Site work and paving for a civil project in Chicago, Illinois. Completed plans call for site work for a road / highway; road / highway; and water / sewer project.

The work shall consist of spot repairs to the sanitary and storm sewer systems, including approximately 75 feet of storm pipe replacement (8, 10, 15), 80 feet of sanitary pipe replacement (6, 8), 5 sanitary service line connections, 2 sanitary manholes, and 3 catch basins, at locations shown on the contract drawings or as directed by the City or City authorized representative. for a period of forty-five days after the end of the bidding period. The right is reserved to reject any or all proposals, to waive technicalities, to postpone the bid opening, or to advertise for new proposals, Question Deadline 07/05/2025 Direct questions to: Mark Moen, HBK Engineering, LLC, mmoen@hbkengineering.com DESCRIPTION The work shall consist of spot repairs to the sanitary and storm sewer systems, including replacement of 6", 8", 10" and 15" sewer pipe, 6" sewer service taps, catch basins, and manholes, at locations shown on the contract drawings or as directed by the City or City's authorized representative. GENERAL 1. The term "City" shall mean City of Chicago Heights, its personnel, and authorized representatives. 2. The term "Engineer" shall mean HBK Engineering, LLC and its personnel. 3. The Contractor shall be responsible for locating all manholes and drainage structures. In some instances, the lid of the manhole may be buried and require locating with a metal detector or ground probe. 4. The Contractor shall coordinate the locating of all utilities within the project area by utilizing the 811 One Call System (JULIE 800-892-0123). Excavation shall not be performed until all utilities have been marked or cleared the dig ticket. 5. The Contractor shall take care not to cause or compound damage to either existing sewer lines or sewer manholes/structures to remain during repair operations. Any damage caused by the Contactor shall be repaired solely at the Contractor's expense and to the standards of the City. CONSTRUCTION REQUIREMENTS Traffic Control and Protection: Traffic control and protection shall be provided to maintain through traffic during repair operations and shall furnish all necessary signs, markings, traffic control devices, and flagmen as may be required to maintain a safe work zone. The Contractor shall follow applicable IDOT and Manual of Uniform Traffic Control Devices for Streets and Highways standards. The Contractor shall install "No Parking" signs 24-48 hours in advance of televising operations which require closing parking lanes to maintain through traffic. "No Parking" signs shall have dates and times of restrictions clearly written. The Contractor shall submit a sample of the "No Parking" sign to the City for approval before installing signs. The Contractor shall furnish and install "No Parking" signs. Signs shall be taped or tied to trees and streetlights. Stapling of signs to trees is prohibited. "No Parking" signs shall be taken down at the end of each work day for locations where work has been completed. Clearing: Clearing shall consist of the removal and disposal of all obstructions such as accumulations of rubbish of whatever nature, all logs, shrubs, bushes, saplings, grass, weeds, other vegetation and stumps of a diameter less than 6 in. Clearing of trees with a single main stem or trunk diameter of 6 in. or greater is not included in this work. The Contractor shall notify the City if trees will obstruct construction of the sewer repairs. The City will coordinate with the Contractor or a third party for the removal of trees. Saw Cutting: The limits of removal of any driveways, pavement, curb, sidewalk, etc. shall be saw cut. Contractor shall limit removal to only the area reasonably necessary to conduct excavation and sewer repairs. This work will not be paid for separately but shall be included in the unit price bid for the applicable pay items. Excavation: The limits of excavation in paved areas shall be saw cut. Removal and disposal of all excavated materials, including pavement, sewer piping and sewer structures, shall be in accordance with governing regulations. Anticipated depth of excavation, when known, is indicated in the Pay Items. When depth of excavation is not known it will be noted as "Assumed". Work shall be in accordance with IDOT Standard Specifications Section 550 "Storm Sewers" and Section 602 "Catch Basin, Manhole, Inlet, Drainage Structure, and Valve Vault Construction, Adjustment, and Reconstruction". Safety measures in accordance with OSHA Safety and Health Regulations for Construction, appropriate for the depth of excavation, shall be employed. Backfilling: Sewer Work shall be in accordance with IDOT Standard Specifications Section 550 Storm Sewers and as described herein. Bedding, haunching and initial backfill for sewer pipe shall be aggregate of IDOT gradation CA-11 and placed as shown in the Installation Detail included in the Exhibits section herein. Final backfill shall be aggregate of CA-6 gradation. Bedding shall be placed and spread evenly in the bottom of the trench. Aggregate shall be tamped to ensure all voids in the trench bottom are filled with stone. After installation of pipe, place haunching stone to the spring line of the pipe. Tamp aggregate to work stone into area beneath pipe and against trench wall. Place initial backfill on top of haunching stone and pipe to a depth of 12 inches above the crown of the pipe. Level the top of the initial backfill and tamp down to fill voids in trench wall and ensure full encasement of the pipe. Care shall be taken to not drop stone directly on top of PVC pipe when depositing haunching and initial backfill aggregate into the trench. Stone should be dumped in the gap between the pipe and the trench wall. Final backfill shall be placed in lifts of 9 to 12 inches in depth. Compact each lift with a vibratory plate compactor until aggregate is consolidated and surface is firm. Final backfill shall be placed until the trench is filled to the same elevation as the adjacent pavement. Excavated earth may be used for final backfill when sewer trench is not in or within 2 feet of pavement. Manholes and Drainage Structures shall be in accordance with IDOT Standard Specifications Section 602 Catch Basin, Manhole, Inlet, Drainage Structure, and Valve Vault Construction, Adjustment, and Reconstruction and as described herein. The space between the sides of the excavation and the outer surfaces of the drainage structure shall be backfilled with sand or stone screenings. The backfill shall be compacted according to Article 550.07. If sufficient room is not available between structure and sides of excavation to properly compact backfill, aggregate of gradation CA-7 may be substituted for sand or screenings and tamped into place in lifts no greater than 12" thick. The final 12 inches of backfill shall be aggregate of gradation CA-6 and compacted in accordance with Article 550.07, Method 1 to 95% of standard lab density. Final backfill shall be placed until the excavation is filled to the same elevation as the adjacent pavement. PVC Pipe: Sewer pipe shall be polyvinyl chloride (PVC) gasketed gravity sewer pipe meeting ASTM D-3034 standards with dimension ratio of SDR-26 for pipe smaller than 18" diameter. Pipe 18" diameter and larger shall meet ASTM F679 standards and have a PS 115 stiffness rating. Pipe shall be solid wall with integral bell. Gasket joint shall meet ASTM D-3212 standards. Installation shall be in accordance with ASTM D-2321. Pipe Couplings: New sewer pipe shall be joined to existing pipe through the use of flexible pipe coupling consisting of an elastomeric sleeve incorporating corrosion resistance tension bands and a tightening mechanism. Coupling shall meet ASTM Standard C-1173 and be able to join pipes of dissimilar materials. Coupling shall be manufactured by Fernco Inc., Mission Rubber Company, or other manufacturer approved by the City or Engineer. Existing pipe material expected to be encountered includes vitrified clay, concrete, reinforced concrete and PVC. Connection to Sewer Structure: INLET: New pipe shall be connected to inlets by inserting the pipe through the opening in the structure wall so that the pipe extends no further than 3 inches into the interior of the inlet. The pipe shall rest on the interior bottom of the structure. The void between the pipe and the structure wall shall be filled with a double course of brick and mortar. Smooth the mortar around the pipe so that it blends to the interior wall of the inlet. CATCH BASIN: New pipe shall be connected to catch basins by inserting the pipe through the opening in the structure wall so that the pipe extends 3 to 6 inches into the interior of the catch basin. The pipe shall be supported in the opening by sewer brick and shall not rest on the structure wall. The void between the pipe and the structure wall shall be filled with a double course of brick and mortar. Smooth the mortar around the pipe so that it blends to the interior wall of the catch basin. MANHOLE: When new pipe connects to manholes, install pipe by one of the following methods: Storm Sewer 1. If pipe enters storm manhole at invert elevation of the structure: insert pipe through existing opening in the structure wall so that it meets the invert of the manhole and extends into the manhole 3 to 6 inches. Support pipe with sewer brick as necessary to match invert of pipe to manhole invert. Fill the void between the pipe and the structure wall with a double course of brick and mortar. Smooth the mortar around the pipe so that it blends to the interior wall of the manhole. 2. If pipe enters storm manhole at elevation above invert of the structure: connect pipe in same manner as connecting to a catch basin. Sanitary Sewer 3. If pipe enters sanitary manhole at invert elevation of the structure: insert pipe through existing opening in the structure wall so that it meets the invert of the manhole and extends into the manhole 3 to 6 inches. Support pipe with sewer brick as necessary to match invert of pipe to manhole invert. For cast concrete manholes, provide flexible connector to seal gap between pipe and manhole. For masonry manholes fill the void between the pipe and the structure wall with a double course of brick and mortar. Smooth mortar around the pipe so that it blends to the interior wall and benching of the manhole. 4. If pipe enters sanitary manhole at elevation up to 24" above invert of the structure, connect pipe in same manner as Method 3 with the exception that the new pipe does not need to meet the invert elevation of the manhole. 5. If pipe enters sanitary manhole at elevation greater than 24" above invert of the structure, install external drop connection. Drop connection must be approved by Engineer prior to installation. Manholes, Inlets and Catch Basins: Structures shall be precast reinforced concrete in accordance with IDOT Standard Specifications Section 602 Catch Basin, Manhole, Inlet, Drainage Structure, and Valve Vault Construction, Adjustment, and Reconstruction and as described herein. Diameter and depth of structure shall be as noted in Pay Item description and/or as noted on drawings. In order to permit the joints to be mortared properly and to permit proper compaction of the backfill material, the excavation shall be made to a diameter of at least 6 inches greater than the diameter of the structure. Connect pipe to structure in manner as described herein in article "Connection to Sewer Structure". Provide frames and lids in accordance with Section 604 Frames, Grates and Median Lids and as detailed herein, as noted in Pay Item description and/or on drawings. Provide lid as specified in Pay Item description. Open lids located within crosswalks or marked bike lanes shall be ADA compliant. Service Lateral Connection: Where service laterals are connected to sewer main identified to be replaced a new connection shall be provided. The contractor shall provide a new PVC wye or tee fitting of size to match the sewer main and service lateral. Sanitary service lines are assumed to be 6-inch diameter. Storm service lines are assumed to be 8-inch diameter. Fitting shall be PVC and in accordance with PVC pipe specification herein. Sufficient new PVC pipe shall be provided to connect the wye/tee fitting to the existing service lateral pipe. Connection to existing pipe shall be through use of flexible pipe couplings as specified herein. Aggregate Materials: Aggregate material used for backfill of trenches and structures shall be new material in accordance with IDOT Section 1004 Coarse Aggregates and of the following specification: IDOT Gradation CA-11 - Sewer pipe bedding, haunching and initial backfill IDOT Gradation CA-6 - Sewer pipe and structures final backfill IDOT Gradation CA-7 - Manholes, inlets and catch basins initial backfill (when sand or screenings cannot be used)