Concrete Sidewalk Repairs & Installation - 2023

Sidewalk Repairs 2023 The City of Three Rivers reserves the right to reject any and all bids, waive informalities or defects in a bid, or accept a bid it shall deem to be in the best interest of the City. The City does not discriminate on the basis of race, color, national origin, sex, religion, age or disability in employment or the provision of services. The City has local preference guidelines It is anticipated that the contract will be awarded at the March 7, 2023 Commission meeting with work commencing on or after April 1, 2023. A. The Contractor shall be responsible for all necessary barricades. He shall have a sufficient number of barricades on the job to direct traffic (either pedestrian or driven) around the newly poured concrete. A piece(s) of caution tape are not considered to be barricades and are not acceptable as barricade substitutes. B. If necessary the Contractor shall provide continuous on-site inspection of the newly poured concrete until it is set to a point beyond potential damage by vandals. C. The work will consist of saw cutting and/or removing existing concrete, asphalt, topsoil, tree roots or other objects in the way of the designated line and grade of the proposed concrete. Work also includes layout of new sidewalk (with coordination from the City) including any tree or brush trimming to remove obstacles. D. The Contractor shall be responsible for having a mechanical plate tamper on-site and he shall firmly compact each surface upon which concrete is to be poured with that tamper. The Contractor shall saw cut existing concrete edges as indicated at each job site. Broken existing edges shall not be acceptable. The City shall provide bank run sand fill at the City yard for the Contractor's use. The Contractor shall notify the City if the supply is getting low so we can replenish it before running out. E. The prepared base for the concrete shall be granular material. No admixture of clay, silt or topsoil shall be allowed as a base material. The Contractor shall assure that a minimum 3" base is in place over all objects including tree roots. Such 3" granular barrier shall also be in place laterally between all tree roots and concrete sidewalk. No roots may remain closer than 3" to the bottom or sides of the concrete to be poured. F. All concrete poured shall be full depth, 4", 6" or 8". Use of 2" x 4" or 2" x 6" lumber is acceptable as form material so long as full depth concrete is poured within those forms. All concrete sidewalks shall be edged along the outside edges and jointed perpendicular to those outside edges. Joints shall be 1/4 the depth of the concrete. No jointer or edger lines shall show on the surface of the concrete other than the radiused joint lines and edges. Joints shall be so located that the sidewalk shall be divided into square blocks, i.e. 4' wide sidewalk shall have joints every 4'. 5' sidewalk shall have joints every 5' etc. Failure to evenly space the joints or placement of joints which are not straight or perpendicular to the sidewalk edges shall be cause for the contractor to remove and replace the walk at their expense. Saw cutting of joints is allowable if such cutting is straight, 1/4 the depth of the concrete poured, perpendicular to the length of the sidewalk, and completed within 24 hours of the time of the pour. The Contractor shall place an expansion joint at the beginning of each pour against the existing sidewalk and every 200 LFT of continuous sidewalk pour thereafter. The Contractor shall screed, bull float or mag float, trowel and broom all concrete laid. Failure to perform all of the above operations in order, or finished concrete which displays a "rippled" surface which indicates insufficient finish shall be cause for removal and replacement at contractors cost. G. The Contractor shall broom finish the surfaces of all concrete poured. He shall then apply white cure to the surface as soon as brooming is completed. He shall not wait until the end of the day to begin curing all concrete placed that day! The cure shall be sprayed on in an even continuous coat. A speckled surface is not acceptable. The Contractor shall provide an identification label from each barrel or container of concrete cure used to the City's representative. H. Concrete shall be 5-1/2 bag limestone, redi-mix concrete. The Contractor shall be responsible for protection of the concrete from weather and vandalism. The City shall not pay for any concrete with any words or letters or symbols written in it or other disfigurements and shall expect the Contractor to replace all such damaged sections at his cost. The Contractor and City shall "measure up" the sidewalk together in order to initiate an invoice. I. The Contractor shall perform all restoration along the newly installed sidewalk. He shall rake out the native soil as well as haul and install topsoil, as provided by the City at the City yard to a smooth surface which is flush with the concrete surfaces as installed. The Contractor shall notify the City if the supply is getting low so we can replenish it before running out. He shall also remove and dispose of all broken concrete and redi-mix truck cleanout at all locations. He shall place Sunny Lawn Mix grass seed at the recommended rate (200#/acre) and rake that seed into the prepared surfaces, he shall then mulch those surfaces with straw or hay. J. Restoration at driveways - if a driveway is of a material other than asphalt or concrete, restore with like material. This can be accomplished by saving the material removed for the sidewalk, if new install, or purchasing new if a replacement sidewalk. K. The Contractor shall only remove and replace concrete sidewalk or other flatwork which has been marked for removal with pink (or other agreed-upon color) paint by the City. Similarly he shall not install new concrete sidewalk at any location unless the location is marked for such installation. L. Approximately 6,000 square feet of sidewalk of 4", 6" and 8" depths shall be poured citywide per year, along with various curbs, ADA ramps, and driveway approaches. This amount may be increased or decreased during the year. This Contract shall terminate December 31, 2024. The Contractor shall guarantee his bid prices until that date. The Contractor shall provide "Waivers of Lien" for subcontractors and suppliers to the City at the end of November of each year of the contract. Such waivers are required in order for the City to release the 10% retention payment. M. Work will also include sidewalk and driveway flat work at utility repairs. The sidewalk and/or driveways are removed for utility repairs, and contractor will be responsible for replacing the walkway or driveway. This will be part of the remove and replace bid item, but work may be separate from the city-wide sidewalk work and contain small quantities. N. Work will as well include removal and replacement of curb or curb and gutter at ADA ramps. This may also include removing a small portion of asphalt roadway to accommodate the curb removal. Curb installation price shall include filling the asphalt removed area with concrete to within 2" of the surface. The City will pay for the asphalt patching under a separate contract. ADA ramps and plates are also line items included in this project. The City requires the use of EJ ADA plates. O. The City shall not pay for cold weather protection or cold weather additives to the concrete. All work shall be completed prior to the necessitated use of these items. The Contractors shall in general be required to have installed or begun installation of assigned jobs within one month of the receipt of the City's Work Orders, and all City work shall be completed and billed to the City by November 30 of each year. P. The Contractor shall have a mechanical, motorized, walk-behind stump & root grinder on the job with each crew at all times. Failure to have and use the grinder to clear tree roots shall be deemed sufficient cause for the Engineer to require Contractor to leave the job until he has the required equipment. Such lost time shall be at the Contractor's expense. If you have any questions, please contact Amy Roth at (269) 273-1845, aroth@threeriversmi.org.

Division 31 -	Earthwork, Earthwork Methods.
Division 32 -	Exterior Improvements, Bases, Ballasts, and Paving, Flexible Paving, Asphalt Paving, Rigid Paving, Concrete Paving, Curbs, Gutters, Sidewalks, and Driveways.