The highway was constructed in 1929, same time as· the
picture in Ia-985 . The back slope was 2 to 1, however.
The same seeding and treatment were used in both places .
Note the lack of erosion and good growth of vegetation
as compared wiith…
In Bethany, Missouri.racing waters destroy roadbeds. Uncontrolled run-off from heavy rains overflows culverts and cuts into roadbeds. Every year accelerated
erosion causes highway; and road damage costing thousands of dollars
Ia- 1182 - H. G. Bromelkamp ,Monona , Ia. - 7/ 22/38
Soil profile of field seeded with small grain in May rain of 1932. Compare with Ia-1181. he average depth of topsoil is 4 inches. Soil is Tama silt loam.
A long, slope to the west with rows running north and south, but with a slight fall to the north and south to a waterway which had not been left in sod. When the field was plowed and planted, this ditch could be crossed. It was seeded with sudan…