105 SECTION 209 DESCRIPTION
209.01.01 General. This work consists of furnishing, hauling, placing, and compacting drain backfill material
around structures or perforated underdrains. MATERIALS
209.02.01 General. Material shall conform to the following Subsection:
Drain Backfill ................................ ................................ ................................ ................................ ........................... Subsection 704.03.01 CONSTRUCTION
209.03.01 General. Compact drain backfill to the satisfaction of the Engineer.
Do not compact by ponding or jetting.
209.03.02 Underdrains. Excavate and place drain backfill according to Section 607.
METHOD OF MEASUREMENT
209.04.01 Measurement. Drain backfill will be measured by the cubic meter (cubic yard).
BASIS OF PAYMENT
209.05.01 Payment. The accepted quantities, measured as provided above, will be paid for at the contract
price per unit of measurement for the pay item listed below that is shown in the proposal. Payment will be full compensation for the work prescribed in this Section. Payment will be made under: Pay Item Pay Unit (type) Drain Backfill ................................ ................................ ................................ ................................ ........... Cubic Met er (Cubic Yard) 107 SECTION 211 EROSION CONTROL DESCRIPTION
211.01.01 General. This work consists of salvaging topsoil, furnishing and placing topsoil, seeding, hydro-
seeding, placing erosion control fabric, and applying soil stabilizer on graded and disturbed areas. Coordinate erosion control work with the Storm Water Pollution Prevention Plan (SWPPP). Coordinate erosion control work with NPDES Phase 2 permit requirements. Per NPDES Phase 2 permit requirements , 70% of pre-disturbance native plant cover shall be achieved before the Notice of Termination (NOT) can be issued. If adequate coverage is not achieved, reapply all components of erosion control treatment. Unless the project site is irrigat ed, perform seeding and hydro-seeding from September 15 to February 15 for any year. Apply erosion control work within 60 days of finish grading unless this date falls outside of September 15 to February 15. Apply erosion control treatments per specifications and the Department’s Best Management Practice Manual within 30 days of finish grading to all areas not treated between September 15 and February 15. Upon completion of installation and approved inspections, provide a certification letter from a Certified Professional in Erosion and Sediment Control (CPESC) that the project has been installed in accordance with the approved plans and Department approved changes. In addition to the requirements in Section 637, do not allow Cheatgrass (Bromus tectorum ) or Red Brome (Bromus rubens) within the project area. Remove weeds by hand or treat with herbicides approved for use on the QPL and apply according to manufacturer’s directions. MATERIALS
211.02.01 General. Material shall conform to the following Section:
Roadside Materials .................................................................................................................................................................. Section 726 The rates of application of amendments, inoculants, seed, mulch, tackifier, and soil stabilizer will be specified in the contract documents. CONSTRUCTION
211.03.01 Topsoil (Salvage). Topsoil (salvage) consists of removing existing topsoil, stockpiling, treating if
required, preparing areas for placement, placing at designated areas, and compacting. Remove existing topsoil to a depth of 150 mm (6 in.) maximum or as shown or specified. Screen the material according to Subsection 726.03.02. Stockpile this material in approved areas. Do not stockpile topsoil more than 1.8 m (6 ft) in height and do not compact stockpiles. Stabilize stockpiles of topsoil that are in place for less than 1 month with water or dust palliative. Dust palliative shall not inhibit vegetative growth. For topsoil stockpiles in place more than 1 month, apply an erosion control treatment to the stockpile consisting of a slurry with seed, soil inoculant, mulch, tackifier, water, and amendments as specified. Maintain stockpiles using Best Management Practices in accordance with NDOT’s Construction Site Best Management Practices Manual. If areas for topsoil stockpiles are limited and require stockpiling at heights greater than 1.8 m (6 ft) in height, apply an erosion control treatment as specified above. Prepare final placement areas by cultivating and roughening slopes with rippers, discs, or other approved equipment, in the direction with the contours where possible to a depth of 150 mm (6 in.).