In n ıo u n ta in o u s regions, th e efficiency of fo re stry activ ities dep en d s p rim a rily on th e p resen ce of h ealth y a n d d ep en d a b le fo rest ro ad s. O n e of th e m ain facto rs affecting th e d u ra b ility o f fo rest ro a d s is th e presen ce of sufficient n u m b e r of co n stru ctio n b u ild in g s a t p ro p e r îocations. Id en tify in g tlıese co n stru ctio n b u ild in g s on to p o g rap h ic m ap s re q u ire s a lot of tim e a n d lab o rs. T h e a im o f this stu d y w as to d e te rm in e Îocations w h e re co n stru ctio n b u ild in g s a re n eeded, a n d ty pes, d im en sio es a n d n u m b e r of these bu ild in g s on a 79 k m fo rest ro a d in Y eşiltepe F o re st D istrict (M açk a, T rab z o n ) using G e o g rap h ical in fo rm a tio n S ystem s (G IS ). L a te r, vvatershed a rea s vvere calcu lated using G IS . T h en , cross-sectio n a re a s of h y d ra u iic co n stru ctio n b u ild in g s vvere calcu lated using T alb o t fo rm u la . C ro ss-sections th a t a re less th a n İ m 2 vvas classified as c irc u la r cro ss-section p ipe o r sm all cu lv ert, betvveen 1 a n d 2 m 2 as b ask et h a n d le d p ip e o r h a m p , betvveen 2 a n d 8 m 2 as larg e cu lv e rt o r pipe h a m p a n d la rg e r th a n 8 m 2 as b rid g e. A cco rd in g to th e p re se n t h y d ra u iic co n stru ctio n b u ild in g s, it vvas d e te rm in e d th a t 38 vvatershed a rea s n eed ed som e k in d o f c o n stru ctio n b u ild in g . O f these, 20 sh o u ld be c irc u la r cro ss-section pipe, 13 b ask ets h a n d le d p ip e o r h a m p a n d 5 la rg e c u lv e rt o r p ip e h a m p . I n conclusion, G IS c an b e used to calcu late vvatershed a re a s a n d to d e te rm in e ty p es of c o n stru ctio n b u ild in g s in th e fu tu re.