Headwall definition

Headwall means steep, concave slopes that can concentrate subsurface water, which can lead to increased landslide susceptibility. Headwalls are typically located at the head of stream channels, draws, or swales. Headwalls have slope gradients of 65 percent or greater in the Tyee Core Area and 70 percent or greater in the rest of the state, as measured in the axis of the headwall. Landslides that occur in headwalls are more likely to initiate channelized debris flows that can travel down streams (also known as debris torrents) than landslides that occur in other areas of the slope.

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Headwall means a steep slope at the head or upper end of a land slump block or unstable landform.

Headwall means a vertical wall at the end of a culvert used to prevent earth from spilling into the ditch;

Examples of Headwall in a sentence

• Low spot allows for water to continue Headwall down ditch in case of plugged culvert Subgrade Ditch Culvert Headwall Culvert 30° Skew ENERGY DISSIPATORS Aggregate Filled ▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ to be constructed Dissipator Specifications: of material that will resist Depth: 1 culvert diameter erosion.

• Code Value Description AGGREGATE Granular Base CLEAR&GRUB Clear and Grub, Removal DEMO Building demolition, other DESIGN Design, studies, RFC package deliverables DRAINAGE Pipe, Box Culvert, Headwall EXCAVATION Cut, fill, excavate FLATWORK Curb, gutter, sidewalks LANDSCAPE Topsoil, mulch, seeding MOT Maintenance of Traffic PAVING Concrete, Asphalt, etc.

• HEADWALLS Low spot allows for water to continue Headwall down ditch in case of plugged culvert Subgrade ENERGY DISSIPATORS Ditch Culvert 2 Culvert Diameters Aggregate Filled 2 Culvert Diameters Headwall Culvert Headwalls to be constructed Dissipator Specifications: of material that will resist Depth: 1 culvert diameter erosion.

• Low spot allows for water to continue Headwall down ditch in case of plugged culvert Subgrade Ditch Culvert Headwall Culvert 30° Skew ENERGY DISSIPATORS Aggregate Filled ▇▇▇▇▇▇▇▇▇ to be constructed Dissipator Specifications: of material that will resist Depth: 1 culvert diameter erosion.

• Bridge Class Cross-Culvert Extension and Headwall – The existing box culverts below the SH 99 main lanes and ramp will be extended to outside of the proposed pavement limits.

• HEADWALLS Low spot allows for water to cont Headwall down ditch in case of plugged Subgra ENERGY DISSIPATORS Ditch ▇▇▇▇▇▇ 2 Culvert Diameters Aggregate Filled Headwal ▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇ to be constructed Dissipator Specifications: of material that will resist Depth: 1 culvert diameter erosion.

• Pre-Cast L-Shaped Reinforced Concrete Headwall, including removal and disposal of existing headwall (if applicable) d.

• HEADWALLS Low spot allows for water to continue ENERGY DISSIPATORS Headwall down ditch in case of plugged culvert Subgrade 2 Culvert Diameters Aggregate Filled DRAFT Ditch Culvert 2 Culvert Diameters Headwall Culvert Headwalls to be constructed Dissipator Specifications: of material that will resist Depth: 1 culvert diameter erosion.

• Contract Culvert Number Top Surface type Station Location Culvert (mm) In-Field Culvert Measurement (mm) Culvert Type Existing Headwall Culvert Condition Clean Out Required Culvert Inspection and Evaluation Recommendations Structural Repair Work Required 1 Gravel 0+▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ 400 CSP NO Generally in good condition, no signs of corrosion no Culvert is in good condition.

• HEADWALLS Low spot allows for water to continue ENERGY DISSIPATORS Headwall down ditch in case of plugged culvert Subgrade 2 Culvert Diameters Aggregate Filled Ditch Culvert 2 Culvert Diameters Headwall Culvert Headwalls to be constructed Dissipator Specifications: of material that will resist Depth: 1 culvert diameter erosion.

More Definitions of Headwall

Headwall means a retaining wall at either end of a culvert to hold back earth around the culvert, and shall be constructed of concrete in accordance with Ontario Provincial Standard drawings, or prefabricated headwall stone to the satisfaction of the Town.

Headwall means steep, concave slopes that can concentrate subsurface water, which can lead to increased landslide susceptibility. Headwalls are typically located at the head of stream channels, draws, or swales.

Headwall means a steep slope at the head or upper end of a land slump block or unstable landform. (See Diagrams 20 and 21)