A photo of the sinkhole discovered near the malfunctioning drain line on Manor Hill.

(Updated 10-09-19) This past weekend, a sinkhole appeared next to one of the small manholes located near the original source of concern on this project. The City’s maintenance person visited the site on Monday and set out some cones to make residents aware of the anomaly.

In the meantime, the City continues its search to determine the owner of the drain line so repairs can be made. Despite claims made at Tuesday night’s City Council meeting (that no one will ever find any paperwork saying who owns the drain line), the City will look through its records and records filed with the county to see if there are any records of the conveyance of the drain line to the City.

If there are no records of a conveyance, then the drain line belongs to the residents to which it’s connected and, subsequently, their responsibility to maintain. Failure or refusal to do so may carry consequences for the owner, not to mention inconveniences to both the owner and his/her neighbors.

While it’s not entirely clear what the City’s role in remediating this problem, should the owner refuse or neglect to address things in a timely manner, action is already being taken to make a determination in that regard.

Please continue to follow this story on the City’s website for future updates.

(Updated 10-01-19) The City’s engineering firm, MSA Professional Services, has provided a letter summarizing this problem and estimated costs for repair.

According to MSA’s Chris Cooper, it’s been determined the rear yard drainage line in question is plugged and only effecting one household in the neighborhood. The recommendation is to hydro-jet the line and then inspect it with a camera in an attempt to identify the cause of the problem. The estimated cost to do this is $1,200 – $1,500. According to MSA, further repairs to the line could run as much as an additional $4,500.

Ownership of the line still remains to be determined. If the line is not owned by the City, effected residents may want to only repair the line as outlined above. If the City of Riverdale owns the line, MSA recommends replacement of the line from 234 to 250 Manor Drive as the first phase of a larger program to reconstruct the line all the way to Fieldcrest Road.

It is the engineer’s assessment that much of the line is in very poor condition and will need to be replaced at some point in the future. The cost of such a project starts at around $11,300. Additional time and materials required to obtain waivers and repair, re-seed and blanket the land disturbed by the project has not been estimated at this time.

A copy of the letter from MSA to the City of Riverdale can be found by clicking here.

(Original Post 09-13-19) At its September 10th meeting, the City of Riverdale’s City Council asked MSA Professional Services to look into a drainage issue affecting the rear yards of several residents on Circle and Manor Drives.

A preliminary investigation of the problem (summarized in this memo to the City Council), led to the request.

Meanwhile, the City is currently looking into records of development in the area to determine who actually owns the line that appears to be clogged. Once ownership/responsibility for maintenance is determined, the City will sit down with residents to walk through the various options available to address the problem and repair the drain line.