NH SADES

New Hampshire Statewide Asset Data Exchange System

  • Home

  • About

  • Training

  • Links

  • Stream Crossings

  • Contact

  • More

    Links
    Training
    About Us
    Support
    1. Stream Crossing Support
    2. Assessment Questions
    3. Community Notification Letter
    Search
    Rockingham Planning
    May 22, 2019

    Community Notification Letter

    0 comments

    Hello Everyone. At the training yesterday some people had expressed interest in seeing the text of our community notification letter. We keep a stack of these in our field vehicle and hand them out to members of the public when they inquire with our field crews. We found this beneficial to (1) provide them additional information and (2) avoid some of those long conversations we can get trapped in.

     

    ------------------------------------------------------------------------------

    Memo To: RPC Commission Community Members and Municipal Officials and Staff

    From: Christian Matthews, Transportation/GIS Analyst, Rockingham Planning Commission

    Date: May 22, 2019

    Subject: RPC Regional Stream Crossing Assessment Notification

     

    This summer and fall, Rockingham Planning Commission (RPC) is continuing a regional project aimed at identifying stream crossings (culverts and bridges) that may pose a hazard to our communities. This multi-year assessment of stream crossings in the region is intended to assist municipalities in identifying critical and hazardous culverts and bridges, particularly those susceptible to failure due to flooding or those that cut off critical evacuation routes.

     

    Using state stream crossing assessment protocol, RPC will have staff members out collecting data on state and local roads. The assessments will involve staff accessing crossings from public right of ways.

     

    The RPC shares all information collected with our member communities and works with those communities during the summer to help identify areas know to be problematic. Municipalities can use this information as a guide to prioritize those stream crossings most in need of retrofit or replacement. Along with prioritizing infrastructure modifications, results of these assessments can also be incorporated into municipal and regional hazard mitigation plans and vulnerability assessments.

     

    For more information about this project and to view this public data, please go to: http://www.rpc-nh.org/maps-and-data/data/transportation-asset-inventory-data

     

    For any questions or comments please contact Christian Matthews at (603) 658-0523 or cmatthews@rpc-nh.gov.

     

     

    0
    New Posts
    • Henry Underwood (SWRPC)
      Aug 9, 2018

      How do I calculate crossing slope?

      I can see that our original elevation measurements have been scaled in some way and would like to confirm the calculation to create the slope % (Field 59). Currently, we have scored assessments with these scaled elevations, but "0.00" for the slope. Is the following formula correct? Structure Slope (%) = [ Inlet Invert Elevation (ft) - Outlet Invert Elevation (ft) ] / Structure Length (ft) or Field 59 = [ Field 52 - Field 55 ] / Field 58 Is it standard practice to provide these values as a negative number or a positive number?
      1 comment
      0
    • Rockingham Planning
      Jun 12, 2018

      Headwall Type

      On page 29 it looks like the picture for "None" represents a structure that is just covered with soil/fill/dirt on top of it. We had a similar scenario in the picture below. Only earthen material is used to keep the below culverts in place. So this would be "None" not "Other"?
      1 comment
      0
    • bfalco
      Jun 11, 2018

      Deposits taller than bankfulls

      Hi all, We have been assessing several stream crossings that appear to have been affected by last fall's flooding events. This has caused deposits to buildup TALLER than bankfull heights, and has created bankfulls that appear to be "new" or not natural. We are wondering if we should be taking bankfulls where the "new" banks are (Where deposits have settled on top of original banks). Or if they should be taken where the original banks were (if that can be determined). Photo 1: If you look closely, you can see stream bed material dropped on top of eroding banks. More dense deposit photo right. Photo 2: Original bank extends into photo right eventually to stream. As you follow bank downstream, you can see that it disappears underneath a deposit . Used vegetation growth to guess where original bank likely located.
      1 comment
      0