NW Military Highway Project Information Page
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FREQUENTLY ASKED QUESTIONS
What does this project accomplish?
Planned improvements to NW Military Highway in the City are:
- Adding a continuous center-turn lane
- Adding sidewalks and bicycle accommodations
- Adding a traffic signal at Pond Hill Road intersection
- Installing raised medians between Loop 1604 and Pond Hill Road
- Multiple drainage improvements to prevent increased storm water runoff
- VIA covered bus stop installed near Pond Hill & NW Military
- Partial reconstruction of residential driveways to safely tie into the expanded road
When does this Project Start? When will it end?
First phase of the construction will be the relocation several utility lines beginning in May 2021 and lasting several months. This will include portions of the Shavano Park water main. During this phase it is likely that the two outside lanes will be closed and two way traffic will be in the two center lanes
This fall, primary construction will begin on the North section near Loop 1604 and extend south. Again, we can expect various lanes to be closed during construction.
Total project length is anticipated to take 2 years.
Will there be Right-of-Way acquisition by the State?
No. All improvements are within the current State Right-of-Way.
Will TXDOT be discharging water into the Elm spring culvert?
Yes. As described below answers, the existing crossroad culvert will be replaced. The flow from the new culvert will not exceed the flow from the existing culvert.
If they discharge onto the Elm Spring roadway, what length of NW Military Highway will that rainwater be from? Which direction will the drainage culverts be pitched?
The length of NW Military Highway draining to the new culvert matches the length draining to the existing culvert, approximately 1,000 feet. The direction of the new culvert matches the existing culvert.
If they discharge onto Elm Spring Lane, what plans are being made to mitigate the impact of the additional storm water
Although the new culvert will have additional capacity, there will be a weir inside the culvert to constrict the flow to existing conditions. The City of Shavano Park will be looking into an overall drainage study that may or may not modify this in the future and any additional flow will be at the City’s direction.
Given the widening of the road by approximately 14 ft – 10 in on both the east and west side of the current road (creating a total cross-section width of 79 ft – 8 in feet of impervious cover, which includes the new curb and sidewalks); how is it that the amount of storm water collected will remain the same?
The amount of storm water runoff will slightly increase due to the new impervious area. However, when the culvert is replaced, a weir will be added to control the rate of this runoff. The weir will release the runoff so the rate exiting the new culvert will equal the existing culvert’s flow rate. There will be no increase in the flow exiting the new culvert.