47' - Near this height, Suson Way Court off Wells Road and Kerth Forest Drive near Kerth Road begin flooding.
46.5' - During the flood of December 2015, MODOT closed I-55 in both directions near this height.
43.5' - Missouri Highway 141 near Springdale Park and Hilltop Drive will close near this height.
43' - Keystone Court walk-out basements and patios in south Fenton begin flooding near this height.
42.9' - Missouri Route 21, also known as Tesson Ferry Road, is closed near this height.
42.5' - Water enters the office trailer at used car lot at the bottom of Hilltop Drive near Highway 141 and Romaine Creek.
40.5' - Near this height, Heintz Road near New Baumgartner Road begins flooding.
40' - Winter Valley Drive walk-out basements in south Fenton start flooding near this height.
39.5' - The houses along Convair Drive in Arnold begin flooding.
38' - Near this height, Yaeger Road near the Mattese Creek bridge begins flooding.
37.4' - Homes on Countryside Circle, Eljon Drive, Babbs Lane, and Lavernal Lane begin flooding.
36.5' - Houses on Cool Valley Drive east of Highway 141 begin flooding. In Arnold, the corner of Convair Drive and Douglas Drive begins flooding.
36.4' - In South County, New Baumgartner Road near the Mattese Creek bridge southwest of Heintz Road begins to flood.
35.1' - Intersection of Romaine Creek Road and Old Missouri 141 begins flooding.
35' - Covered Bridge RV Park and Storage begins flooding near this height east of Highway 141.
34.3' - Near this height, Old Baumgartner Road begins flooding near the Mattese Creek bridge.
32' - Near this height, New Baumgartner Road in front of the Fred Weber Quarry begins flooding.
31' - Near this height, Old Baumgartner Road near Brookstone Terrace Drive begins flooding.
30' - Wells Road below Suson Woods begins flooding at this height.
27' - Meramec Bottom Road between Wells Road and Kerth Road begins flooding near this height.
26' - Athletic fields east of I-55 begin flooding near this height.
25.1' - St. Louis County closes the following roads at this height: Butler Hill west of Summerhedge Place, Meramec Bottom Road between Hagemann Road and Highway 21, Hawkins Road south of Meramec Bottom Road, and Old Telegraph Road at Earl Widman County Park.
24.7' - Hawkins Road south of Meramec Bottom Road begins flooding.
24' - Corisande Hills Road begins flooding at this height. Meramec Bottom Road between Hagemann Road and Highway 21 begins flooding.
23.9' - The boat ramp and fishing banks at Flamm City Access and the fishing banks at Arnold City Park are flooded near this height. At Flamm City Access, this height will vary with the Mississippi River flow.