§ 11-1-78 RAILROAD, HIGHWAY AND STREET STREAM CROSSINGS.

   Railroad, highway and street stream crossings may be permitted; provided that:

   (A)   Crossings are designed to offer minimal obstructions to the flood flow;

   (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. part 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 are designed to pass the base flood discharge and maintain at least two feet freeboard on the crossing surface.

         (a)   If possible, normal overflow channels are preserved to allow passage of sediments to prevent aggradations;

         (b)   Mid stream supports for bridges, if necessary, have footings buried below the maximum scour depth; and

         (c)   An encroachment analysis is prepared by an engineer.

(Ord. 2013-01, passed 1-30-2013)

Statutory reference:

   Uses requiring permits, see ARM 36.15.602

§ 11-1-79 LIMITED FILLING FOR ROAD AND RAILROAD EMBANKMENTS.

   Limited filling for road and railroad embankments not associated with stream crossings and bridges may be permitted; provided that:

   (A)   The fill is the suitable fill;

   (B)   Reasonable alternate transportation routes outside the floodway are not available;

   (C)   The encroachment is located as far from the stream channel as possible;

   (D)   The project includes mitigation of impacts to other property owners in the vicinity of the project and the natural stream function; and

   (E)   An encroachment analysis is prepared by an engineer.

(Ord. 2013-01, passed 1-30-2013)

Statutory reference:

   Uses requiring permits, see ARM 36.15.602(3)

§ 11-1-80 BURIED OR SUSPENDED UTILITY TRANSMISSION LINES.

   Buried or suspended utility transmission lines may be permitted; provided that:

   (A)   Suspended utility transmission lines are designed such that the lowest point of the suspended line is at least six feet higher than the base flood elevation;

   (B)   Towers and other appurtenant structures are designed and placed to withstand and offer minimal obstruction to flood flows;

   (C)   When technically feasible, the crossing will not disturb the bed and banks of the stream and alternatives such as alternative routes, directional drilling and aerial crossings are considered; and

   (D)   Utility transmission lines carrying toxic or flammable materials are buried to a depth of at least twice the calculated maximum scour depth determined by an engineer for the base flood.

(Ord. 2013-01, passed 1-30-2013)

Statutory reference:

   Uses requiring permits, see ARM 36.15.602(4)

§ 11-1-81 STORAGE OF MATERIALS AND EQUIPMENT.

   Storage of materials and equipment may be permitted; provided that:

   (A)   The material or equipment is not subject to major damage by flooding and is properly anchored to prevent flotation or downstream movement; and

   (B)   The material or equipment is readily removable within the limited time available after flood warning. Storage of flammable, toxic or explosive materials shall not be permitted.

(Ord. 2013-01, passed 1-30-2013)

Statutory reference:

   Uses requiring permits, see ARM 36.15.602(5)

§ 11-1-82 DOMESTIC WATER SUPPLY WELLS.

   Domestic water supply wells may be permitted; provided that:

   (A)   They are driven or drilled wells located on ground higher than surrounding ground to assure positive drainage from the well;

   (B)   They require no other structures (e.g., a well house);

   (C)   Well casings are water tight to a distance of at least 25 feet below the ground surface and the well casing height shall be a minimum of 18 inches above the base flood elevation;

   (D)   Water supply and electrical lines have a watertight seal where the lines enter the casing;

   (E)   All pumps and electrical lines and equipment are either of the submersible type or are adequately flood-proofed; and

   (F)   Check valves are installed on main water lines at wells and at all building entry locations.

(Ord. 2013-01, passed 1-30-2013)

Federal law reference:

   Utility guidelines, see 44 C.F.R. § 60.39

Statutory reference:

   Domestic water wells; permit required, see ARM 36.15.602(6)

§ 11-1-83 BURIED AND SEALED VAULTS FOR SEWAGE DISPOSAL IN CAMPGROUNDS AND RECREATIONAL AREAS.

   Buried and sealed vaults for sewage disposal in campgrounds and recreational areas may be permitted; provided, the same meet applicable laws and standards administered by Montana Department of Environmental Quality. Only those wastewater disposal systems that meet the requirements and separation distances under ARM 17.36.101-116 and ARM 17.36.301-345 are allowed.

(Ord. 2013-01, passed 1-30-2013)

Federal law reference:

   Sanitary sewage systems, see 44 C.F.R. § 60.3(a)(6)

§ 11-1-84 PUBLIC AND PRIVATE CAMPGROUNDS.

   Public and private campgrounds may be permitted; provided that:

   (A)   Access roads require only limited fill and do not obstruct or divert flood waters;

   (B)   Meet the accessory structures requirements;

   (C)   An encroachment analysis must be prepared by an engineer;

   (D)   No dwellings or permanent mobile homes are allowed;

   (E)   Recreational vehicles and travel trailers are ready for highway use with wheels intact, with only quick disconnect type utilities and securing devices, and have no permanently attached additions; and

   (F)   There is no large-scale clearing of riparian vegetation within 50 feet of the mean annual high water mark (higher standard).

(Ord. 2013-01, passed 1-30-2013)

Federal law reference:

   Recreational vehicles, see 44 C.F.R. § 60.3(c)(14)

Statutory reference:

   Uses requiring permits, see ARM 36.15.602(2), 36.15.602(8)