R 281.837 Stream bank protection; pipeline and utility projects.

Rule 27. (1) Following the installation of the pipeline or cable, A permittee shall immediately restore all work areas along or across streams or lakes and shall stabilize the exposed beds and banks within 7 days, except where subsequent permission is provided for a pumping and testing operation. (2) A permittee shall ensure that all disturbed stream banks have a finished slope not steeper than 1 vertical to 2 horizontal to prevent sloughing until stabilized by vegetative cover or riprap. A permittee shall ensure that the 1 on 2 slope is graded up and back to the high waterline. A permittee shall ensure that if the top of the natural bank is more than 3 feet above the high waterline, a minimum 10-foot long berm is constructed at the highwater line and the remaining slope is constructed upward parallel with, or on a flatter slope than, the original natural bank. (3) A permittee shall ensure that all raw soil exposed above the permanent riprap protection line is sodded, riprapped, or seeded, fertilized, and mulched. A permittee may use temporary riprap (sandbags). (4) A permittee shall ensure that mulching, seeding, and fertilizing is done in accordance with natural resource conservation service standards and specific soil test analysis for appropriate fertilizer application rates. (5) A permittee shall ensure that permanent riprap is placed from the bed of the channel to an elevation necessary to assure bank stabilization. A permittee shall ensure that permanent riprap is a 5-to-1 mix of sand to cement in burlap or canvas bags or biodegradable sacks, fitted broken concrete, properly sized rock, or other material approved by the department. A permittee shall ensure that riprap is free of protruding reinforcing metal. (6) A permittee shall ensure that deflecting dikes, which are reinforced by 1 row of sandbags, are used to divert runoff and minimize slope erosion from steep slopes adjacent to water crossings where the contributing runoff could be great enough to cause slope erosion. A permittee shall ensure that water is diverted to undisturbed areas adjacent to the right-of-way. (7) A permittee shall ensure that deflecting dikes are placed along the top of all stream banks where the entire slope is not protected with riprap. A permittee shall also place deflecting dikes at the top of, and at 100-foot intervals or less on, slopes greater than 20%.