Policy paper
River Arun: internal drainage district planned maintenance programme 2025 to 2026
Updated 30 September 2025
Applies to England
漏 Crown copyright 2025
This publication is licensed under the terms of the Open Government Licence v3.0 伊人直播. To view this licence, visit or write to the Information Policy Team, The National Archives, Kew, London TW9 4DU, or email: psi@nationalarchives.gov.uk.
Where we have identified any third party copyright information you will need to obtain permission from the copyright holders concerned.
This publication is available at /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听
| Parish Council | Watercourse / location | Maintained length metres (m) |
|---|---|---|
| Parham | M146 Northbrook ditch - Internal drainage board (IDB) ( Total Length = 1760m) | 听 |
| 听 | Section 1/a | 930 |
| 听 | Section 2/b | 830 |
| 听 | M147 Wiggonholt Stream -鈥疘DB鈥�( Total Length = 1820m) | 听 |
| 听 | Section 1/a | 1820 |
| Amberley | M148 Smith鈥檚 ditch -鈥疘DB鈥�( Total Length = 2090m) | 480 |
| 听 | Section 2/b | 1130 |
| 听 | Section 3/c | 480 |
| 听 | M149 Low Brook ditch West -鈥疘DB鈥�( Total Length = 1270m) | 听 |
| 听 | Section 1/a | 720 |
| 听 | Section 2/b | 550 |
| 听 | M150 Low Brook ditch -鈥疘DB鈥�( Total Length = 2070m) | 听 |
| 听 | Section 1/a | 460 |
| 听 | Section 2/b | 450 |
| 听 | Section 3/c | 620 |
| 听 | Section 4/d | 340 |
| 听 | Section 5/e | 200 |
| 听 | M151 Pound Piece ditch -鈥疘DB鈥�( Total Length = 900m) | 听 |
| 听 | Section 1/a | 900 |
| 听 | M152 Smooth ditch -鈥疘DB鈥�( Total Length = 580m) | 580 |
| 听 | M153 Middle Gutter ditch -鈥疘DB鈥�( Total Length = 2100m) | 1710 |
| 听 | Section 2/b | 390 |
2. Proposed Maintenance Programme 2025 to 2026听
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 | 听 | IDB | Yes | TQ0445217087 |
| 188705 | Penstock - control gate | Tortington upper Penstock | IDB | Yes | TQ0105805619 |
| 317401 | Screen | Spring ditch weedscreen | IDB鈥�(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 | 听 | 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鈥疘DB鈥痯umping 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 | 听 | 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听
3.1 鈥疉sset structures听
| 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鈥�(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鈥疘DB鈥痯umping 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 听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 听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 |