Policy paper
River Arun: internal drainage district planned maintenance programme 2025 to 2026
Updated 10 April 2025
Applies to England
© Crown copyright 2025
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This publication is available at https://www.gov.uk/government/publications/river-arun-internal-drainage-district-idd/river-arun-internal-drainage-district-planned-maintenance-programme-2024-to-2025
1. Weed cutting
1.1 Planned weed cutting
| Parish Council | Watercourse / location | Maintained length metres (m) |
|---|---|---|
| Parham | M146 Northbrook ditch - Internal drainage board (IDB) ( Total Length = 1760m) | |
| Section 1/a | 930 | |
| Section 2/b | 830 | |
| M147 Wiggonholt Stream - IDB ( Total Length = 1820m) | ||
| Section 1/a | 1820 | |
| Amberley | M148 Smith’s ditch - IDB ( Total Length = 2090m) | 480 |
| Section 2/b | 1130 | |
| Section 3/c | 480 | |
| M149 Low Brook ditch West - IDB ( Total Length = 1270m) | ||
| Section 1/a | 720 | |
| Section 2/b | 550 | |
| M150 Low Brook ditch - IDB ( Total Length = 2070m) | ||
| Section 1/a | 460 | |
| Section 2/b | 450 | |
| Section 3/c | 620 | |
| Section 4/d | 340 | |
| Section 5/e | 200 | |
| M151 Pound Piece ditch - IDB ( Total Length = 900m) | ||
| Section 1/a | 900 | |
| M152 Smooth ditch - IDB ( Total Length = 580m) | 580 | |
| M153 Middle Gutter ditch - IDB ( Total Length = 2100m) | 1710 | |
| Section 2/b | 390 |
2. Proposed Maintenance Programme 2025 to 2026
2.1 Asset maintenance every 6 monthly from 1 April 2025
| Asset number | Asset type | Location | Maintained by | Water level management, annual grease, operation checks (including strimming, fence repair, gate and lock checks clearance of debris) | National Grid reference |
|---|---|---|---|---|---|
| 271093 | Penstock - control gate | Hoopers / station sitch sluice | Internal drainage board (IDB) | Yes | TQ0123605648 |
| 241451 | Penstock - control gate | Offham island sluice | IDB | Yes | TQ0356708379 |
| 267176 | Penstock - control gate | Amberley lower sluice | IDB | Yes | TQ0217612141 |
| 241498 | Penstock - control gate | Wild Brook (lower) | IDB | Yes | TQ0308114152 |
| 271124 | Penstock - control gate | IDB | Yes | TQ0445217087 | |
| 188705 | Penstock - control gate | Tortington upper Penstock | IDB | Yes | TQ0105805619 |
| 317401 | Screen | Spring ditch weedscreen | IDB (West Sussex County Council) | No | TQ0134106929 |
| 188712 | Penstock - control gate | Spring ditch wluice | IDB | Yes | TQ0136606724 |
| 241836 | Penstock - control gate | Mill Stream upper sluice number 2 | IDB | Yes | TQ0226607714 |
| 188103 | Penstock - control gate | Peppering sluice | IDB | Yes | TQ0327609315 |
| 240474 | Penstock - control gate | Brickyards sluice | IDB | Yes | TQ0281607658 |
| 267144 | Penstock - control gate | Danbridge sluice / Brookfield Penstock | IDB | Yes | TQ0126905341 |
| 241659 | Penstock - control gate | Crooked ditch sluice | IDB | Yes | TQ0098304579 |
| 277696 | Penstock - control gate | Foxes Oven sluice | IDB | Yes | TQ0307609063 |
| 275464 | Weir and flap valve | IDB | Yes | TQ0230511726 | |
| 271133 | Penstock - control gate | Hardham Priory ditch sluice | IDB | Yes | TQ0319516355 |
| 239784 | Screen (Greatham pumping station) | Greatham pumping station screen | IDB | No | TQ0371016503 |
| 276597 | Penstock - control gate | Spinney sluice | IDB | Yes | TQ0455116620 |
| 238191 | Penstock - control gate | Wide Meade ditch sluice | IDB | Yes | TQ0195813717 |
| 255858 | Penstock - control gate | Timberley Farm sluice | IDB | Yes | TQ0269413868 |
| 220447 | Penstock - control gate x 2 | Northbrook sluice | IDB | Yes | TQ0531017502 |
| 315077 | Outfall pipe from IDB pumping station | Houghton pumping station pumped outfall | IDB | Yes | TQ0231711701 |
| 411747 | Screen (Hardham pumping station) | Hardham pumping station screen | IDB | No | TQ0447816856 |
| 241495 | Penstock - control gate | Low Brook sluice | IDB | Yes | TQ0258614328 |
| 223650 | Penstock - control gate | IDB | Yes | TQ0305713680 | |
| 503980 | Penstock - control gate | Stopham (Ashurst sluice) | IDB | Yes | TQ0318018109 |
| 504273 | Penstock - control gate | Amberley Castle sluice | IDB | Yes | TQ0186313161 |
| 504291 | Penstock - control gate | Limekiln sluice | IDB | Yes | TQ0217611372 |
| 504295 | Penstock - control gate | Ashtree sluice (North Stoke) | IDB | Yes | TQ0159010340 |
| 504314 | Penstock - control gate | South Stoke sluice | IDB | Yes | TQ0279610153 |
| 504682 | Penstock - control gate | Hospital sluice / Offham island | IDB | Yes | TQ0308508501 |
| 504686 | Penstock - control gate | Boundary sluice | IDB | Yes | TQ0363908324 |
| 504691 | Penstock - control gate | Dawes sluice | IDB | Yes | TQ0262306844 |
| 504694 | Penstock - control gate | Ford Church sluice | IDB | Yes | TQ0052003221 |
3. Asset inspections
3.1 Asset structures
| Asset number | Asset type | Location | Maintained by | Asset condition inspection | Public safety risk assessment | National Grid reference |
|---|---|---|---|---|---|---|
| 271090 | In Channel stoplogs | Station ditch | Internal drainage board (IDB) | No | Yes | TQ0181406056 |
| 271093 | Penstock - control gate | Hoopers / Station sitch sluice | IDB | No | Yes | TQ0123605648 |
| 241451 | Penstock - control gate | Offham island sluice | IDB | No | Yes | TQ0356708379 |
| 267176 | Penstock - control gate | Amberley lower sluice | IDB | No | Yes | TQ0217612141 |
| 267177 | In Channel stoplogs - boards only | Fletchers sluice | IDB | No | Yes | TQ0178212502 |
| 271127 | In Channel stoplogs | Hardham Mill siphon boards | IDB | No | Yes | TQ0311117729 |
| 241498 | Penstock - control gate | Wild Brook (lower) | IDB | No | Yes | TQ0308114152 |
| 241493 | In Channel stoplogs | Sussex Wildlife Trust Penstock off north side track | IDB | No | Yes | TQ0305214559 |
| 271124 | Penstock - control gate | Hardham Church Farm ditch | IDB | No | Yes | TQ0445217087 |
| 411925 | Screen | Houghton pumping station screen | IDB | No | Yes | TQ0231311710 |
| 242782 | Penstock - control gate | Coldwaltham sluice | IDB | No | Yes | TQ0257315694 |
| 270387 | In Channel stoplogs - boards only | North Stoke sluice | IDB | No | Yes | TQ0249410102 |
| 188705 | Penstock - control gate | Upper Tortorting Penstock | IDB | No | Yes | TQ0105805619 |
| 188708 | In Channel stoplogs - boards only | Upper Tortington ditch | IDB | No | Yes | TQ0113406201 |
| 317401 | Screen | Spring ditch weedscreen | IDB (West Sussex County Council) | No | Yes | TQ0134106929 |
| 270507 | In Channel stoplogs | Spring ditch, Park Bottom | IDB | No | Yes | TQ0122407157 |
| 242226 | In Channel stoplogs - boards only | Climping Church ditch | IDB | No | Yes | TQ0080302735 |
| 275800 | Fixed Weir | Ford Church ditch | IDB | No | Yes | TQ0049103340 |
| 271822 | In Channel stoplogs | Northbrook ditch | IDB | No | Yes | TQ0544817497 |
| 188709 | In Channel stoplogs - boards only | Eversheds sluice | IDB | No | Yes | TQ0119006331 |
| 188712 | Penstock - control gate | Spring ditch sluice | IDB | No | Yes | TQ0136606724 |
| 443125 | In Channel stoplogs | Castle ditch sluice | IDB | No | Yes | TQ0222006992 |
| 241836 | Penstock - control gate | Mill Stream upper sluice Number 2 | IDB | No | Yes | TQ0226607714 |
| 277330 | In Channel stoplogs - boards only | Swanbourne Lodge ditch outfall | IDB | No | Yes | TQ0245308338 |
| 188103 | Penstock - control gate | Peppering sluice | IDB | No | Yes | TQ0327609315 |
| 188105 | Penstock - control gate | Alders sluice | IDB | No | No | TQ0316509779 |
| 240474 | Penstock - control gate | Brickyards sluice | IDB | No | Yes | TQ0281607658 |
| 267144 | Penstock - control gate | Danbridge sluice / Brookfield Penstock | IDB | No | Yes | TQ0126905341 |
| 241659 | Penstock - control gate | Crooked ditch sluice | IDB | No | Yes | TQ0098304579 |
| 277696 | Penstock - control gate | Foxes Oven sluice | IDB | No | Yes | TQ0307609063 |
| 275464 | Weir and flap valve | Houghton pump | IDB | No | Yes | TQ0230511726 |
| 188106 | In Channel stoplogs | Horseshoe lower sluice | IDB | No | Yes | TQ0333710057 |
| 267163 | Unflapped outfall | Peppering West outfall | IDB | No | Yes | TQ0273409626 |
| 242763 | In Channel stoplogs - boards only | Brickyards sluice | IDB | No | Yes | TQ0336008168 |
| 444416 | Flapped Outfall | Greatham Bridge ditch outfall | IDB | No | Yes | TQ0290116251 |
| 271133 | Penstock - control gate | Hardham Priory ditch sluice | IDB | No | Yes | TQ0319516355 |
| 239784 | Screen (Greatham pumping station) | Greatham pumping station screen | IDB | No | Yes | TQ0371016503 |
| 239786 | Screen (Greatham pumping station) | Greatham pumping station screen | IDB | No | Yes | TQ0369516499 |
| 276594 | Penstock - control gate | Greatham pumping station sluice | IDB | No | Yes | TQ0371916488 |
| 276597 | Penstock - control gate | Spinney sluice | IDB | No | Yes | TQ0455116620 |
| 238191 | Penstock - control gate | Wide Meade ditch sluice | IDB | No | Yes | TQ0195813717 |
| 255858 | Penstock - control gate | Timberley Farm sluice | IDB | No | Yes | TQ0269413868 |
| 220447 | Penstock - control gate x 2 | Northbrook sluice | IDB | No | Yes | TQ0531017502 |
| 315077 | Outfall pipe from IDB pumping station | Houghton pumping station pumped outfall | IDB | No | Yes | TQ0231711701 |
| 411747 | Screen (Hardham pumping station) | Hardham pumping station screen | IDB | No | Yes | TQ0447816856 |
| 271818 | Penstock - control gate | Wiggonholt sluice | IDB | No | No | TQ0473116278 |
| 188711 | Two service pipes | Tortington upper ditch | IDB | No | Yes | TQ0123906481 |
| 241495 | Penstock - control gate | Low Brook sluice | IDB | No | Yes | TQ0258614328 |
| 238550 | Unflapped outfall | Low Brook ditch | IDB | No | Yes | TQ0272514590 |
| 223646 | Weir and flap valve | Middle gutter by track | IDB | No | Yes | TQ0301113675 |
| 223647 | In Channel stoplogs | Middle gutter downstream of track | IDB | No | Yes | TQ0303713678 |
| 223650 | Penstock - control gate | Middle gutter Penstock | IDB | No | Yes | TQ0305713680 |
| 271127 | In Channel stoplogs | Hardham Trunk syphon | IDB | No | Yes | TQ0311317733 |
| 503980 | Penstock - control gate | Stopham (Ashurst sluice) | IDB | No | Yes | TQ0318018109 |
| 504273 | Penstock - control gate | Amberley Castle sluice | IDB | No | Yes | TQ0186313161 |
| 504291 | Penstock - control gate | Limekiln sluice | IDB | No | Yes | TQ0217611372 |
| 504295 | Penstock - control gate | Ashtree sluice (North Stoke) | IDB | No | Yes | TQ0159010340 |
| 504314 | Penstock - control gate | South Stoke Penstock | IDB | No | Yes | TQ0279610153 |
| 504682 | Penstock - control gate | Hospital sluice / Offham island | IDB | No | Yes | TQ0308508501 |
| 504686 | Penstock - control gate | Dawes upper sluice | IDB | No | Yes | TQ0363908324 |
| 504691 | Penstock - control gate | Dawes sluice | IDB | No | Yes | TQ0262306844 |
| 504694 | Penstock - control gate | Ford Church sluice | IDB | No | Yes | TQ0052003221 |
3.2 Internal drainage board pumping stations
| Asset number | Asset type | Location | Maintained by | Asset condition inspection | Public safety risk assessment | Mechanical and electrical planned preventative maintenance |
|---|---|---|---|---|---|---|
| 239785 | Pump house | Greatham pumping station | Internal drainage board (IDB) | Yes | Yes | Yes |
| 271118 | Pump house | Hardham pumping station | IDB | Yes | Yes | Yes |
| 275461 | Pump house | Houghton pumping station | IDB | Yes | Yes | No |
3.3 Internal drainage board bridges
| Asset number | Asset type | Location | Maintained by | Asset condition inspection | Public safety risk assessment |
|---|---|---|---|---|---|
| 188706 | Bridges | Brooklands, Arundel | Internal drainage board (IDB) | No | Yes |
| 242230 | Bridges | Watermeadows, Arundel | IDB | No | Yes |
| 484024 | Bridges | Burpham, Arundel | IDB | No | Yes |
| 484031 | Bridges | Burpham, Arundel | IDB | No | Yes |
| 241499 | Bridges | Amberley Wild Brooks (North) Pulborough | IDB | No | Yes |
| 223648 | Bridges | Amberley Wild Brooks (South) Pulborough | IDB | No | Yes |