6.1. - 6.5. SR 08-27-2001 - Laserfiche WebLink

Home Browse Search

proposed as a three-quarter access with a right-in/right-out and left turn-in movements be initially constructed as only a right-in/right-out. We do not feel that the left turn-in will add significantly to the traffic movements in this development and will require substantial modification to the median and irrigation system in Tyler Street. 2. The access onto Tyler Street from the west side of the development (Outlot C) has been removed. 3. A left turn lane is shown as being developed for southbound Tyler Street at the southerly full access of Elk River Station. No additional traffic information as it pertains to the proposed round-about internal to Elk River Station has been submitted. As we indicated at the Planning Commission, our major concern is that if traffic backs up from Tyler Street through the round-about, the efficient operation of the round-about will be compromised. We question whether or not, with the number of trains passing through Elk River, traffic on Tyler Street may queue up as a train crosses Tyler Street, precluding left tums out of Elk River Station. At the same time, when the train has passed Tyler Street, the queue of traffic heading north on Tyler Street may continue to preclude left tums out of Elk River Station. This may cause isolated times when the left turn movements waiting to enter onto Tyler Street may back up through the round-about. B. DRAINAGE ISSUES Revised drainage calculations for the internal storm sewer system have not been resubmitted. However, we have met with the Developer's engineer and additional catch basins have been shown on the Grading Plan where appropriate. The Developer's engineer has assured us that the revised storm drainage calculations will take into consideration our eadier comments. The eastedy ponding system has been revised so that the retaining wall is only on three sides of the southerly smaller pond. Therefore, a means to egress the pond area is provided on the southerly side of the pond. The Barrett property has been removed from the Site Plan for Outlot C (west side of Tyler Street) because the Developer has not acquired this property as yet. A small area has been designated as a possible ponding area. In reality, if this area develops without the Barrett property, more detail will need to be provided especially relative to the drainage system. Hopefully, the Developer will be able to acquire the Barrett property and provide an overall Drainage and Development Plan that is consistent with MnDOT's plans for the North Star Corridor parking area. The Developer's engineer has revised the emergency overflow elevations throughout the development after meeting with us to discuss our issue relative to the road flooding. The emergency overflow now is acceptable and will only provide minor flooding of the street system in order to operate effectively. Howard R, Green Company Ltr 8-22-01 HadickerUtr 8-22-01 Harlicker CONSULTING ENGINEERS Page 2