Common use of EROSION CONTROL MEASURES Clause in Contracts

EROSION CONTROL MEASURES. 1. Green Diamond shall use appropriate erosion control measures to minimize erosion and prevent sediment from entering watercourses during and following all activities covered under this Agreement. Such measures shall include but are not limited to: a) Road surfacing b) Dispersing runoff into stable vegetated filter areas c) Armoring with rock rip-rap d) End hauling waste material to stable locations that do not have potential to deliver sediment to watercourses e) Construction of rolling dips, critical dips, and waterbars f) Mulching including hydro-mulching g) Revegetating disturbed surfaces as soon as practical h) Slash packing 2. Where activities are conducted in close proximity to watercourses, Green Diamond shall use additional erosion control protection measures to trap sediment and minimize its entry into the watercourse. Slash filter windrows, silt fences, straw wattles, mulching and/or straw bale check dams shall be used to control runoff over fill slopes and along concentrated runoff flow paths, on an as-needed basis. 3. All watercourse crossings and cross drains shall be installed and functional prior to October 15th, or prior to the end of an “unseasonably dry fall”. 4. By October 15th, all waterbars, rolling dips, straw mulching and grass seeding associated with road and landing construction shall be completed in order to minimize suspended or mobilized sediment delivery to a watercourse. 5. Prior to the beginning of the first winter period following construction, Green Diamond shall seed all new cut and fill slopes on roads constructed within an RMZ or EEZ of a Class I, II, or III watercourse at a rate of at least 30 pounds per acre and mulched to a depth of at least two inches (before settling) with 90% surface coverage. 6. In Coho Planning Watersheds within the AHCP planning area for both new road construction and existing road maintenance in areas where existing road bank cuts have exhibited failures and have the potential to deliver to a watercourse, Green Diamond shall implement the following measures to the extent feasible to prevent sediment discharges to watercourses: hydrologically disconnecting the bank cut discharge from watercourses, buttressing, or other measures and by installing and maintaining effective erosion control materials. 7. All exposed areas associated with encroachment work at crossings shall be seeded at a rate of at least 30 pounds per acre and mulched to a depth of at least two inches (before settling) with 90% surface coverage. 8. Stream banks shall be stabilized as needed to prevent or minimize erosion and sediment delivery to watercourses where Green Diamond road infrastructure is at risk. 9. Material used for bank stabilization shall be clean, competent material that shall not discharge sediment or other forms of pollution to watercourses. 10. Repairs and maintenance of bank stabilization sites shall employ the same type of materials used in the original construction unless contraindicated.