1. All 6" to 10" pipes must conform to AASHTO-M-252-92I Interim Specifications for Corrugated Polyethylene Drainage Tubing. All solid tubing shall be Type C with Class 2 perforations. All perforated tubing shall be Type CP with Class 2 perforations. All 12" - 24" Pipe must conform with AASHTO-M-294-92I Specifications for Corrugated Polyethylene Pipe 12" - 36" diameter. All solid tubing shall be Type C with Class 2 perforation. All perforated tubing shall be type CP with Class 2 perforations. If standards have been updated, the most recent standard as accepted by MassDOT shall be adhered to. 2. Culvert pipe must be compatible with Advanced Drainage Systems (ADS) culvert pipe corrugation. 3. All material must be new and delivered within 30 days from the date of the purchase orders unless prior arrangements are made. 1. All pipes 10" in diameter and necessary couplings and fittings must conform to AASHTO-M-252-92I "Interim Specifications for Corrugated Polyethylene Drainage Tubing." All solid pipe shall be Type S. All perforated pipe shall be Type SP with Class 2 perforations. 2. All pipes 12" - 48" in diameter and necessary couplings and fittings must conform to AASHTO-M294-92I "Interim Specifications for Corrugated Polyethylene Pipe, 12 to 48 inch diameter." All solid pipe shall be Type S. All perforated pipe shall be Type SP with Class 2 perforations. If standards have been updated, the most recent standard as accepted by MassDOT shall be adhered to. 3. New for FY2026 – Addition of Double Wall Solid Elbow Pipe to this category. 4. Culvert pipe must be compatible with Advanced Drainage Systems culvert pipe corrugation. 5. All material must be new and delivered within 30 days from the date of the purchase orders unless prior arrangements are made.
