Ottumwa Generating Station Pond Closure and Wastewater Treatment Facility
Ash Impoundment & Pond Closure
Project Details
Developer:
Interstate Power and Light Company / Alliant Energy
Engineer:
Burns and McDonnell
Location:
Ottumwa, IA
Work Scope
28 acres pond closure
5,000 linear feet of silt fence
Dewatering and stormwater management system
250,000 cubic yards of CCR material removal to main ash pond
115,000 cubic yards of CCR material removal in main pond
130,000 cubic yards of earthen berm construction
130,000 square yards of GCL liner
128,000 square yards of 60 MIL LLDPE liner installation
200,000 square yards of geotextile installation
40,000 tons of granular cover
3,500 cubic yards of concrete pavement
41,200 tons rip-rap
175,000 cubic yards of CCR material graded in place for closure
83,000 cubic yards of compacted cover soil placement
35,000 cubic yards of topsoil placement
5,900 linear feet of access road grading and stone placement
31,000 square yards hydroturf
40 acres of seeding and mulch
Piping and Structures
Ash water pump recycler and above-grade enclosure
Piping to main ash pond
Ash water pump discharge lines
Electrical cables from main ash pond to the plant
Concrete slabs and pads around new power plant structure
