Sugar Mountain's Street Resurfacing Evaluation
Partnering With Sugar Mountain To Prepare For Pavement Repairs
The Wooten Company was asked by the Village of Sugar Mountain to investigate and evaluate the condition of approximately 2/3 of the Village’s streets identified for repair/resurfacing in 2016 by the Village. The Wooten Company was asked to evaluate the condition of the streets, prepare preliminary recommendations for design, and to prepare preliminary cost estimates for the work. Additionally, the Village requested The Wooten Company to provide an initial assessment of the existing corrugated metal pipe (CMP) culverts that were within the pavement evaluation study area.
The Wooten Company staff performed a visual field survey of the identified streets. The inspection of the streets identified areas of concern and approximate measurements of distresses recommended to be repaired. The locations and sizes of the deficiencies were transferred to available mapping to provide a visual representation of the findings. Investigations were also conducted on options for repairing existing culvert pipes and design was performed for approximately 18 culverts ranging in size from 18-inch to double 48-inch culverts.
During the design phase, additional assistance was provided for recommended improvements to the subgrade and pavement by Catawba Valley Engineering and Testing along with vendors for possible methods of rehabilitation and lining of some of the existing CMP culverts. A more detailed inspection was performed during the design phase to provide additional evaluation and determination of quantities for repair and resurfacing.
The evaluation noted the types of pavement distresses that were observed during the field investigation. The identified distresses consisted of those that were considered moderate or severe on all the pavement areas except one street, where only repairs are desired to be performed, all distresses from slight to severe were identified for work to help protect and extend the life of the existing pavement surfaces. The observed deficiencies noted were:
Alligator Cracking – Moderate to severe conditions attributed issues with the subgrade below the pavement and deflections occur resulting in cracking in areas of the pavement. The primary locations where these conditions occurred were at driveways and street intersections.
Longitudinal Cracking – Moderate to severe cracks that propagate parallel to the pavement. The condition occurred most often along the edges of the streets mainly where the shoulder was lacking or soft and the pavement did not have sufficient support from vehicular traffic.
Centerline Cracks or Separation – This was a common occurrence for a majority of the project area. The cracks, where present, ranged from slight longitudinal cracks to severe cracks and gaps along the center of the street. This deficiency is believed to be attributed to a poor seal between the two joints of asphalt where the lanes were laid. Water is able to enter the joint and during freeze and thaw cycles; the pavement is cracked at the joint and breaks or is raised and damaged during the use of snow plows.
Raveling/Rutting – This occurs in sections within the pavement area primarily in the wheel travel lane where the asphalt has been diminished or where settlement has occurred as a result of the repeated loads from vehicle tires.
Transverse Cracks – These are cracks that occur perpendicular to the pavement and either completely span the entire street or a portion of the street. These cracks tended to occur most often in areas where utilities were installed across the street and settlement occurred within the trench and resulted in cracks across the street.