Kleinham's Discovery Part 2 - Flathead County, Montana

so they are 12" to 18" hieher than the adjacent land. allowing water to
drain from the roads and to veeetated roadside sh+llow swales or
vegetated lawns where the water can be lost to surface infiltration and
evapotranspiration. Road grades. as well as adjacent swales and lawn
areas. will also be relatively flat so water draining from the roads will do
so in a diffirse manner precMi{rg the concentration of runoffwater at any
giyen-location. At several locations. swales will be constructed to channel
runoff water along propert_v lines. or where gaps exists between lots. and
convey that water to common areas and/or ponds constructed on site-
A primarv focus of the drainaee plan will be to spread smaller quantities
of runoff ryater out over laree areas with multiple points of discha.rse.
This method of stonnwater management commonlv referred to as Low
Impact Development GID) Best Management Practices (BMP's), will be
incorporated throughout the site _to allow the treatrnent and disposal of
runoff water at or near the source. The conventional design of collecting
and conveying large quantities of water to single points of discharge
ereatly inhibitsJroper treatment and onlv complicates the proper disposal
of runoff water.
Stormwater runoff will generally bp drained from the lots following
existing and finished surface.slooes: however. some prading or channeling
mav be necessar.v to divert water around structures or alonq property
boundaries- Because m-uch of the area is flat. drainage on many lots will
be provided by constructins houses with finished floor elevatigns that are
2 ft. to 2.5 ft- higher than the natural ground surface and filling_around the
building epvelope Io provide for drainage away from the structure. This
gradine activitv will create drainagg swales along the properf.v lines of
adjoinine lots allowing runoff wate_r to drain to the road or to corrunon
areas in back of tbe lots. several drainage swales will be constructed
along lot lines. during the co,nstruction of rpfiastructure improvements. to
convey water to common areas or ponds.
Prior to construction of roads and utilitv improvements. silt fencing will be
installed alonq off-road drainaees. along wetland area and along any other
area where the possible discharge of runo water could adverselv affect
water qrurhU or adjacent properties. Silt fencing or straw bale barriers
will be installed at the inlet ends of new and existing culverts- and rock
riprap will be installed at the outlet ends of these culverts. After
completins construction of roads and utilities. all disturbed areas. outside
of roadways. will be graded. covered with topsoil. and hydroseeded. tn
areas where cuts or fills create slopes sreater than 15olo. such areas will be
hydroseeded and then covered with erosion control matting. Ail erosion
qnd sediment control devices will comply with the MDEO Sediment and
Erosion control Manual and all temporary sediment and erosion cqntrol
t9
North Shore Ranch
Kleinhans Farms v. Flathead Co.
County File -- 3105