AfroM-end Unuier seis 

 the dnenion, typictiltx 

 built lis a wing dimi. 

 Ivxcess fltms go an>wui 

 the upstream end of ilw 

 diversion rather thtui 

 overtopping the blocks. pv-»*;fc»4"' 



CONCRETE BLOCK 



IRRIGATION 



DIVERSIONS 



Gallatin 



onservation District 



advanta(;ks 



• Installation and rtemovai 

 and fast and easy. 



• L(K:al farm equipment can 

 be used to Inslali the 

 diverstion. 



• The concrete blocks last for 

 manv years. 



• Long-term maintenance 

 of the diveptlon site is 

 reduced. 



• Safely ha/iirds and 

 Interfervnce to recreational 

 floaters an^ minlml/ed. 



• Ush passage is alln\ted 

 around the structure. 



• If the stream moves, the 

 bI<Kk-s can be moved to 

 a new position. 



UlSADVAMAlitUS 



• An area on the vireambank 

 adjacent to the diversion is 

 reet|ulred to store the 

 bliKks. 



• HliM:kdl\erNion is designed 

 to Ih- removed in the fall 

 after the Irrigation si-iison. 



■406-587-6929 



Tom Hughes, from the Montana Department 

 of Natural Kesourte^ and ( unservallon, 

 developed a new lrrigatl<m diversion system 

 Using portable concrete blocks. The diversions 

 were designed to pn>vide an environmenlally 

 friendly altemathe to the traditional diversion 

 methods of constructing permanent dams with 

 large rrnrks and constructing temporary dams 

 with river gravel, loncn-te blocks an- 

 relatively Inexpensive and durable, and they 

 can be rapidly placed in the streaml>ed. 



A 223 grant was acquired In 1997 by (Gallatin 

 Coaservatlon District to pnivlde assistance to 

 construct two steel forms capable of building 

 a wide variety of concrete block sizes. I he 223 

 grant was also used to Install the first block 

 diversion on the Mchols-Hurnll Ditch in 

 .ngan. Mfteen blocks werv placed with an 

 excavator. Kach 2-f<H»t b> 6-fiHil bUxk welgtLS 

 appn)xlmatel> 2.1HNI pounds. 



1 he (•allatln Cunservatfon 

 District applied for a second 

 grant In 2IHHI (o place thrve 

 additional structurvs in the 

 (iailatin v;ilUy : on Haker 

 >ltch. koadarmel Ditch, and 

 at Manmitiih Ditch Company 

 on Ibet. allatln Klver. I he 

 latter n'»|uin-d IK bb^ks for 



version of the water Into the 

 hc^Kl of the irrigation ditch. 



Mammoih Ditch 



