1. US Army Corps of Engineers BUILDING STRONG ® Little Calumet River Forest Ave Levee System Periodic Inspection No.1 Yuki Galisanao, PE, PG Team Lead, Geotechnical Engineer Chicago District September 10, 2015 FOR OFFICIAL USE ONLY

2. BUILDING STRONG ® 2 Agenda System Description Design Criteria Review Inspection Findings Conclusions & Recommendations FOR OFFICIAL USE ONLY

3. BUILDING STRONG ® 3 SYSTEM DESCRIPTION FOR OFFICIAL USE ONLY

4. BUILDING STRONG ® 4 FOR OFFICIAL USE ONLY

5. BUILDING STRONG ® 5 Summary Information This is part of a federally authorized and non-federally operated and maintained urban flood-protection project. It was non-federally constructed and incorporated into the project when the PCA was signed. The State Line Rd tieback was non-federally constructed and is waiting for approval under the Section 408 Permit process to be incorporated into the project. The overall Little Calumet River Project was authorized to a 200 year level of protection. The levee portion of the Forest Ave system was constructed to the 200 year. The State Line Rd tieback and the area between Hohman Ave and the NICTD Railroad does not quite provide a 200 year level of protection. Plans to achieve the 200 year level of protection will be completed at a later date and will include raising the State Line Rd Tieback and constructing floodwall in the neighboring Southmoor subdivision east of Hohman Ave. FeaturesMeasurement Levee2,000 LF Sheet Pile Wall325 LF Concrete Block Wall1,950 LF Gap Closures9 Culverts6 Check Valves3 Pump Stations2 Protected Area55 acres FOR OFFICIAL USE ONLY

6. BUILDING STRONG ® 6 Project Modifications Permit 10-06 7258 Forest Ave Drainage o The permit request consists of installing a perforated drain line along the toe of the levee and connecting to a catch basin and 8 inch PVC pipe that leads out to a storm inlet on the road. This request was submitted in response to was backflow of river water through a flap gate that caused interior flooding of a property behind the levee during the 2008 flood. Permit 11-02 Forest Ave Levee Repairs o The work consisted of removing vegetation from the levee; repairing holes left in the levee from tree removal; drainage modifications that included replacing portions of culverts, adding manholes and check valves; and seeding. Construction occurred from October to December 2012. Permit 13-05 State Line Tieback o The work consisted of constructing a semi-permanent concrete block wall with gaps along State Line Road up to the 100 year level of protection. The wall was not tied into the existing levee. Although the Local Sponsor did not receive approval for the permit, construction took place between Nov 2013 and Jun 2014. Permit 15-01 Forest Ave Manhole o The work consists of removing the pump in the manhole at Station 1+38.31, cleaning the pipes, abandoning the 2 inch PVC pipe by backfilling the pipes and manhole with flowable fill, removing the check valve, and then capping the manhole with clay and seed. FOR OFFICIAL USE ONLY

7. BUILDING STRONG ® 7 Foundation Geology FOR OFFICIAL USE ONLY

8. BUILDING STRONG ® 8 DESIGN CRITERIA REVIEW FOR OFFICIAL USE ONLY

9. BUILDING STRONG ® CriteriaGuidanceApplicableCriteria MetComment Hydrologic Analysis of Interior Areas EM 1110-2-1413 (15 January 1987) Yes  An interior hydraulic analysis was performed for the Forest Avenue levee segment that conforms with the EM requirements River Hydraulics EM 1110-2-1416 (15 October 1993) Yes  Due to the complex hydraulics (flow splits, flat gradient) unsteady flow modeling was selected as the appropriate hydraulic analysis method Channel Stability Assessment for Flood Control Projects EM 1110-2-1418 (31 October 1994) Yes  A sediment analysis was provided in FDM 5 Volume 2 Appendix A pages A-23and A-24. There have been no significant changes to the channel in regard to the Forest Avenue Levee Hydraulic Design of Flood Control Channels EM 1110-2-1601 (30 June 1994) Yes  Adequate erosion protection (rip rap) design was included Risk Based Analysis for Flood Damage Reduction Studies EM 1110-2-1619 (1 August 1996) Yes  The 13 May 2010 memo includes a risk analysis consistent with the EM requirements USACE Process for the National Flood Insurance Program Levee Evaluation (NFIP) EC 1110-2-6067 (31 August 2010) Yes  The risk analysis included in the 13 May 2010 memo is consistent with the EC requirements.  The Corps has not performed a full levee system evaluation in support of the NFIP for Forest Avenue/ State Line Levee. Risk Analysis for Flood Damage Reduction Studies ER 1105-2-101 (3 January 2006) Yes  The risk analysis developed for the 13 May, 2010 memo is consistent with the requirements of the ER Hydraulic Design for Local Flood Protection Projects ER 1110-2-1405 (30 September 1982) Yes  The unsteady flow model developed to evaluate the levee is of sufficient detail and complexity to evaluate the potential flood risk posed by Little Calumet River/Thorn Creek. Overtopping of Flood Control Levees and Floodwalls ETL 1110-2-299 (22 August 1986) Yes  A superiority analysis was performed that includes the Forest Avenue Levee segment. The superiority analysis assumes the Corps design with 200 year plus freeboard protection between the NICTD railroad and the stateline with overtopping of the Illinois levee at the state line. The portion between the NICTD railroad and Hohman Avenue was not constructed, but would likely overtop at about the same time as the state line tieback. The intent of the ETL would be satisfied, i.e. overtopping would occur in locations that would have a minimal probability of catastrophic impacts 9 Hydraulics FOR OFFICIAL USE ONLY

10. BUILDING STRONG ® 10 Geotechnical FOR OFFICIAL USE ONLY CriteriaGuidanceApplicableCriteria MetComment Settlement Analysis EM 1110-1-1904 (30 September 1990) YesNo  No design documentation available. Seepage Analysis and Control for Dams EM 1110-2-1901 (30 April 1993) YesNo  No design documentation available. Slope Stability EM 1110-2-1902 (31 October 2003) YesNo  No design documentation available. Instrumentation of Embankment Dams and Levees EM 1110-2-1908 (30 June 1995) YesNo  The EM does not prescribe mandatory requirements, but does recommend an instrumentation plan be developed. No instrumentation is present at the project, and no instrumentation plan was available for review. Construction of Levees EM 1110-2-1913 (30 April 2000) YesNo  No design documentation available showing that the proper seepage, settlement, and stability analysis was conducted. Crest width is less than 10’, and there is no record of an inspection trench. Design, Construction and Maintenance of Relief Wells EM 1110-2-1914 (29 May 1992) NoN/A  No design documentation available. Stability Analysis of Concrete Structures EM 1110-2-2100 (1 December 2005) YesNo  No design documentation available. Retaining and Floodwalls EM 1110-2-2502 (29 September 1989) YesNo  No design documentation available. Earthquake Design and Evaluation for Civil Works Projects ER 1110-2-1806 (31 July 1995) YesNo  While the project lies in a low risk seismic zone, ER-1110-2- 1806 still requires a seismic evaluation. No documentation regarding seismic investigations was available. Engineering and Design, Design Guidance for Levee Underseepage ETL 1110-2-569 (1 May 2005) YesNo  No design documentation available. Evaluation of I-WallsETL 1110-2-575 (1 Sep 2011) YesNo  No design documentation available.

11. BUILDING STRONG ® 11 Civil FOR OFFICIAL USE ONLY CriteriaGuidanceApplicableCriteria MetComment Standards and Procedures for Referencing Project Elevation Grades to Nationwide Vertical Datums EM 1110-2-6056 (31 December 2010) YesNo  Notes on provided drawings indicated NGVD29 and Little Calumet River Coordinate System. Design and Construction of Levees EM 1110-2-1913 (30 April 2000) YesNo  No design documentation available. Conduits, Culverts, and Pipes EM 1110-2-2902 (31 March 1998 Change 1) YesNo  No design documentation available. Policies for Referencing Project Elevation Grades to Nationwide Vertical Datums ER 1110-2-8160 (1 March 2009) YesNo  Notes on provided drawings indicated NGVD29 and Little Calumet River Coordinate System. Guidelines for Landscape Planting and Vegetation Management at Levees, Floodwalls, Embankment Dams, and Appurtenant Structures ETL 1110-2-571 (10 April 2009) YesNo  No design documentation available.

12. BUILDING STRONG ® 12 Structural FOR OFFICIAL USE ONLY CriteriaGuidanceApplicableCriteria MetComment Evaluation and Repair of Concrete Structures EM 1110-2-2002 (30 June 1995) NoN/A  The criteria given in this manual is for maintenance purposes, not design. Structural Design of Concrete Lined flood Control Channels EM 1110-2-2007 (30 April 1995) NoN/A  Not Applicable Stability Analysis of Concrete Structures EM 1110-2-2100 (1 December 2005) NoN/A  Not Applicable Strength Design for Reinforced Concrete Hydraulic Structures EM 1110-2-2104 (20 August 2003) Yes  The pump station outfall structures were designed in accordance with this document. Design of Hydraulic Steel Structures EM 1110-2-2105 (31 May 1994) NoN/A  Not Applicable Retaining and Flood Walls EM 1110-2-2502 (29 September 1989) Yes  The block wall was evaluated for sliding per this EM and met the safety factors. The SSP structure acts as a seepage barrier and stability support to the levee embankment. However, this levee section is called a flood wall in some project documents. Design of Sheet Pile Walls EM 1110-2-2504 (31 March 1994) NoN/A  Not Applicable Structural Design of Closure Structures for Local Flood Control Protection Projects EM 1110-2-2705 (31 March 1994) NoN/A  Not Applicable Design of Pile Foundations EM 1110-2-2906 (15 January 1991) NoN/A  Not Applicable Structural and Architectural Design of Pumping Stations EM 1110-2-3104 (30 June 1989) Yes  Concrete modifications to the existing pump stations were designed in accordance with this document. New pump stations also meet these criteria. Inspection, Evaluation and Repair of Hydraulic Steel Structures EM 1110-2-6054 (1 December 2001) NoN/A  Not Applicable Responsibility for Hydraulic Steel Structures ER 1110-2-8157 (31 January 1997) NoN/A  Not Applicable Evaluation of I-WallsETL 1110-2-575 (1 Sep 2011) NoN/A  Not Applicable

13. BUILDING STRONG ® 13 Mechanical/Electrical FOR OFFICIAL USE ONLY CriteriaGuidanceApplicableCriteria MetComment General Principles of Pumping Station Design and Layout EM 1110-2-3102 (February 1995) YesNo  Discharge chamber at Forest Avenue pump station is not to the protection elevation. 7.4.b. Mechanical and Electrical Design of Pumping Stations EM 1110-2-3105 (August 1994) YesNo  No documentation

14. BUILDING STRONG ® INSPECTION FINDINGS 14 FOR OFFICIAL USE ONLY

15. BUILDING STRONG ® Preliminary Segment/System Rating 15 FOR OFFICIAL USE ONLY Segment / SystemRating Forest Ave Minimally Acceptable AcceptableMinimally AcceptableUnacceptable All items or components are rated as ACCEPTABLE One or more items are rated as MINIMALLY ACCEPTABLE or one or more items are rated as UNACCEPTABLE and an engineering determination concludes that the Unacceptable items would not prevent the segment / system from performing as intended during the next flood event. One or more items are rated as UNACCEPTABLE and would prevent the segment / system from performing as intended, or a serious deficiency noted in past inspections (which had previously resulted in a minimally acceptable system rating) has not been corrected within the established timeframe, not to exceed two years. Rehabilitation Program Status Active

16. BUILDING STRONG ® Field Inspection 16 FOR OFFICIAL USE ONLY  Date of Inspection – May 4, 2015  Levee Team: Yuki Galisanao – USACE Lead John Groboski – USACE Civil Adam Karr – USACE GIS Tina Kowitz – USACE Geotechnical Erin Maloney – USAC Hydraulics Andy Wadysz – USACE Structural Dan Repay – LCRBDC Mark Gordish - City of Hammond  Pump Station Team: Ernie Go – USACE Electrical Robert Sezonov – USACE Mechanical Ricky Wilcox – Hammond Sanitary District

17. BUILDING STRONG ® Deficiency Map 17 FOR OFFICIAL USE ONLY

18. BUILDING STRONG ® Individual Item / Component Rating Definition AcceptableMinimally AcceptableUnacceptable The inspected item is in satisfactory condition, with no deficiencies, and will function as intended during the next flood event. The inspected item has one or more minor deficiencies that need to be corrected. The minor deficiency or deficiencies will not seriously impair the functioning of the item as intended during the next flood event. The inspected item has one or more serious deficiencies that need to be corrected. The serious deficiency or deficiencies will seriously impair the functioning of the item as intended during the next flood event. 18 FOR OFFICIAL USE ONLY

19. BUILDING STRONG ® General Items Rated ItemRatingComments 1. Operations and Maintenance Manuals M Forest Ave Levee System O&M Manual to be developed. It was identified as a separate system from the Hammond Levee. Manuals maintained by the City Engineering Department at City Hall and relevant copies distributed to appropriate internal agencies. 2. Emergency Supplies and Equipment A City of Hammond has ready inventory of flood fighting supplies and equipment. Primary resources available through public works department, but also can be supplemented by other city departments. Street Dept Public Works facility at 601 Conkey maintains pay loader, concrete blocks, portable welders, 69 pallets (100/pallet) of shrink- wrapped sandbags last checked 1-2 years ago, 2 forklifts, 1000 empty sandbags, 4 pallets of empty sandbags, and visqueen. Borrow source is Krooswyk. Hammond manually fills sandbags or uses a salt spreader to fill large quantities of bags. 3. Flood Preparedness and Training M Forest Ave Levee System flood response plan still to be developed. It was identified as a separate system from the Hammond Levee. Hammond uses reverse 911 and WJLB station to relay information. Public Works also uses frequency radios with the police and fire departments. Evacuation areas include City Hall, Civic Center, Jean Shepherd Community Center, Armory, Purdue University Calumet, Area Career Center. Fire Department has rescue boats. Specific features will need to be developed such as implementation of action levels for levee patrols, flood fighting, road closures, etc. A levee system Flood Warning Handbook is recommended to be prepared. Response action levels should be referenced to existing USGS River Gages at Hohman Ave. 19 FOR OFFICIAL USE ONLY

20. BUILDING STRONG ® Levee Embankment Rated ItemRating Number of Deficiencies 1. Unwanted Vegetation GrowthMinimally Acceptable4 2. Sod CoverAcceptable0 3. EncroachmentsAcceptable0 4. Closure StructuresNot Applicable- 5. Slope StabilityAcceptable0 6. Erosion / Bank CavingAcceptable0 7. SettlementAcceptable0 8. Depressions / RuttingAcceptable0 9. CrackingAcceptable0 10. Animal ControlMinimally Acceptable2 11. Culverts / Discharge PipesAcceptable0 12. Riprap Revetments & Bank ProtectionAcceptable0 13. Revetments other than RiprapAcceptable0 14. Underseepage Relief Wells / Toe Drainage SystemNot Applicable- 15. SeepageAcceptable0 20 FOR OFFICIAL USE ONLY

21. BUILDING STRONG ® Levee Embankment Unwanted Vegetation 21 FOR OFFICIAL USE ONLY

22. BUILDING STRONG ® Levee Embankment Animal Control 22 FOR OFFICIAL USE ONLY

23. BUILDING STRONG ® Floodwalls Rated ItemRating Number of Deficiencies 1. Unwanted Vegetation GrowthMinimally Acceptable1 2. EncroachmentsMinimally Acceptable1 3. Closure StructuresAcceptable0 4. Concrete SurfacesAcceptable12 5. Tilting, Sliding or Settlement of Concrete StructuresMinimally Acceptable3 6. Foundation of Concrete StructuresAcceptable0 7. Monolith JointsMinimally Acceptable3 8. Underseepage Relief Wells / Toe Drainage SystemsNot Applicable- 9. SeepageAcceptable0 23 FOR OFFICIAL USE ONLY

24. BUILDING STRONG ® Floodwalls Unwanted Vegetation and Encroachments 24 FOR OFFICIAL USE ONLY

25. BUILDING STRONG ® Floodwalls Concrete Surfaces 25 FOR OFFICIAL USE ONLY

26. BUILDING STRONG ® Floodwalls Tilting, Sliding or Settlement of Concrete Structures 26 FOR OFFICIAL USE ONLY

27. BUILDING STRONG ® Floodwalls Monolith Joints 27 FOR OFFICIAL USE ONLY

28. BUILDING STRONG ® Interior Drainage Rated ItemRating Number of Deficiencies 1. Vegetations and ObstructionsMinimally Acceptable2 2. EncroachmentsAcceptable0 3. Ponding AreasNot Applicable- 4. Fencing and GatesNot Applicable- 5. Concrete SurfacesMinimally Acceptable1 6. Tilting, Sliding, or Settlement of Concrete and Sheet Pile StructuresAcceptable0 7. Foundation of Concrete StructuresAcceptable0 8. Monolith JointsAcceptable0 9. Culverts / Discharge PipesAcceptable0 10. Sluice / Slide GatesNot Applicable- 11. Flap Gates / Flap Valves / Pinch ValvesAcceptable0 12. Trash RacksAcceptable0 13. Other Metallic ItemsAcceptable0 14. Riprap Revetments of Inlet/ Discharge AreasAcceptable0 15. Revetments other than RiprapNot Applicable- 28 FOR OFFICIAL USE ONLY

29. BUILDING STRONG ® Interior Drainage Vegetation and Obstructions 29 FOR OFFICIAL USE ONLY

30. BUILDING STRONG ® Interior Drainage Concrete Surfaces 30 FOR OFFICIAL USE ONLY

31. BUILDING STRONG ® Pump Stations Rated ItemRating Number of Deficiencies 1. Pump Stations Operating, Maintenance, Training, & Inspection ReportsAcceptable0 2. Pump Station Operations and Maintenance Equipment ManualsAcceptable0 3. Safety ComplianceAcceptable0 4. CommunicationsAcceptable0 5. Plant BuildingAcceptable0 6. Fencing and GatesAcceptable0 7. PumpsAcceptable0 8. Motors, Engines, Fans, Gear Reducers, Back Stop Devices, etc.Acceptable0 9. Sumps / Wet wellAcceptable0 10. Mechanical Operating Trash RakesNot Applicable- 11. Non-Mechanical Trash Racks Minimally Acceptable1 12. Fuel System for Pump EnginesNot Applicable- 13. Power SourceAcceptable0 14. Electrical SystemsAcceptable0 15. Megger Testing on Pump Motors and Critical Power CablesAcceptable0 16. Enclosures, Panels, Conduit and DuctsAcceptable0 17. Intake and Discharge PipelinesAcceptable0 18. Sluice / Slide GatesAcceptable0 19. Flap Gates / Flap Valves / Pinch ValvesAcceptable0 20. CranesNot Applicable- 21. Other Metallic ItemsAcceptable0 31 FOR OFFICIAL USE ONLY

32. BUILDING STRONG ® Pump Stations Non-Mechanical Trash Racks 32 FOR OFFICIAL USE ONLY

33. BUILDING STRONG ® CONCLUSIONS & RECOMMENDATIONS 33 FOR OFFICIAL USE ONLY

34. BUILDING STRONG ® Design Recommendations 34 FOR OFFICIAL USE ONLY

35. BUILDING STRONG ® Design Recommendations 35 FOR OFFICIAL USE ONLY  Geotechnical Perform a slope stability analysis to verify that the current levee condition, especially since the dimensions do not meet Corps standards. A seepage analysis should be performed for the levee since there is no record of an inspection trench. A seepage analysis should also be performed for the tieback wall. Perform settlement calculations and seismic analysis. Perform a subsurface exploration approximately every 1,000 feet, consisting of an exploration at the riverside toe, at the landside toe, and a deep exploration at the levee crest.  Civil Perform a subsurface investigation to verify levee material.  Structural Provide the design analysis for the sheet pile wall.  Mechanical The design analysis, plans, specifications, and equipment data should be provided for the South Hohman Pump Station.

36. BUILDING STRONG ® Inspection Recommendations 36 FOR OFFICIAL USE ONLY

37. BUILDING STRONG ® ItemRated ItemRatingRecommendations Levee Embankments 1. Unwanted VegetationM Remove trees on the levee and at the toe. Mow and maintain tall grass. 10. Animal ControlMFill open burrows. Floodwalls 1. Unwanted Vegetation Growth MRemove trees from next to sheet pile wall. 2. EncroachmentsMRemove debris from next to sheet pile wall. 5. Tilting, Sliding or Settlement of Concrete Structures MRepair sheetpile cap. 7. Monolith JointsMCaulk gaps in block wall. Interior Drainage System 1. Vegetation and ObstructionsMClear silt and vegetation from outlet. 5. Concrete SurfacesM Cracks on the headwall should be sealed and monitored for changes / deterioration. Pump Stations 11. Non-Mechanical Trash Racks MClean debris 37 FOR OFFICIAL USE ONLY

38. BUILDING STRONG ® Recommended Segment/System Rating 38 FOR OFFICIAL USE ONLY Segment / SystemRating Forest Ave Minimally Acceptable

39. BUILDING STRONG ® Rehabilitation Program Eligibility Determination 39 FOR OFFICIAL USE ONLY

40. BUILDING STRONG ® Rated ItemRating Levee Embankments 3. EncroachmentsA 4. Closure StructuresN/A 5. Slope StabilityA 6. Erosion/ Bank CavingA 10. Animal ControlM 11. Culverts/ Discharge PipesA 14. Underseepage Relief Wells/ Toe Drainage SystemsN/A Floodwalls 2. EncroachmentsM 3. Closure StructuresA 5. Tilting, Sliding, or Settlement of Concrete StructuresM 6. Foundation of Concrete StructuresA 8. Underseepage Relief Wells / Toe Drainage SystemN/A Interior Drainage 9. Culverts/ Discharge PipesA 10. Sluice/ Slide GatesN/A 11. Flap Gates/ Flap Valves/ Pinch ValvesA Pump Stations 17. Intake and Discharge PipelinesA 18. Sluice/ Slide GatesA 19. Flap Gates/ Flap Valves/ Pinch ValvesA 40 FOR OFFICIAL USE ONLY

41. BUILDING STRONG ® Rehabilitation Program Eligibility Determination Public sponsor provided maintenance information per the Public Sponsor Pre-Inspection FormYes Non-federal levee system meets Initial Eligibility criteriaN/A Rehabilitation Program Status System meets all interim eligibility criteria, including having received a rating of A, M,N/A or Yes for all subset items and is therefore eligible for rehabilitation assistance. Active System does not meet interim eligibility requirements.Inactive 41 FOR OFFICIAL USE ONLY