154th Reconstruction Project – Addendum 1

Addendum 1 Bid Number: 2024-04-12 For 154th STREET RECONSTRUCTION PROJECT Date of Bid Advertisement: April 3, 2024 Bid Due Date: April 19, 2024 Bid Due Time: 10:00am Central Time Revised Bid Due Date: April 26, 2024 Revised Bid Due Time: 10:00am Central Time City of Harvey 15320 Broadway Avenue Harvey, IL 60426 Phone: 708-210-5300 Email: procurement@cityofharveyil.gov 154TH STREET RECONSTRUCTION PROJECT Addendum 1 Summary of Addendum 1: 1. Response to Contractor Questions enclosed. 2. Enclosed is the updated demolition plan sheets and updated storm plan and profile sheets. 3. Updated Bid Form with the addition of: a. Tree Root Pruning and Treatment b. Temporary Patching c. The signs broken down to type and pay item of each. d. ASTM C-923 Rubber Boot e. Concrete Washout f. Temporary Construction Entrance g. Sod 4. Update to the Bid Form with changes in quantities to: a. Removing existing light poles and traffic signal

bases b. Combined Sewer Removal c. Manholes Type A, 4’ Diameter d. Manholes Type A, 6’ Diameter e. Storm Sewers, Class A, Type 1, 12”, 18”, 24” and 36” 5. Attached is the geotechnical report and pavement cores report. 6. Bid Due Date has been revised to Friday, April 26, 2024. Response to Contractor Questions Bid Number: 2024-04-12 For 154th STREET RECONSTRUCTION PROJECT Date of Bid Advertisement: April 3, 2024 Bid Due Date: April 19, 2024 Bid Due Time: 10:00am Central Time Revised Bid Due Date: April 26, 2024 Revised Bid Due Time: 10:00am Central Time City of Harvey 15320 Broadway Avenue Harvey, IL 60426 Phone: 708-210-5300 Email: procurement@cityofharveyil.gov 154TH STREET RECONSTRUCTION PROJECT Response to Contractor Questions 1. When is the completion date? Constructed in 2024. 2. Please give more information on the sizes of the plantings? The sizes are on sheet L1.5. They are either a number 1 container pot or a 4-cell tray. 3. Can you give more detail on the electric pole removal? Foundation removal? Conduit / wire removal? Sawcut remaining electrical pole base to be flush with the sidewalk. The wiring has already been removed. Do not need to remove the foundations. 4. How is landscape restoration being paid for? What will be required to be replaced (Seed? Sod?). To what extent will the restoration be done in the parkways? a. If landscaping is disturbed during construction then it will need to be replaced. b. Replace with sod. c. Quantities of sod have been added to the bid form. 5. Who is doing the layout for the project? City of Harvey will coordinate construction staking. 6. Are CAD Files available? CAD files will be given to the awarded contractor if requested. 7. What is meant by Washed CA-6? This line item description has been revised to 12” aggregate base course IDOT CA-6. 8. Intersections will need to be closed at some point during construction. How many can be closed at the same time? No more than 2 consecutive intersections can be closed at a time. 9. How will CCDD Testing Be handled? Has any testing been done? No testing has been done. The contractor is responsible for CCDD testing. 10. How will Undercuts in the base (if necessary) be handled? Undercuts in the base are not anticipated at this time. If undercuts are necessary, that may be addressed with a change order. Included in this response is the geotechnical report and pavement cores. 11. The binder will be placed in phases and the surface course will be placed at the end in one mobilization? Yes that is anticipated. 12. Can we get a cross section of the proposed curb with required reinforcement? The curb with reinforcement is required adjacent to concrete pavement per detail on sheet C-70. 13. Who is the “By Others” that are removing the Storm Structures? What extent will this be completed? a. There are no longer removed storm structures by others. b. The demolition plans and proposed storm plans have been revised as part of the addendum. 14. Do you have any cores of the existing conditions? The geotechnical report and pavement cores are issued in this addendum. 15. What storm structures are to be cleaned? All storm structures within the project limits. 16. Does any storm sewer pipe need to be cleaned? No. 17. Is the quantity given for the sign panels, correct? The quantity for sign panels has been revised to Each. 18. Is Inlet Protection and Silt Fence the only Erosion Control required? Concrete Washout Area has been added to the bid form. Temporary Construction Entrance has been added to the bid form. 19. What will be required for Soil Compaction and Testing? Will monitoring be required? Possible pay items? Subgrade to be compacted to 95% proctor under proposed pavement or as approved by the Construction Engineer. This is not the responsibility of the contractor. 20. Pay item for structure / water valve adjustments? Added pay item to the bid form. 21. Are there any foundations or other buried obstacles that are in the excavation area? Some of the existing road has brick below it. But no other foundations or buried obstacles are known. 22. How will contaminated soil be handled if encountered? Contaminated soil must be disposed of according to State and Federal requirements. 23. What is required for temporary access? How will it be paid for? Temporary construction entrance has been added as a pay item. Preferred location for temporary construction entrance will be determined at the pre- construction meeting. 24. How will tree root pruning and treatment be paid for? A pay item has been added for this. 25. How will temporary patching be paid for? A pay item has been added for this. 26. Any sidewalk or detectable warnings on the project? No. Any damage to existing sidewalks is to be replaced at the cost of the contractor. 27. Is the engineered soil in the bid form for the bumpouts the same as the soil media mix on plan sheet C-77? Yes this is the same. The bid form has been updated to say Soil Media Mix. 28. Is there seeding in the rain gardens? No there is no seeding in the rain gardens. Just the plants, rocks and mulch. APPENDIX D. BID FORM ADDENDUM 1 4/15/2024 Item no. Description Unit Unit Price Quantity Total GENERAL 1 MOBILIZATION L SUM 1 2 TRAFFIC MAINTENANCE L SUM 1 DEMOLITION 3 CURB & GUTTER REMOVAL LF 6503 4 SAWCUT PAVEMENT LF 1810 5 CONCRETE REMOVAL SQ YD 191 6 SOIL REMOVAL CU YD 1049 7 FULL-DEPTH PAVEMENT REMOVAL SQ YD 23124 8 REMOVING MANHOLES/CATCH BASINS EACH 26 9 REMOVE EXISTING LIGHT POLES AND TRAFFIC SIGNAL BASES EACH 8 10 COMBINED SEWER REMOVAL LF 204 11 TREE ROOT PRUNING AND TREATMENT EACH 12 12 TEMPORARY PATCHING L SUM 1 NEW CONSTRUCTION Roadway 13 HOT-MIX ASPHALT SURFACE COURSE, 1.5", N50 TON 1844 14 HOT-MIX ASPHALT BINDER COURSE, 2.5" N50 TON 3073 15 12" AGGREGATE BASE COURSE, IDOT CA-6 TON 11064 16 BITUMINOUS MATERIALS (TACK COAT) GAL 3319 General Subtotal: Demolition Subtotal: Page 1 of 4 17 BITUMINOUS MATERIALS (PRIME COAT) GAL 8852 18 B-6.12 CURB & GUTTER (INCL. DEPRESSED) LF 7656 19 PORTLAND CEMENT CONCRETE DRIVEWAY PAVEMENT, 8 INCH SQ YD 152 20 THERMOPLASTIC PAVEMENT MARKING - LETTERS AND SYMBOLS SQ FT 360 21 THERMOPLASTIC PAVEMENT MARKING - LINE 4" LF 9340 22 THERMOPLASTIC PAVEMENT MARKING - LINE 12" LF 2562 23 THERMOPLASTIC PAVEMENT MARKING - LINE 24" LF 475 24 METAL POST - TYPE A FOOT 588 25 SOD SY 1555 26 STOP SIGN EACH 21 27 SPEED LIMIT EACH 4 28 BIKE SIGN EACH 44 29 ONE WAY EACH 14 30 DO NOT ENTER EACH 7 Drainage 31 CATCH BASINS, TYPE A, 4'-DIAMETER, TYPE 12 FRAME AND GRATE EACH 43 32 MANHOLES, TYPE A, 4'-DIAMETER, TYPE 1 FRAME, CLOSED LID EACH 22 33 MANHOLES, TYPE A, 6'-DIAMETER, TYPE 1 FRAME, CLOSED LID EACH 6 34 DROP MANHOLE EACH 4 35 EXISTING STRUCTURE ADJUSTMENT EACH 20 36 ASTM C-923 RUBBER BOOT EACH 20 37 STORM SEWER, 8" PVC PIPE LF 35 38 STORM SEWERS, CLASS A, TYPE 1, 12" LF 160 Roadway Subtotal: Page 2 of 4 39 STORM SEWERS, CLASS A, TYPE 1, 18" LF 912 40 STORM SEWERS, CLASS A, TYPE 1, 24" LF 1560 41 STORM SEWERS, CLASS A, TYPE 1, 36" LF 160 Bumpouts 42 EARTH EXCAVATION AND HAULOFF CU YD 1785 43 SOIL MEDIA MIX CU YD 460 44 PIPE UNDERDRAINS 4" (SPECIAL) LF 765 45 UNDERDRAIN CAPS EACH 20 46 UNDERDRAIN CLEANOUT EACH 10 47 WOVEN GEOTECHNICAL FABRIC SQ YD 2350 48 AGGREGATE BASE COURSE - CA-7 TON 1360 49 RIPRAP CU YD 26 50 River Rock CU YD 38 51 Granite Boulders SF 738 52 Butterfly Weed EACH 228 53 Purple Poppy Mallow EACH 84 54 Side-oats Grama EACH 268 55 White Tinged Sedge EACH 367 56 Common Wood Sedge EACH 334 57 Cool as Ice Fescue EACH 309 58 Prarie Smoke EACH 237 59 Variegated Lilyturf EACH 396 60 Prairie Petunia EACH 167 Drainage Subtotal: Page 3 of 4 61 Aromatic Aster EACH 64 Erosion Control 62 INLET PROTECTION EACH 92 63 CONCRETE WASHOUT EACH 1 64 TEMPORARY CONSTRUCTION ENTRANCE EACH 1 65 SILT FENCE LF 4105 Grand Total: Erosion Control Subtotal: Bumpouts Subtotal: Page 4 of 4 8 W. COLLEGE DR. ● SUITE C ● ARLINGTON HEIGHTS, IL 60004 SOIL BORINGS ● SITE INVESTIGATIONS ● PAVEMENT INVESTIGATIONS ● GEOTECHNICAL ENGINEERING TESTING OF ● SOIL ● ASPHALT ● CONCRETE ● MORTAR ● STEEL March 20, 2023 File No. 27076 Mr. Jeffery Ekegren The Antero Group, LLVC 1631 W. Walnut Street, 2nd Floor Chicago, IL 60612 Re: Geotechnical Investigation 154th Street Harvey, Illinois Dear Mr. Ekegren: We are submitting our report for the subsurface investigation completed along 154th Street between Ashland Avenue and Lexington Avenue in the City of Harvey, Illinois. The investigation was requested to determine current subsurface soil and water conditions at select boring locations. The findings of the field investigation and the results of laboratory testing are intended to assist in the planning, design, and construction of the proposed green infrastructure. SCOPE OF THE INVESTIGATION The field investigation included obtaining 8 borings at the locations requested and as indicated on the enclosed location sketches. The boring locations were established using field taping methods and accuracy. We auger drilled the 8 borings to depths of 7.5 feet below existing surface elevations. Soil samples were obtained using a split barrel sampler advanced utilizing an automatic SPT hammer. Soil profiles were determined in the field and soil samples returned to our laboratory for additional testing including determination of moisture content. Cohesive soils obtained by split barrel sampling were tested further to determine dry unit weight and unconfined compressive strength. The results of all field determinations and laboratory testing are included in summary with this report. RESULTS OF THE INVESTIGATION Enclosed are boring logs indicating the soil conditions encountered at each location. Site surface conditions include pavement materials, vegetation, topsoil and fill soil conditions. The topsoil is classified as dark brown to black silt/clay mixtures with traces of roots usually present. Fill soil conditions were encountered at each of the borings with the exception of B-5. Composition of the fill includes the presence of silt/clay/sand, topsoil, and silt/clay mixtures extending to depths of 1.0 feet to 3.0 feet at these boring locations. The limits of fill placement File No. 27076 Page 2 Re: 154th Street Harvey, Illinois were not determined within the scope of this investigation. Larger debris may also be present within the fill but was not encountered during the investigation. Underlying natural soil conditions consist primarily of cohesive soils. These are classified as tough to very hard clay/silt mixtures with lesser portions of sand and gravel. A thin seam of non- cohesive soils was also encountered as indicated at boring B-8. These include loose silt/clay mixtures in a very damp condition. Cobbles and boulders may be present within the site soils at any elevation, although none were encountered while drilling. SUBSURFACE WATER The boring logs indicate subsurface water was not encountered in the bore holes at the time of the drilling operations and during the period of these readings. It is expected that fluctuations from the water levels recorded will occur over a period of time due to variations in rainfall, temperature, subsurface soil conditions, soil permeability and other factors not evident at the time of the water level measurements. SOIL INFILTRATION RATES We understand the proposed new green infrastructure improvements may include some infiltration planned at an approximate depth of 4.0 feet below existing grades. Grain-size analysis testing was performed on selected samples of naturals soils encountered at each of the borings to determine USDA soil classifications and estimated infiltration rates. The grain size analysis determinations and estimated infiltration rates are shown in the below table: Boring Depth USDA Soil Classification Estimated Infiltration Rate B-1 3.5’ to 5.0’ Silt Loam 0.13 inches per hour B-2 3.5’ to 5.0’ Silty Clay Loam 0.19 inches per hour B-3 3.5’ to 5.0’ Silty Clay 0.07 inches per hour B-4 3.5’ to 5.0’ Clay Loam 0.03 inches per hour B-5 3.5’ to 5.0’ Silty Clay 0.07 inches per hour B-6 3.5’ to 5.0’ Silty Clay Loam 0.19 inches per hour B-7 3.5’ to 5.0’ Silty Clay 0.07 inches per hour B-8 3.5’ to 5.0’ Silty Clay 0.07 inches per hour Estimated design infiltration rates were taken from Table 3-1 of City of Chicago Stormwater Ordinance Manual. CONCLUSION The information within this report is intended to provide initial information concerning subsurface soil and water conditions on the site. Variations in subsurface conditions are expected to be present between boring locations due to naturally changing and filled soil conditions. Our understanding of the proposed improvements is based on limited information available to us at the writing of this report. The findings of the investigation and the recommendations File No. 27076 Page 3 Re: 154th Street Harvey, Illinois presented are not considered applicable to significant changes in the scope of the improvements or applicable to alternate site uses. We recommend that proposed landscape plans be reviewed by our office to determine if additional considerations are necessary to address anticipated subsurface conditions. If you have any questions concerning the findings or recommendations presented in this report, please let me know. Very truly yours, SOIL AND MATERIAL CONSULTANTS, INC. Thomas P. Johnson, P.E. David Rak, E.I.T. President Project Engineer TPJ:ek Enc. cc: Ms. Liz Chipp, P.E. – The Anterio Group, LLC N SSMMCC SOIL AND MATERIAL CONSULTANTS, INC. LOCATION SKETCH Client: THE ANTERO GROUP Project: 154TH STREET Location: HARVEY, ILLINOIS File No. 27076 Date: 3-15-23 Scale: NONE B-1 B-2 B-3 B-4 LizChippPE Callout 6.5 feet to groundwater LizChippPE Text Box All other borings more than 7.5 feet to groundwater N SSMMCC SOIL AND MATERIAL CONSULTANTS, INC. LOCATION SKETCH Client: THE ANTERO GROUP Project: 154TH STREET Location: HARVEY, ILLINOIS File No. 27076 Date: 3-15-23 Scale: NONE B-5 B-6 B-7 B-8 LizChippPE Callout 6.0 feet to groundwater 8 W. COLLEGE DR. ● SUITE C ● ARLINGTON HEIGHTS, IL 60004 SOIL BORINGS ● SITE INVESTIGATIONS ● PAVEMENT INVESTIGATIONS ● GEOTECHNICAL ENGINEERING TESTING OF ● SOIL ● ASPHALT ● CONCRETE ● MORTAR ● STEEL June 23, 2021 File No. 25896 Ms. Annie Makuch The Antero Group, LLC 1212 N. Ashland Avenue Chicago, IL 60622 Re: Pavement Investigation 154th Street from Wood Street to Park Avenue Harvey, Illinois Dear Ms. Makuch: We are submitting the results of our pavement investigation completed along 154th Street from Wood Street to Park Avenue in the City of Harvey, Illinois. The investigation was requested to determine existing pavement sections. The field investigation included obtaining 12 pavement cores at the requested locations. The pavement materials were returned to our laboratory for identification and thickness verification. The results are included in the summary with this submittal. Enclosed are core logs indicating the pavement conditions encountered at each location. The summary table below indicates pavement materials and thicknesses encountered at each location. Please refer to the individual core logs and pictures for more detailed information. Core Total HMA (in.) Paver Brick (in.) Portland Cement Concrete(in.) Granular Base (in.) Total Pavement (in.) 1 3.75 --- 12.25 3.75 19.75 2 3.0 3.75 --- 13.0 19.75 3 5.0 --- --- 12.0 17.0 4 3.5 3.75 --- 11.25 18.5 5 3.75 3.75 --- 11.75 19.25 6 3.5 3.5 --- 5.0 12.0 7 2.75 3.75 --- 8.75 15.25 8 9.5 --- --- 9.0 18.5 9 5.5 3.75 --- 11.75 21.0 10 5.0 3.75 --- 10.25 19.0 11 6.25* 3.75 --- 13.0+ 23.0+ 12 3.5 3.75 --- 14.25 21.5 Note: Failures noted in the pavement materials have the thicknesses shown in bold. Granular base contaminated with clay have the thicknesses shown in bold. The presence of bituminous treated aggregate is indicated by (*). File No. 25896 Page 2 Re: 154th Street from Wood Street to Park Avenue Harvey, Illinois If you should have any questions concerning the enclosed information, please feel free to contact our office at anytime. Very truly yours, SOIL AND MATERIAL CONSULTANTS, INC. Justin Seligson, E.I.T. Thomas P. Johnson, P.E. Project Engineer President JMS:TPJ Enc. N SSMMCC SOIL AND MATERIAL CONSULTANTS, INC. LOCATION SKETCH Client: THE ANTERO GROUP, LLC Project: 154TH ST. - WOOD ST. to PARK AVE. Location: HARVEY, ILLINOIS File No. 25896 Date: 6-10-21 Scale: NONE C­1 C­2 C­3 C­4 N SSMMCC SOIL AND MATERIAL CONSULTANTS, INC. LOCATION SKETCH Client: THE ANTERO GROUP, LLC Project: 154TH ST. - WOOD ST. to PARK AVE. Location: HARVEY, ILLINOIS File No. 25896 Date: 6-10-21 Scale: NONE C­5 C­6 C­7 C­8 N SSMMCC SOIL AND MATERIAL CONSULTANTS, INC. LOCATION SKETCH Client: THE ANTERO GROUP, LLC Project: 154TH ST. - WOOD ST. to PARK AVE. Location: HARVEY, ILLINOIS File No. 25896 Date: 6-10-21 Scale: NONE C­9 C­10 C­11 C­12