information - Scottish Natural Heritage

Countryside Commission for Scotland
Battleby Redgorton Perth PH13EW
0 Perth (0738)27921
DYKES CROSSING WETLAND, STREAMS etc.
A dyke crossing wetland may "be
constructed as "below with a series
of small lunkie holes allowing a
through flow of water.
If dyke construction of any type is impossible the
dyke may be brought to a wall head on either side
of the soft bearing and a fence used to continue
the line of the dyke.
Small diameter sections of
clayware pipe built into a dyke
at suitable intervals along the
base allows water movement.
A lunkie hole built
to allow a stream
passage through a
dyke. A metal grille
hung on the downstream
face of the lintel and
swinging freely deters
animals but allows
debris through.
INFORMATION
4.10.12
SHEET
If the bearing is soft, found stones
should "be increased in size and bedded
in gravel. Lining the trench with
woven/non-woven textile membranes
will give excellent stabilization.
A section of reinforced concrete
drain may be used allowing a
small stream to pass through a
dyke.
NB: Dykes must have more massive founds where water erosion is possible,
stream beds should be consolidated in the vicinity of dykes, openings
should be adequate to deal with spate conditions.
©c.cs.
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