Lockport Lock and Controlling Works
Dam in Will County, Illinois · Chicago Sanitary & Ship Canal · forms Illinois River Lockport LD
Height
65 ft
20 m (NID height)
Length
1,100 ft
335 m
Completed
1933
Illinois River Lockport LD today
576.07 ft
7 days ▲ 0.42 ft
Much above normal for the date
Reservoir level measured Oct 23, 2026, 10:00 AM CDT. Full level page →
Facts
- Purposes
- Navigation; Hydroelectric; Flood Risk Reduction
- Dam type
- Concrete
- Structural height
- 65 ft
- Owner
- USACE - Chicago District (Federal)
- Maximum storage
- 25,000 acre-ft
- Surface area
- 2,112 acres
- Hydraulic height
- 42 ft
- Drainage area
- 740 sq mi
- Spillway
- Controlled
- Navigation locks
- 1
- Army Corps district
- Chicago District
- NID ID
- IL00007
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 6, 2026. Search NID ID IL00007 at nid.sec.usace.army.mil. Project website.