NRMCA Producer member Prairie Materials is playing a key role in helping the city of Indianapolis address its stormwater runoff problems. The ready mix producer is supplying shotcrete to help complete a 285-ft deep entrance shaft at a wastewater treatment plant. The 44-ft. circumference shaft is reinforced with concrete slurry walls for the first 100 feet to stabilize the softer overburden and connect to the bedrock. "This is the first time shotcrete with steel fibers has been used in Indianapolis," reports Kerry Webb, Prairie Indiana quality control manager. The mix is meeting all its specs. "Tests show that we are reaching the correct strengths and uniformity and it’s ready for production."