warnings 0flood alerts

Most recent flood warning: 9 Jan 2026 — Ruskington Beck in Ruskington

Year by year
YearWarningsAlerts
2026 1 0
2025 1 0
2024 1 0
2023 2 0
2020 3 0
2019 6 0
2016 1 0

Warnings apply to a whole flood area, not necessarily this exact spot. Years before 2006 aren't covered by the EA's historic record. See also the Sleaford flood history.

Flood areas linked to this gauge

Flood warnings and alerts are issued for whole areas. These are the 4 areas linked to this gauge, nearest first.

Frequently asked questions

Is the River Slea at Cranwell Line Sluice flooding today?

The current level is 0.09m, which is within the typical range of 0.04 to 0.71m. Flooding is unlikely at this level.

Is the river level rising or falling at Cranwell Line Sluice?

Based on the most recent readings, the level is currently rising slightly. The chart above shows the last 12 hours of measurements by default (up to 7 days), updated roughly every 15 minutes.

What is a normal level for the River Slea at Cranwell Line Sluice?

The typical range at this station is 0.04m to 0.71m, based on Environment Agency historical data. Levels above 0.71m are higher than usually seen and may indicate a flood risk.

How often is this river level data updated?

Readings are supplied by the Environment Agency gauge. FloodRadar checks for updates roughly every 15 minutes; the timestamp above shows how recent the latest available reading is.

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📮 Flood risk by postcode near this gauge

Postcodes within 5 km with properties in the Environment Agency’s rivers-and-sea flood-risk bands:

Check any UK postcode’s flood risk →

🏠 Buying or renting around here? Get the Property Flood-Risk Report for any English postcode — official risk band, recorded floods, warning history, river behaviour and nearby storm overflows. £19 one-off. Learn more →