PE Water Resources case studies
PE Water Resources · Put your knowledge to work in context.
The PE Civil: Water Resources and Environmental exam is one of NCEES's Principles and Practice of Engineering (PE) examinations. NCEES describes the PE exam as testing for a minimum level of competency in a particular engineering discipline, and it is designed for engineers who have gained at least four years of post-college work experience in that discipline. The PE Water Resources case studies are 5 cases and about 4,237 words.
1Storm Sewer Surcharge in an Infill Development
A 1970s subdivision is being redeveloped as an infill townhome project (9.8 acres, 72% impervious). The existing storm sewer along the frontage is 600 ft of 24-inch RCP (n = 0.013) laid at 0.004 ft/ft between two manholes.
766 words, about 4 min2Loss of Chloramine Residual in a Storage-Tank-Dominated Zone
A 14,000-customer distribution system chloraminates at the treatment plant. To stay under a TTHM limit, the operator cut the chlorine dose, pushing the applied Cl₂:NH₃-N weight ratio from about 4.5:1 to roughly 3.2:1.
873 words, about 4 min3Ammonia Breakthrough After a Cold Snap at a Small Activated Sludge Plant
A 0.75 MGD extended-aeration plant serves a community with a year-round ammonia limit of 4.0 mg/L monthly average. Current flow is 0.55 MGD.
807 words, about 4 min4Flood Frequency, an Outlier, and a High-Hazard Dam Spillway
A 60-ft-high earth embankment dam is classified high hazard (about 40 homes in the inundation zone) and was built in 1968 with an uncontrolled service spillway that passes 5,200 cfs at the dam crest. The gage a mile downstream has 45 years of record.
948 words, about 5 min5Time Extension, Weather Days, and an Acceleration Claim
A 6.8M contract for 14,000 ft of 16-inch water main runs 240 calendar days with liquidated damages of 1,500/day. The baseline CPM schedule shows the main line on the critical path with zero float.
843 words, about 4 min