Design a swale to convey a runoff of 60 ft3/s at a slope of 3%. The grassed swale will be located on Karst soil which is easily erodible and covered with Reed Canarygrass. The roughness coefficient is 0.05. No stormwater treatment (water quality check) is required. Show all the calculations to

For the soils that are classified by the following AASHTO symbols, what would be the most likely USCS symbols? (Reference: Liu, 1970) Gravels sands: A-l-a, A-l-b, A3, A-2-4, A-2-5, A-2-6, A-2-7 Fines: A-4, A-5, A-6, A-7-5, A-7-6

What is the purpose of a soils report, and how can the information it contains assist the estimator?

State whether the following are true or false. a. In the AASHTO classification Table 4.1, the soils that are more suitable for roadwork are located on the left than right. b. In AASHTO classification system, the better performing fine grained soils are the ones with lower group indices. c. In AASHTO classification system, sands are classified as grains with 0.075-4.75 mm diameter. d. The USCS symbol for clayey gravel is CG. e. A soil with USCS symbol SM is sandy silt.