Street lights will not be included in the planned improvements. Existing street lights located on power poles will remain.
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We anticipate that the design of the planned improvements will be completed by the end of 2020. Once design is completed, the project must be publicly bid for construction and ultimately awarded by city council. This bid and award process can take between 8-12 weeks. Construction is estimated to begin in March 2021 and is estimated to take 9 months to complete.
Construction of the improvements will be phased to minimize impacts along the street as much as feasibly possible. The contractor will be required to provide local access to the street at all times during construction of the project. A suitable all-weather material will be provided in areas that street paving is removed and prior to construction of the new street pavement. There may be isolated occurrences where the contractor will need to restrict access to driveways while installing underground utilities or repaving driveways. These isolated occurrences will be coordinated with property owners during construction. Please be aware that on-street parking may not be permitted during construction to ensure that there is sufficient space for local traffic and emergency vehicles.
A 4-foot sidewalk is being provided only on one side of the street based on the very narrow right-of-way and in order to eliminate the need for additional right-of-way to be purchased by the City. Because of the residential context of these streets, a single sidewalk will provide a designated/continuous pedestrian route to surrounding streets. The location of the sidewalk depicted in the concept plan was determined based on connection to other sidewalk facilities and reducing impacts to adjacent properties.
Both streets were reviewed by the City of McKinney Arborist and have taken into account the location, size, and species of trees along Griffin Street and Pine Street in relation to the concept plan provided. This is very important since the root system and ability to withstand nearby construction for trees varies. The concept plan designates trees in the street/public right-of-way that will need to be removed during construction. Although we have made every attempt to minimize impacts to trees, in some cases it was not feasible in order to accommodate the proposed street and sidewalk. In the instance tree roots (for trees to remain) are impacted during construction, the contractor will be required to have certified personnel ensure that any required root pruning or treatments are done properly to ensure the long-term health of the tree.
The existing street/public right-of-way width on Griffin Street is only 35-40 feet compared to Pine Street which has a 50 foot wide right-of-way. In order to reduce impacts to adjacent properties, portions of Griffin Street have been proposed to be reduced from the city’s typical 26-foot wide pavement to 22-feet wide. This width still provides the ability for on-street parking on one side of the street and allows safe passing of other vehicles. A similar approach was taken previously along Cole Street where a narrow roadway was provided between Cedar Street and College Street. Although the current city standard for residential streets is 26-feet in width, a variance is considered in historical neighborhoods.
The design of the proposed improvements will provide options for both concrete and asphalt. For either option, the roadway will include concrete curbs and underground storm drainage. A summary of some considerations of each is provided below. For either option, the pavement will be designed to ensure a long serviceable life before repaving is required in the future. A determination of pavement material will be made by the Engineering Department at a later date.