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<br />I . <br />I <br />,. Mr. Dwayne Stafford <br /> July 9, 1997 <br /> Page 4 <br />I Conclusions <br />I The television inspection project provided valuable information about the structural condition of <br /> some extremely isolated sanitary sewer lines and identified some sources of the III in the system. <br /> In the residential area, root intrusion appeared to be the primary problem. Very little III was <br />I observed. <br /> In the low lying interceptor lines a substantial number of leaking joints were observed but most of <br />I the pipe appeared to be structurally sound. The exception was the segment between County Road <br /> E-2 and old Highway 10 in the Valentine Park area. This segment had structural and operational <br /> (root intrusion) problems. <br />I The projected "cost recovery periods" appear to be quite long (34 to 103 years) however, the basis <br /> for the calculations, estimated III rates and construction costs may vary somewhat due to the <br /> unique nature of the proposed projects. <br />I Recommendations <br />I~ Based on the observations made from the television inspection work we would provide the following <br /> recommendations: <br />I . In the identified residential areas, the City should investigate the use of root cutting <br /> equipment followed by a root growth inhibitor. <br />. . Due to the unique nature of the proposed construction work in the interceptor areas we <br /> would recommend contacting a Contractor(s) to further investigate the feasibility and cost <br /> effectiveness of specific rehabilitation options. <br />. . The City should evaluate the budget available for rehabilitation work in comparison to the <br /> preliminary Contractor costs to define feasible rehabilitation project(s) within the available <br />. annual budget(s). <br /> The City should consider an annual allocation for rehabilitation work in order to continue <br /> . <br />, reducing the amount of clear water entering the collection system. <br /> We anticipate the brief letter report will provide you with the cost estimating information necessary <br />, to evaluate the corrective actions recommended. Greg Stonehouse will be present at Monday's <br /> City Council meeting to address any further questions you or the City Council may have. <br />I Sincerely, <br /> Howard R. Green Company <br />.. ~~ <br /> arles R J nski, P.E. Howard R. Green Company <br /> 8OO/320.0913.j <br />, CONSULTING ENGINEERS <br />