Missouri Department of Transportation (MoDOT) · Missouri Standard Specifications for Highway Construction
Section 1068 — Trench Drains
Missouri Missouri Standard Specifications for Highway Construction, Section 1068. Full text, cross-references and related pay items on BuildSpec.
1068 TRENCH DRAINS 1068.1 Scope. This specification covers trench drains used in median and shoulder drainage systems. 1068.2 Acceptance. All material shall be obtained from a source identified on the Qualified List (QL) designated for this specification. 1068.3 Materials. 1068.3.1 Drain grates shall meet AASHTO M 306 requirements for proof-load testing. 1068.3.2 The drain grate inflow area shall be a minimum of 0.27 ft2/lf. Drain grate retaining devices shall not obstruct hydraulic flow in the channel. 1068.3.3 The drain grate retaining device shall withstand, without maintenance, repetitive…
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