Minnesota Department of Transportation (MnDOT) · 2025 Standard Specifications for Construction
Section 3399 — Flap Gates
Minnesota 2025 Standard Specifications for Construction, Section 3399. Full text, cross-references and related pay items on BuildSpec.
3399 FLAP GATES 3399.1 SCOPE Provide flap-type drainage control gates for direct attachment to the outlet ends of C ulvert and sewer pipe as shown on the Plans or required by the Special Provisions. If shown on the Plans or required by the Special Provisions, provide gates with attachment to the outlet Structure. 3399.2 REQUIREMENTS A Base Metal Provide frame, flap, flange, hinge bars, and other basic components of the gate assembly made of cast iron, cast steel, structural steel, or other metals approved by the Engineer . Provide hinge bushings and pins made of non-corrosive metal approved…
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