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  • Users: dficker
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  1. dficker

    Galvanized Water Main - AWWA Spec?

    What is the applicable AWWA spec (AWWA C-???) for galvanized steel pipe water main? Is there a spec available online? (I am matching an existing pipe.) Thanks Dan
  2. dficker

    Min Clearance between 12" CI clasee 22 water main and storm sewer

    the perils of storm sewer design in the urban setting: Whats the absolute minimum clearance between an existing 12" Cast Iron Class 22 water main and storm sewer. The storm sewer will most likely be a 48" inner diameter corrugated plastic pipe. I can get about 6" clear, can I encase the water...
  3. dficker

    Driveway Sight Distance

    I'm double checking sight distance for a drive adjacent an overpass of an expressway. Drive is on the overpassing road right off the bridge approach, and can't be relocated. The typical intersection sight distance has the car set back a certain distance from the crossing road 15' or so while it...
  4. dficker

    HEC_RAS 3.0 Reverse XS direction

    We produced sections for HEC ras from Geopak, which were reveresed as far as the convention that the sections should be oriented looking downstream. I understand that the orientation of the cross sections is unimportant, as long as they are all oriented the same way, but we will sumbit to the...
  5. dficker

    HEC-RAS 3.1.2 XS issue when Splitting Reach

    I started with XS from Geopak, that is why I had to split a reach into two for A junction. I added a point on the end of the tributary reach and dropped it on the main reach. The program asked me if I want to split the main reach at that point. I said yes and supplied a new reach name for the...
  6. dficker

    Ground Slope Behind Curb

    A 35 MPH street, over crossing a Freeway. 6" high curb, with a gutter plate. We are raising the bridge for clearance on the freeway and am looking to minimize grading on the overcrossing road for the raised profile. Most standards I see show the ground sloping towards the curb to some hinge...
  7. dficker

    Superelevation Number of Lanes Adjustement Factors

    I have an intersection widening project, for left turn lanes; a number of horizontal curves on each approach. Should I use a correction factor for N=1.5 for all curves, or just the curves with the three lane section?

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