Polymeric Corrugated Metal Pipe (PCMP) Hello, thank you all for taking time from your busy schedule and Jim thank you for putting on this meeting. My name is Dana Hayek and I work for Contech Engineered Solutions, as the Alaska Sales Engineer. How many people have heard of or worked with Contech/ its product lines prior to today? Our focus today’s meeting will be Polymeric Corrugated Metal Pipe. Polymeric Corrugated Metal Pipe (PCMP)

Contech Engineered Site Solutions Bridges, Drainage, Stormwater Management, Wastewater Treatment, Erosion Control, Structures, Retaining Walls, Roadway & Earth Stabilization

Polymer TRENCHCOAT ® protective film bonds to galvanized steel both chemically and physically TRENCHCOAT Heavy Gauge Polymer Film (10 mil) It features a 10 mil polymer film applied to each side of a galvanized steel coil AFTER the galv process. Zinc Steel Alloy Layers Steel

Polymer CSP coated with TRENCHCOAT offers: Excellent Adhesion Chemical resistance to Acids Alkalis Salts Abrasion resistance Weatherability Water barrier imperviousness It has been around in its present form since the late 70’s. It’s been highly tested and field proven. Not to the extent of AL-T2, but close. (review slide)

Environmental Limits for 50 Year Service Life Polymer Environmental Limits for 50 Year Service Life pH 3.0 - 12.0 Resistivity > 250 ohm-cm Abrasion: Good in levels 1 - 3; use invert treatments in level 4 (review slide) The resistivity limit should be shown as 250 ohm-cm (for 50-year life).

FHWA abrasion guidelines: Abrasion is a function of flow velocity and bed load. In the absence of bed load, abrasion is not a factor. FHWA abrasion guidelines: Abrasion Level Abrasion Condition Bed Load Flow Velocity (fps) Level 1 Non – Abrasive None Low Level 2 Low Abrasive Minor (sand) < 5 Level 3 Moderate Abrasive Moderate (sand & gravel) 5 - 15 Level 4 Severe Abrasive Heavy (sand, gravel & rock) > 15 FHWA has provided guidance with abrasion. They relate it to the type of objects moving through (bed load) and the velocity of flow. Level 3 and 4 abrasion, even in a neutral environment, can wreak havoc on the invert, which can greatly reduce service life.

NCSPA Service Life Estimate – 16 ga Polymer NCSPA Service Life Estimate – 16 ga Service Life pH Levels Resistivity 100 years 5 - 9 > 1500 ohm.cm (review slide) 75 years 4 - 9 > 300 ohm.cm

Written by: Elzly Technology Corportation LONG-TERM FIELD INVESTIGATION OF POLYMER COATED CORRUGATED STEEL PIPE (2012) The data continues to support guidance for a polymer coating “add-on” life of 80 years. The polymer coating continues to protect the galvanized steel pipe in severe environmental and abrasion conditions beyond the design conditions. In all of the pipes, less than 5% of the polymer had coating delamination. Written by: Elzly Technology Corportation Prepared for: NCSPA

CULVERT STORM DRAIN DETENTION SYSTEM Uses:

Polymeric Ultra-Flo 18” – 102” Dia. “n” = 0.012

PROJECTS Contractor Location Year Details Frawner Corp Fort Richardson Sewer Upgrade 2012 48" (1480 LF) & 42" (3,940 LF)   McKenna Brothers Glenn Hwy/Eagle River Subdivision 2011 Pipe Arch 35" x 24" (300 LF) & 49" x 33" (380 LF) GMC Contractors 54" (700 LF) & Pipe Arch 49" x 33" (100 LF) Central Environmental Verizon MSC Center/Anchorage Pipe Arch 57" x 38 (630 LF) & 42" x 29" (740 LF) MOA Street Main 2010 12" (120 LF) Bristol Construction Pt Mackenzie 24" (300) 36" (120) & 48" (100) QAP Huffman Rd Poly Ultra Flo - 54" Anchorage Water 2009 Pipe Arch 35" x 24" (180 LF) Class I perf East Dowling Rd Ext Poly Ultra Flo - 18" & 24" Fort Richardson 2007 54" (1080 LF) 48" (320 LF) & 30" (270 LF) HC Contractors Richardson Hwy 18" (80 LF) & 24" (640 LF) Wilder Lakeshore Dr 2005 18" (380 LF) & 36" (240 LF)

Polymeric CMP It features a 10 mil polymer film applied to each side of a galvanized steel coil AFTER the galv process. Freeze/Thaw Testing: ASTM A742 – 100 cycles between room temperature and -18 C, without any visible changes to the polymer coating

LOCAL – 111 E 100th Ave ANCHORAGE

Thank You! Questions?