B01 Attachment J01b Stephenson WLX plan set_JW stamped Mar26.pdf

This document is a set of construction plans and specifications for the Stephenson Water Line Extension project in Caddo County, Oklahoma, serving the Apache Tribe of Oklahoma. The project is authorized under Public Law 86-121 I.H.S. and is designated as Project No. OK23-W92. The construction drawings span 12 sheets and include location maps, construction notes, utility details, line profiles, and design specifications for the water system expansion scheduled for completion in March 2026.

The project involves installing approximately 2 Diameter Reinforced Polyethylene High-Density Polyethylene (DR11 HDPE) water main lines with two separate sections: Line 1 spanning from STA 0+00 to STA 19+20 and Line 2 from STA 0+00 to STA 26+60. Construction includes water main installations at specified depths, tapping points to existing water service lines, installation of gate valves, meter stations, flush hydrants with gate valves and tracer wire locate stations, thrust blocks, and saddle tee connections. The drawings detail roadway crossings with 4-inch casing pipe, trench requirements, utility coordination specifications, compaction standards per ASTM D1557, and disinfection protocols meeting AWWA C651 standards. Engineering contacts are provided through the Indian Health Service, with project oversight by the Oklahoma City Area Indian Health Service Environmental Health and Engineering Division located in Lawton, Oklahoma.