Loading...
§ 11.06.090.030 MINING OF MATERIAL REQUIRING EXCAVATION FROM PITS OR POOLS.
   Provided, in addition to the requirements of § 11.06.090.020, that:
   (A)   A buffer strip of undisturbed land of sufficient width as determined by an engineer to prevent flood flows from channeling into the excavation is left between the edge of the channel and the edge of the excavation (ARM § 36.15.602(1)(a));
   (B)   The excavation meets all applicable laws and regulations of other local and state agencies (ARM § 36.15.602(1)(b)); and
   (C)   Excavated material may be processed on site but is stockpiled outside the floodway (ARM § 36.15.602(1)(c)).
(Prior Code, § 11.06.090.030) (Ord. 6, passed 3-16-1981; Ord. 2021-15, passed 12-20-2021)
§ 11.06.090.040 RAILROAD, HIGHWAY AND STREET STREAM CROSSINGS.
   Including other transportation related crossings provided, in addition to the requirements of § 11.06.090.020, that:
   (A)   Crossings are designed to offer minimal obstructions to the flood flow (ARM § 36.15.602(2));
   (B)   Where failure or interruption of public transportation facilities would result in danger to public health or safety and where practicable and in consideration of FHWA Federal-Aid Policy Guide 23 C.F.R. § 650A:
      (1)   Bridge lower chords shall have freeboard to at least two feet above the base flood elevation to help pass ice flows, the base flood discharge and any debris associated with the discharge; and
      (2)   Culverts shall be designed to pass the base flood discharge and maintain at least two feet freeboard on the crossing surface;
   (C)   Normal overflow channels, if possible are preserved to allow passage of sediments to prevent aggradations; and
   (D)   Mid-stream supports for bridges, if necessary, have footings buried below the maximum scour depth.
(Prior Code, § 11.06.090.040) (Ord. 6, passed 3-16-1981; Ord. 2021-15, passed 12-20-2021)
§ 11.06.090.050 LIMITED FILLING FOR ROAD AND RAILROAD EMBANKMENT.
   Including other transportation related embankments not associated with stream crossings and bridges; provided in addition to the requirements of § 11.06.090.020, that:
   (A)   The fill is suitable fill;
   (B)   Reasonable alternate transportation routes outside the floodway are not available (ARM § 36.15.602(3)); and
   (C)   The encroachment is located as far from the stream channel as possible (ARM § 36.15.602(3)).
(Prior Code, § 11.06.090.050) (Ord. 6, passed 3-16-1981; Ord. 2021-15, passed 12-20-2021)
Loading...