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Show bV I RE Z&& I KRQ4P$l I SURFACE DRAINAGE OF ROADS B Crown of a Road 8hould Do Sufficient B to Shed Water Rapidly Recom- B mendatlon From Iowa. B CBy PIlOK. J. It DAVIDSON, Iowa Btnti B Anricultural CoIU-ko.) B Tho roads should bo provided with B surfaco drainngo. Tho cross section B Bhould bo of such a shapo ns to shod B nil rain at onco to tho Bldo ditches B To do this, tho road must bo oval 01 B bavo a crown, must bo smooth. The B first of thoso Is a mattor of construe- B tlon, and tho latter of nialntonanco B Tho sldo dralnago systoui should be B called upon to carry aa much watei B aa possible Water cannot bo carried B away by tho tllo drains until tho water B has sunk through tho soil and soft B enod It B Tho crown of a road should bo suf- B flciont to shod tho water readily. II B tho road Is to bo maintained and kopt B free from ruts nnd holos, less crown B will do than If tho road 1b to bo nog- B loctod. Tho Iowa Highway commltt- B mission rocommonded a slopo one H Inch to ono foot for a crown In tho B traveled way. This Is sulllclont for B most conditions. Tho crown should BBB BEwWi f t iPr -ys5i??flBH; bbbbm W&Lt&HM&4'9wmjs BBB T frt&Xm&i&vmEmiK BBB - fe-rrI4 -f'WYSiPBi MM BBB X afefc fllITwMji BB. MUXL.&$i&iJt.mZtm H V Well Laid Drain for Hill Road. BBBJ not bo too great A stoop crpwn chub- BBB 'w tho travel to bo concentrated at tho BBB contor, whoro ruts will bo worn and BBB washing result. Again thero is Bomo BBB difllculty In vohlclos passing. On tho BBB ildo of tho crown tho whoels of tho ve- BBBJ aides havo tepdoncy to grind tho road BBB down. Tho tops pf tho wheals aro BBB aearor tho guttor than tho bottoms. BBB This action, togothor with tho uwurv- BBB ' lug or llow action of tho lowor pnVt BBB ' of tho whool, has a very marked of. BBB BBB Tho Btcopor tho slopo of tho road BBB tho mora Important tho crown, for BBBj thoro is a tendency for tho water to BBB run down tho track rather than to BBBJ tho sldo. If wator onco begins to run BBB .down tho center of tho roadway It Is BBB put a short tlmo until tho road Is BBB |