. >> abo a thirdf that field s cs anvarious bris, and the si whyh. en i wasbout 6 or 8, longbell [phonetiched logging in the area, en it raed hard the rir and an grew u there w a diffence thathe riverould t go up fast, and it wld stay hier folonger piod of te, anstayed medn for mu long period time. sically,n the la 30 year theye relogg everythg th longbellogged er howeverany year d the rir again going u and do faster an it used to. people would probably tell me i'm wrong, but i look at the river about every day. >> something like 1700 landslides were documented in that one event. that's a lot of timber and sement getng intohe river and it's no mystery that that caused flooding if you take a glass of water and you fill it up to just shy the topanthen youump fistful of dirt into it, at's goi to happ? wellthe wates going flow out overhe top othe glas >> what you have in the willapa hills area is an area that's narally ve prone to ld slidin because it has very deeply weathered rock, so there's not a lot of strength in the rock itself. so, one of the reasonshy we have seen so my landides in tha