Okoboji Harbor

Okoboji Harbor Sewer Rehabilitation Page

The Okoboji Harbor sewer system was installed with the construction of the canals in the early 1960’s. The sewer system was maintained at the time by the developer of the Okoboji Harbor. In 1978, the sewer system and easements were transferred over to the Iowa Great Lakes Sanitary District and made public. At the time of installation of the private sewer and the transfer to the Sanitary District, the District has no established standard material requirements. Today, the Sanitary District would not allow such a transfer unless the system was brought up to the District’s standards.
In 2012 the Sanitary District purchased our easement machine that allows us to clean the sewer in tight locations around the lakes. The Okoboji Harbor area was cleaned and then inspected with a camera. The issues found were several including; sunken pipe sections, deformed pipes, missing manhole bases, and much more (Harbor Pipe Issue Photos Found Below). After investigation, the issues were brought to the Trustees of the Sanitary District to review for possible action. It was decided in 2013 that this would need attention as soon as possible.
In the fall of 2013 the Sanitary District hired HR Green, Inc. to study the sanitary sewer facilities in the area of the Harbor and provide solutions and cost estimates for rehabilitation of the system. HR Green completed this work and presented three options. The first option was to move the sewer to the off- lake side of the homes. The second option was to bore pipes adjacent to the existing sewer pipe. The third option was to rehabilitate the existing pipe using a combination of pipe- bursting, pipe lining and open cut replacement in the current location. The first option was not possible as the relocated pipe elevations do not allow the sewer to gravity flow. The second option is possible but more expensive and more has more disruption to property. The third option would still have some disruption but it would be very limited to specific areas. The Trustees agreed to proceed with the third option.
The third option will involve three different types of rehabilitation: pipe bursting, pipe lining and open trenching. The goal is to use as much pipe lining rehabilitation as possible; then rehabilitate with pipe bursting in areas that cannot be lined; and finally open cut replace the remaining areas that cannot be rehabilitated by lining or pipe bursting.  You can learn about pipe bursting by clicking on the line below for Section A, pipe lining is explained until the Section B link below and the manhole rehabilitation is listed under the Section C line below.

DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR
20% DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR
HARBOR5
30% DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR
HARBOR4
DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR
HARBOR3
15% DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR
HARBOR2
SAGE IN PIPE REDUCING CAPACITY BY 80%
HARBOR1
DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR
HARBOR7
DEFORMED SEWER PIPE IN THE OKOBOJI HARBOR