AgdaPkt 2006-02-27 - Laserfiche WebLink

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The project proceeded block by block through the target area. The contractor performed 6.1 C sidewalk repairs at all locations where sidewalk and curb and gutter defects exceeded one- Page 2 inch in deviation. Wheel chair ramps were constructed at intersection corners within the project area. All repairs were made with the retention of existing healthy street trees as the primary focus. Retention of trees during concrete sidewalk repair requires root pruning to construct the concrete sidewalk to City standards. In many instances, root pruning at the City's target distance of 36-inches from the tree trunk could not be performed within the limited public right-of-way space available. In order to provide adequate space between the tree and newly constructed sidewalk, sidewalk maintenance easements were requested and granted by property owners. These easements allow the public sidewalk to be placed on private property. During the course of this project, the amount of root pruning performed to the street trees was questioned as a viable tree preservation practice. Staff was asked if it was possible to perform sidewalk repairs without root pruning and provide their findings to Council. Public Works Services staff coordinated with Community Development Services staff to approve the installation of rubber sidewalk panels as an acceptable sidewalk material. The flexible rubber panels are less than two inches thick and do not require the extensive root removal necessary under concrete sidewalk construction. Staff also tested the installation of a poured-in-place rubber material which also requires less root removal. The project was completed to City standards. All root pruning was performed following the direction of the City's project inspector. There were three locations where the contractor performed root pruning work that was not directed by City staff. Those locations were the result of miscommunication by the contractor's crew. Those sites have been resolved with the contractor per the contract specifications. During this project, the following repairs were completed: . 330 total sidewalk repair sites . 2 trees removed following project . 36 access (wheel chair) ramps . 64 easements granted . 102 trees root pruned . 91 Rubber sidewalk sites . 10 trees removed during project . 2 Poured in place rubber . 61 trees planted sidewalk sites A companion staff report, Tree Failure Data Analysis, is included on this meeting agenda, which provides information about the City's experience with tree failures related to root pruning. Alternatives 1. Do not approve the change order for the work that was completed. The amount of work is a small percent of the total project and staff was working within the neighborhood to complete the sites along a street and without stopping the project in the middle of a block and without refusing to perform additional repairs requested by the property owners. 2. Do not to accept the project and do not release the retention. Staff believes that all known requests for punch list items have been corrected. The work should be accepted. Page 2 of 3 - ---< .". __. "h _. - -. .~.. . ... ".--. . ~.___ __..._______.__.n___..._._____.___ .- - --.--