Administrative Rules of the State of Montana

(1) The applicant shall provide four copies of a lot layout document for the proposed subdivision. The lot layout document must be on a sheet no larger than 11" x 17". Multiple lots should be shown on one sheet, at a scale no smaller than 1" = 200'. Multiple sheets may be used for large developments.

(2) The following information must be provided on the lot layout document. Other information (e.g., percolation test results, soil profile descriptions) may be included on the lot layout document only if the document remains legible:

(a) the name of the subdivision, and the county, section, township and range (e.g., "Sec. 12 T27N R6E") in which the proposed subdivision is located;

(b) a north arrow and scale;

(d) an identifier or number for each lot (e.g., "Lot 1, Lot 2", "Tract 1, Tract 2", or "Parcel 1, Parcel 2") ;

(e) locations of existing and proposed easements;

(f) locations of existing and proposed roads;

(g) locations and sizes of existing and proposed storm water structures (culverts, ponds, dry wells, etc.) ;

(h) locations of drainageways;

(i) name and affiliation of the person who prepared the lot layout;

(j) information as set out in Table 1 for the specific water supply and wastewater systems in the subdivision. All systems must be labeled as "existing" or "proposed".

TABLE 1

REQUIREMENTS FOR LOT LAYOUTS

	Subdivisions served by nonmunicipal wells	Subdivisions served by nonmunicipal wastewater systems	Subdivisions served by municipal water	Subdivisions served by municipal wastewater systems
Existing and proposed wells and 100-ft setback	X	X	X	X
Water lines (suction and pressure)			X	X
Water lines (extension and connections)		X	X
Existing and proposed wastewater systems (drainfield, replacement area, and existing septic tanks)	X	X

	Subdivisions served by nonmunicipal wells	Subdivisions served by nonmunicipal wastewater systems	Subdivisions served by municipal water	Subdivisions served by municipal wastewater systems
Percent and direction of slope across the drainfield	X	X
Sewer lines (extensions and connections)	X	X	X	X
Lakes, springs, irrigation ditches, wetlands and streams	X	X
Percolation test locations, if provided, keyed to result form		X
Soil pit locations keyed to soil profile descriptions		X
Ground water monitoring wells keyed to monitoring results form		X
Floodplain boundaries	X	X	X	X
Cisterns		X
Existing building locations		X
Driveways		X

Subdivisions served by nonmunicipal wells

Subdivisions served by nonmunicipal wastewater systems

Subdivisions served by municipal water

Subdivisions served by municipal wastewater systems

Road cuts and escarpments or slopes > 25%

Mixing zone boundaries and direction of ground water flow

History: 76-4-104, MCA; IMP, 76-4-104, 76-4-125, MCA; Eff. 12/31/72; AMD, Eff. 11/4/73; AMD, Eff. 11/3/75; AMD, Eff. 5/6/76; AMD, 1977 MAR p. 746, Eff. 10/25/77; AMD, 1984 MAR p. 1027, Eff. 7/13/84; AMD, 1992 MAR p. 2145, Eff. 9/25/92; TRANS, from DHES, 1996 MAR p. 1499; AMD, 2002 MAR p. 1465, Eff. 5/17/02.