Agenda - Parks and Recreation Commission - 06/09/2005 - Joint with CC

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River & Wetland Crossings (~'1~:ossing sensitive areas such as wetlands and rivers requires ~,dspccial care and should be aw~idcd if possible. In fact, part of thc permi, tdng process to cross a river ~)r wcflat~<J ~:cqukes the exploration ~;( alternative routes. Cert~n agencies should be contacted as part of a ted udca] cvMttation panel (~P). A encies to Contact ~, ~)epartrnc~t of Natural = }x~cal S~)il and ~ter f2onservation Service ~RCS) o Rum Ri,,~:r X~'atershed Dis=ict ~ [Jnited Stntes Army Corps of !7,,~gin~:cr~ (US~XCOE) ~ J.ocal (5overnment Unit (City off l{atnsey) '1 hose groups generally meet regularly o~' upon req~m'st. ~[%ese meetings are open to the public, as it is beneficial i~> have inp~,t fi'om local residents, in addition t,, the input from the r~guta to~:y ~) t:tS.cials. 'l'lte type of water body (classification), its functional and ac:;thel~c vahtc, specml sensitSvities and l~ropensit? t~ flooding are among the J'ax:l:~rs evaluated. The Physical Crossing Part of the permitting process requires that the type of crossing proposed is def'med, since the crossing "type" will likely determine the extent of the impacts to the water body. · Each crossing ~vill be different depending upon the ability of the soils and/or vegetation to support the proposed structure. The fluctuation of water levels, hydraulics, and loads on bridge spans must be evaluated by a qualified professional. · Boardxvalks with various support structures to bridges may be used for crossing. See figures 6.7, 6.8, 6.9 in Section 6 for some typical boardwalk crossing types. · On bridge spans, it is likely that the platform of the bridge will be elevated. IL'flings must be constructed on the bridge for safety and it is recommended that all new bridges constructed in Ramsey be at least 10' wide. · Measures must be taken to prevent motorized vehicular traffic from crossing these bridges. A loc ~kable bollard ~vith a common city key may be a useful deterrent to unauthorized motor vehicul,-tr access across trail bridges, while still allowing for trail user movement. If it is intended that maintenance crews will drive trucks or equipment across the bridges, the structure must be designed and certified accordingly for strength. The trail may also need to have room for a turnaround areas, depending on the maintenance equipment used. I Trail bridge designs vary &pending on soils and use.