FLH PDDM Chapter 9 - Eastern Federal Lands Highway Division

9.4.F. Other Design Elements. (continued)Requests for waivers can only be granted for the following conditions:Wildflowers cannot be satisfactorily grown.The available right-of-way is to be used for agricultural purposes.There are no suitable available planting areas.The planting poses a threat to endangered or rare plant species.A waiver shall be documented with adequate justification in support of all findings and conclusions.Erosion control seeding is not a landscape item although wildflower seeding associated with the erosion controlseeding mix can satisfy wildflower seeding requirements in a landscape project.In order for wildflowers to perpetuate themselves, they must be permitted to go to seed and become dormant.Identify on the plans all areas to be seeded with wildflowers. Provide in the contract for the installation ofsuitable markers to identify the wildflower seed beds for roadside management and maintenance personnel.f. Slope Treatment. This technique consists of placing boulders, stumps, and old logs on cut and fill slopesto represent existing conditions beyond the clearing limits. These items are generally available on the project.Logs and stumps can be randomly staked to approximate a natural scattering on an adjacent slope. Boulderscan be placed individually or in clusters. They are usually worked into the slopes to appear as naturaloutcroppings.9 - 104