Each PNP MultiFunction Boom Designs include a review of:
The operational objectives of each boom. These range from:
- Demarcation & Public Safety Applications: A boom for a forebay application may require self-rescue capabilities, signs, or lights. Boom deployed in dangerous waterways or tailrace locations will require the ability to withstand high loads, fast and turbulent water. An all-season boom design will increase the efficiency of public safety efforts and reduce risks to both operators and the public.
- Ice and Debris Conditions: Ice and debris can pass over, under, or through the gaps (of booms built in sections). A contiguous boom, with each section joining the next, without gaps or spaces, can be designed to guide debris or exclude debris and ice, reducing operations and maintenance costs associated with debris removal and disposal, and reduce head loss and unplanned shutdowns.
- Dam Safety Considerations: In the event of PMF conditions, a boom can be the last resort to improve dam safety, preventing debris damage to spillways.
- Security: Practically unsinkable, MultiFunction Booms can be be used to prevent unauthorized access in the tailrace of forebay, with diameters large enough to prevent jet skiers from passing over the top, or with fences to prevent boats from passing through.
- Fish and Environmental Applications: MultiFunction Booms can be used in a variety of ways to assist with fish and environmental applications including use as flotation for fish barrier nets, components for fish guidance structures, and support for temperature and algae curtains.
Other common operations considerations are:
- Will a boat gate be required? If so, can you describe the type of boat that require passage and frequency?
- What is the duration of the installation? Will this be an all-season boom or a seasonal installation?
The Site Conditions, considerations include:
- Failure: If your boom or barrier is required to replace an existing structure, we ask "Why did last one fail?" Often the cause is connections between boom sections have failed due to poor design or the pontoon has ruptured. Sizing the boom to fit your site conditions is critical.
- Velocity: The surface water velocity at the barrier location will affect both the hydrodynamics of the boom and, when debris guidance is required, the efficiency of the boom. While boom skirts can be designed with different materials to address different water velocities and debris loads, understanding velocity is often very important.
- Pool Fluctuation: Booms should have the ability to adjust to, and perform at, all levels of pool fluctuation. When resting on the shore, the boom material should resist puncture or abrasion. The boom sections should match the contour of the shoreline and boom strength should allow installations on steep shorelines.
- Wind Speed and Wave Height: Wind and waves can be used to assist guidance and exclusion or can be a frustration adding loads and stress.
- Ice and Debris, Characteristics, and Behavior: Whether the operational design of the boom is for pubic safety, debris guidance, or security, understanding debris, and ice conditions will be a critical component of boom design leading to screen options, boom design and debris management methodology.
- Anchors: PNP will work closely with you review the land, dam, and in-water anchor points and design.
The cost components: Reduce costs, increase efficiency, enhance lifecycle costs.
- Reduce Cost: Typical operations and maintenance costs can be divided between
- The cost of repairs, procurement, and replacement of the booms and boom connections
- The labor costs and risks associated with debris collection and removal
- The cost of debris disposal
- The cost of repair to the dam components
- The cost of loss generation as a result of debris removal
- Debris Guidance Efficiency
- This can be described as the percentage of total debris passing a boom and the percentage of debris guided or excluded by the boom itself.
- This is a component of the design of the boom, the skirt below it, and the orientation of the boom to the flow, inconsideration of the debris, flotsam or jetsam in the waterbody.
- The goal of increasing guidance efficiency is the reduction of generation loss
- Enhance Lifecycle Costs
- MultiFunction Booms provide low-maintenance, high efficiency and 50-year service life to enhance lifecycle cost. The 10-year watertight warranty is longer than many plastic booms last. These are corrosion-free, rot-resistant & UV-stable and capable of withstanding temperatures to -96C below freezing. Because they are suitable for grounding on a regular basis and have few, if any, moving parts they have few requirements for maintenance and repair. The combination of these features and benefits enhances your lifecycle costs and changes the financial calculation of the boom from an operational expense to capital asset.