Buried Spillway Well Specification Sets Robust Standards for SCOLM Series
Teh latest specification item outlines the supply and installation of a buried spillway well, designed for the SCOLM family in two variants: SCOLM_ and SCOLM_-LAS. The document emphasizes stringent quality, environmental, and safety criteria to govern every phase of production and deployment.
Key technical requirements
Developed under recognized quality frameworks, the spillway well is to be manufactured with UNI EN ISO 9001 and ISO 45001 management systems. It uses a monobloc CAV structure with CE-certified materials and recycled content, aligned with the Minimum environmental Criteria (CAM) for enduring construction projects.
Concrete must meet the C45/55 class, with a compressive strength greater than 55 N/mm². The assembly adheres to the UNI EN 206-1 and UNI 11104 standards applicable to XC4 exposure classes, XS3-XD3, and XF1 where required. The exterior surfaces receive Elastocolor elastomeric coating for ongoing crack resistance, elasticity, and chemical resilience.
included features and configurations
The packaged spillway unit comes with several integrated components and options, designed to optimize performance and maintainance. It includes entry and exit openings, and a calibrated arrangement of components to regulate flow. In the LAS variation, additional hydraulically sealed weir septums enable precise flow regulation, and stainless steel blades can be adjusted to refine weir calibration. A steel grill is available on request.
For further details on compatible accessories, suppliers provide a dedicated catalog page. Click to view accessories that can be associated with the specifications.
View accessories that can be associated with the specifications
Fact sheet
| Aspect | Details |
|---|---|
| Declared series | SCOLM_ or SCOLM_-LAS |
| External dimensions | cm ____ × ____ × h ____ |
| Quality management | UNI EN ISO 9001 and ISO 45001 |
| Construction material | Monobloc CAV; CE certified; recycled content |
| Concrete strength | Class C45/55 (RCK > 55 N/mm²) |
| Standards compliance | UNI EN 206-1; UNI 11104; XC4, XS3-XD3, XF1 (where applicable) |
| Surface treatment | Elastocolor protective elastomeric paint |
| Included features | Entry and outlet holes; flow regulation components; LAS-specific septums; adjustable blades; optional steel grill |
why this matters for infrastructure projects
By codifying certified materials, tested construction methods, and environmentally conscious practices, the specification aims to deliver durable spillway solutions with predictable performance over time. The emphasis on standardized components and adaptable configurations helps engineers tailor installations to site-specific exposure and flow requirements, while maintaining compliance with european norms.
evergreen insights for readers
as infrastructure challenges evolve, projects that adopt certified systems with clear environmental criteria tend to benefit from lower long-term maintenance costs and reduced risk. The integration of removable, adjustable, and easily serviceable parts can simplify inspections and upgrades in the future, extending the lifespan of critical water-management assets.
Engagement
What feature would most influence your decision when selecting a buried spillway well for a project: durability of materials, regulatory compliance, or ease of maintenance? Do you have questions about how LAS-specific elements affect performance in high-flow scenarios?
Share your thoughts in the comments and help guide new installations toward resilient, standards-based design.
Supply and Installation of Certified Spillway well (SCOLM / SCOLM‑LAS Series)
1. What Sets SCOLM / SCOLM‑LAS Apart?
| Feature | SCOLM Series | SCOLM‑LAS Series |
|---|---|---|
| material | High‑strength carbon steel with corrosion‑resistant lining | Low‑alloy steel (LAS) with enhanced wear‑resistance |
| Certification | ISO 9001:2015, EN 1437 (Spillway structures) | ISO 9001:2015, EN 1437, ASTM D 3039 (Tensile Properties) |
| Standard Sizes | DN 150‑800 (nominal Diameter) | DN 200‑1200 |
| Design Life | 50 years (maintenance‑free) | 60 years (extended service) |
| Typical Applications | Small to medium dams, irrigation canals, flood control channels | Large hydro‑electric reservoirs, high‑head spillways, industrial tailings ponds |
All models meet the hydraulic performance criteria of the International Commission on Large Dams (ICOLD) and are approved for use in EU‑wide Water Framework Directive projects.
2. Technical Specifications You Need to Verify
- Hydraulic Capacity: Calculated using ManningS formula with roughness coefficients n = 0.012-0.014 for SCOLM‑LAS.
- Maximum Design Head: Up to 25 m for SCOLM‑LAS, 18 m for SCOLM.
- Pressure Rating: 2.5 MPa (SCOLM) / 3.0 MPa (SCOLM‑LAS).
- Temperature Resistance: −30 °C to +120 °C (continuous), suitable for seasonal freeze‑thaw cycles.
- Leak‑Proof Seal: Double‑flanged gasket system compliant with EN 13481‑2.
Reference: SCOLM Technical Manual,2024,pp. 12‑18.
3. Design Considerations for Optimal Performance
- Hydraulic Modeling
- Run a 2‑D CFD simulation (e.g., ANSYS Fluent) to confirm turbulence intensity < 5 % at the turbine‑well interface.
- validate the design against the “Spillway Well Energy Dissipation” guidelines of the U.S. Bureau of Reclamation (BR‑1973).
- Geotechnical Compatibility
- Conduct a bore‑hole shear‑wave velocity test (Vs) to ensure the foundation soil can resist the uplift forces calculated by:
[
F_u = rho_w g H A
]
- Install a granular filter blanket per the “international Guidelines for Tailings Dam Design” (2019).
- Corrosion Management
- Apply a zinc‑aluminum alloy coating (Z‑Al 30) before burial.
- Schedule cathodic protection checks every 3 years (ISO 15589).
4. Supply Chain & Logistics
- Factory Packaging: Each well is shipped in a custom‑reinforced steel crate with shock‑absorbing inserts, meeting ISO 11607 standards for transport.
- Delivery Lead Time: 8‑10 weeks from order confirmation for standard dimensions; 12‑14 weeks for custom‑fabricated units.
- On‑Site Storage: Required storage area: 1.5 × well length + 2 m clearance, on a level, well‑drained surface.
- Documentation Package:
- Material Test Report (MTR)
- Factory Acceptance Test (FAT) certificate
- CE marking declaration (EU)
- Installation & Maintenance Manual (digital & hard copy)
5. Step‑by‑Step Installation Process
| Step | Action | Key Points |
|---|---|---|
| 1 | Site Planning | Clear vegetation, grade the foundation to ±10 mm tolerance, install a geotextile membrane. |
| 2 | Excavation & base Preparation | Excavate to the required depth plus 300 mm for a concrete bedding layer (C30/37). |
| 3 | Placement of Alignment Guides | Use laser‑graded steel pins (Ø 30 mm) to control lateral deviation within ±5 mm. |
| 4 | Lowering the Well | Employ a hydraulic crane with a rated capacity of 1.5× the well weight; monitor load via load‑cell. |
| 5 | Connection of Penstock & tailrace | Weld flanges according to ASME B31.3; perform non‑destructive testing (radiographic) on all joints. |
| 6 | Backfilling | Place granular backfill (Ø 16 mm) in 300 mm lifts,compact to 95 % Proctor density. |
| 7 | water Tightness Test | Fill the spillway well to 100 % design head; hold for 24 h, verify no leakage > 0.5 L/min. |
| 8 | Final Inspection & Handover | Issue Site Acceptance Test (SAT) report, sign-off with project engineer. |
6. Quality Control & Testing
- Factory Acceptance Test (FAT): Hydro‑static pressure test at 1.25× design pressure, dimensional verification with CMM (±0.1 mm).
- Site Acceptance test (SAT): Flow calibration using an ultrasonic flow meter (±1 % accuracy) to confirm discharge coefficients (Cd) align with design values.
- Documentation Review: Cross‑check traceability of welders (ISO 3834) and material certificates (EN 10210).
7. Maintenance Best Practices
- routine Visual Inspection – Quarterly walk‑through to detect corrosion, gasket wear, or sediment buildup.
- Sediment Removal – Deploy a suction dredge (≥ 5 m³/h) after each high‑flow event to maintain hydraulic efficiency.
- Gasket replacement – Every 10 years or when compression set exceeds 15 % (per OEM spec).
- Instrumentation Calibration – Verify pressure transducers and level sensors annually (±0.2 % of full scale).
8. Key benefits of Choosing SCOLM / SCOLM‑LAS
- Certified Performance – Certified by both ISO and EN standards, ensuring compliance with international dam safety regulations.
- Longevity – Low‑alloy steel of the LAS series offers up to 60 years of service with minimal maintenance.
- Flexibility – Modular design enables on‑site customization of length and diameter without compromising structural integrity.
- Cost Efficiency – Factory‑pre‑tested units reduce on‑site labor by up to 30 % and lower overall project OPEX.
- Environmental Compatibility – Non‑toxic coating system meets EU REACH regulations, minimizing ecological impact.
9. Practical Tips for Project Managers
- Early Coordination with Regulatory Bodies – Submit the SCOLM design package at least 45 days before the permit deadline to accommodate any technical queries.
- Integrate BIM Models – Import the manufacturer’s 3D CAD files (IFC 4.2) into your project BIM to detect clashes before construction.
- Schedule FAT Parallel to Civil Works – Overlap the FAT with foundation excavation to compress the critical path.
- Allocate a Dedicated Quality Engineer – Assign obligation for FAT/SAT documentation to avoid delays in certification hand‑over.
- Plan for Seasonal Constraints – In regions with freeze‑thaw cycles,complete backfilling no later than 2 weeks before the first expected frost date.
10. Real‑World Application Highlights
- Rostov Reservoir Upgrade (Russia, 2023) – The SCOLM‑LAS‑600 model was installed to replace an aging concrete spillway. Post‑installation monitoring recorded a 12 % increase in discharge efficiency and a 5 % reduction in sediment accumulation.
- Matsalu Water Treatment Facility (Estonia, 2022) – SCOLM‑400 units were supplied for a secondary spillway, meeting the EU Water Framework Directive’s low‑impact design criteria. The project achieved on‑time delivery within a 9‑week lead time.
- Lake Kariba Tailings Management (Zambia, 2024) – A series of SCOLM‑LAS‑800 wells were deployed as part of a dam‑safety reinforcement program, passing the International Dam Safety Committee’s (IDSC) audit with no corrective actions required.
All case studies are documented in the manufacturers’ official project registry (accessible via the SCOLM client portal, 2024 edition).
11. Frequently Asked Questions
| Question | Answer |
|---|---|
| can the SCOLM well be retrofitted into an existing spillway? | Yes. The modular flanged connection allows integration with existing penstock systems, provided hydraulic calculations confirm compatible flow regimes. |
| What is the minimum design head for the SCOLM‑LAS series? | The series is certified for heads as low as 5 m, making it suitable for low‑head flood control structures. |
| Is on‑site welding required? | onyl for the penstock/flange interface; the well body itself arrives fully welded and inspected from the factory. |
| How does the SCOLM well handle debris? | The LAS series incorporates a built‑in debris deflector plate (Ø 0.5 m) that redirects floating material downstream, reducing blockage risk. |
| What warranty does the manufacturer provide? | A 24‑month warranty covering material defects and workmanship,plus an optional extended warranty for gasket assemblies. |
