Road & Intersection Improvements, Reynolds Road & Main Avenue

This project was intended to resolve long term road flooding problems along Reynolds Road and to make capacity improvements to the Reynolds Road and Maine Avenue intersection. This project involved serious flooding of a major industrial intersection because of inadequate stormwater transmission facilities and a large upstream drainage basin that discharges through the intersection to an outfall system southeast of the intersection. The design and permitting of the project was complicated by phosphatic clay slimes left over from the phosphate mining process. The original design for this project (prepared by another consultant) combined all of the offsite flows with the runoff from the intersection and would have required the construction of a large stormwater treatment and attenuation system in an area that contained unstable soils. EVI successfully re-designed the system to separate the offsite stormwater contributions from the intersection runoff. As a result, a much smaller stormwater attenuation and treatment system was required and significant time and money was saved. Finally, a CSX railroad spur immediately north of the intersection and parallel to Maine Avenue had to be reconstructed as a part of the intersection improvement project. During this project, we encountered a number of unforeseen issues that required changes to our scope of work, these issues include: 1. The original electronic copy of the model provided by the County was corrupted and unusable and the original Consultant was unable to provide a usable copy. As such, our contract was modified to include a complete re-development of the stormwater model. 2. The electronic design files provided by the County contained a complete survey of the project site and the County wanted to utilize their in-house survey staff to provide any additional survey data we needed. When it was discovered that the original survey data was erroneous, County staff was unable to provide the needed information. As such, our contract was modified to include surveying services. 3. Our re-design and permitting effort was significantly delayed by CSX. Because of the severity of the flooding problems and the CSX permitting delay, the County decided to construct the project in four Phases which required additional effort to divide the plans into three sections as well as significant additional construction management effort. 4. Updating the survey for the project revealed problems with the right-of-way lines shown on the original plans. The County asked that we revise the plans rather than further delay the project attempting to purchase additional right-of-way. 5. Completion of the SWFWMD permitting resulted in additional design changes from the original plans. SWFWMD disallowed proposed wetland mitigation plans requiring additional wetland mitigation effort. 6. FDOT required additional design and permitting for an outfall on SR 540 that was not included in original plans. 7. The railroad crossing improvements requested by CSX conflicted with the geometry of the intersection as laid out by the original Consultant requiring additional out-of-scope design changes. 8. New County standards for intersection signalization were adopted toward the end of the design process requiring further out-of-scope design changes.