Fig 2 - uploaded by Kevin M. Fraley
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Road shoulder and ditch design specifications. Note shallower slope for road shoulder relative to ditch channel.
Source publication
A report detailing the results of habitat additions to a roadside stream in Glacier Bay National Park containing rearing and spawning anadromous fishes.
Contexts in source publication
Context 1
... the Good River associated with the road corridor. Approximately 1,850 linear meters of newly created fish habitat along the easternmost limit of the road project was most heavily impacted. Ditches along the north and south sides of the road were created after road widening filled in previously existing ditches in this area. Newly created ditches (Fig. 2) were engineered with much lower angle bank slopes due to stability and rollover ...
Context 2
... ditch bottom substrate is predominantly sand with no observed particles larger than pebbles (4-8 mm). Prior to road construction in 1999, the substrate size class distribution at most sites was predominantly silt (Fig. 2A). However, larger gravel and cobble-sized particles were also apparently present despite the absence of cobble substrate in ...
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