The URL can be used to link to this page

Home My WebLink About20051972 Ver 1_Meeting Minutes_20030619Subject: Draft Minutes of the Interagency Hydraulic Design Review Meeting on June 19, 2003, for U-4026, Wake/Durham County. Team Members: Eric Alsmeyer - USACE PRESENT John Hennessy - NCDWQ PRESENT Travis Wilson - NCWRC PRESENT Gary Jordan - USFWS ABSENT Chris Militscher -EPA ABSENT Scott Blevins - NCDOT Design Services PRESENT Jennifer Harris - NCDOT PDEA PRESENT Participants: Tom Herring - Ko & Associates Herb Turner - Ko & Associates Brett Feulner - NCDOT ONE Anne Gamber - NCDOT Hydraulics The meeting began at 3:OOpm. Herb Turner handed out a chart listing the stream crossings and wetlands within the project limits and the associated status, stream geometry and description of impact. Herb described the project and mentioned that the project is located in both the Neuse and Cape Fear River Basins. The project was reviewed site by site. The issues to be resolved are as follows: 1. Site 1, Sheet 4: None -Project does not impact wetlands. Per John Hennessy, this site has been determined to be not subject to the Neuse River Riparian Buffer Rule. 2. Site 2 Sheet 6 Neuse River Basin: The wetlands area is a partially breached pond. Herb noted that the NCDOT Geotechnical Unit expressed concern that the remaining pond causes an increase in the water table that would be hazardous to the embankment of the proposed road and requested to draw down the pond. Both Eric Alsmeyer and John Hennessy agreed that it would be allowable and the wetlands impacts would have to be included in the permit. 3. Site 3A Sheets 11 and 12 Cape Fear River Basin: The stream banks were determined an Environmentally Sensitive Area by David Cox. The commitments were to note "Environmentally Sensitive Area" on the plan sheets and not to clear to banks. Travis Wilson will investigate to determine the purpose and quantification of this commitment. . After consulting David Cox following the meeting, it was decided that this area designated was incorrect. Therefore, Travis indicated that he had no concerns with the outlets noted in the Hydraulic Design that were listed in the ESA 4. Site 3B Sheet 11 Cape Fear River Basin: None - A supplemental pipe is required to convey the additional discharge due to upstream development. Its inlet is set approx. 1-ft above the extension of the existing inlet. Riprap energy dissipator for supplemental pipe has been relocated outside stream. 5. Site 3B Sheet 11 Cape Fear River Basin: The stream outlets into the Environmentally Sensitive Area. A supplemental pipe is required to convey the additional discharge due to upstream development. To reduce velocities entering the stream in the Environmentally Sensitive Area, the proposed channel is to be widened. This may cause a conflict with the commitment to the Environmentally Sensitive Area. Travis Wilson will investigate. ACTION TAKEN: As per Travis Wilson: The ESA should be located from approximately station 122 to station 136 on the North/Northeastslde of the project. Therefore I have no concerns with the outlets noted in the Hydraulic Design that were listed in the ESA, and do not have any concerns within the correct ESA. No action required. 6. Site 4 Sheet 14 Cane Fear River Basin: The culvert is to follow the existing culvert alignment. Travis Wilson requested that the culvert be buried 1' and no rip rap to be placed in bed, but noted that in keeping with the existing alignment it may be infeasible due to the rock line. 7. Site 5, Sheets 13 and 14: None -Project does not impact wetlands. 8. Sites 6, 7 and 8 Sheets 14and 15 Cape Fear River Basin: These are to be permitted through project R2000AB. 9. Site 9 Sheet 17 Cape Fear River Basin: The outlet of the culvert requires the stream to turn a right angle. The stream is constricted and already disturbed due to the greenway path. The design attempted to avoid impacts to the stream. The design calls for a retaining wall to be constructed to direct the flow. Eric Alsmeyer and John Hennessy had concern that this would result in scour that would undermine the culvert and the retaining wall. It was agreed to install a junction box and turn the pipe extension. Eric Alsmeyer would not require mitigation for the junction box and pipe extension and John Hennessy agreed not to require mitigation if the impact was less than 150'.