Maryland Department of Transportation — State Highway Administration (MDOT SHA) · Standard Specifications for Construction and Materials
Section 306 — Underdrains, Subgrade Drains, and Spring Control
Maryland Standard Specifications for Construction and Materials, Section 306. Full text, cross-references and related pay items on BuildSpec.
306 — UNDERDRAINS, SUBGRADE DRAINS, AND SPRING CONTROL 2026 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 300 DRAINAGE SECTION 306 — UNDERDRAINS, SUBGRADE DRAINS, AND SPRING CONTROL 306.01 DESCRIPTION Construct underdrains, subgrade drains, underdrain for spring control, underdrain pipe outlets, and blind drains using pipe, geotextile, and granular material. Clean existing underdrain outlets. 306.02 MATERIALS No. 57 Aggregate 901.01 Portland Cement Concrete 902.10, Mix No. 2 Pipe Section 905 Geotextile, Class as specified Section 919 Securing Pins or Staples 919.03 Flexible…
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