24 



BULLETIN 852, U. S. DEPARTMENT OF AGRICULTURE. 



Table 3. — Elements of experiments for the determination of friction losses in concrete 

 pipes, running fall; with retardation coefficients for various formulas- — Continued. 



1 



2 



u 



o 



3 



4 



5 



6 



o 



7 



8 



u 

 c 

 Pi 



Coefficients of retardation. 





9 



10 



11 



12 



13 



14 



o 



.a 



Si 



- 3 



z 







■d 



M 

















| 



S& 



'■§ 



.2 



Name and description of 



&§ 



>! 









.11 











a 



— 



= = 



— - 

 K 





- 



5 



pipe. 



a ° 



2 o 



■s m 



5 



£ ft 



o 



>> 

 o 



o 

 o 

 m 



(A 

 a 

 5 



O 



a 







3 



'3 









d 





Q 



V 



H 



Cs 



c 



C W 



Cm 



n 



/ 







1 



1 ins. 





cu.ft. 



feet. 



feet. 



1 

 1 











31 



S 4^ 



1 42.0 



Victoria aqueduct, siphon 



9.50 



.99 



.042 



. 466 163. 



188.2 



1.88 



.00S4 



.0097 





1916 



5 



Xo. 5 (see No. 30 above); 



18.50 



1.92 



.214 



.402140.4 



151.8 



1.48 



.01051.0131 







4 



series not so trustworthy 

 as Xo. 30; reach much 



20.90 



2.17 



.275 



.400139.9 



149.7 



1.45 



.0100.0132 







3 



21.60 



2.24 



.310 



.3891136.2 



145.1 



1.40 



. 0109 . 0139 







2 



shorter; ignore observa- 



24.90 



2.59 



.429 



.382133.7 



140.6 



1.35 



.0112;. 0145 











tion 1. 

















32 



S35 



3 



46.0 



Ri siphon, Umatilla proj- 



16.20 



1.41 



.096 



.416147.0 



102.4 



1.59 



.0099.0119 





1915 



2 





ect, U. S Reclamation 



25.10 



2.18 



.252 



.397139.7 



149.0 



1.44 



. 0108 . 0131 







1 





Service, Oreg.; jointed 

 concrete. 



36.50 



3.17 



.544 



.393 139.0 



143.1 



1.36 



. 0109 . 0134 



33a 



No 



2 



46.0 



Ri siphon, same as Xo. 32 



45.90 



3.98 



780 



.412145.0 



147.9 



1.40 



. 0106 . 0122 





1911 



1 





above; tests made when 



46.20 



4.00 



.S70 



.392138.0 



140.2 



1.33 



.0111,0134 





1912 



3 





pipe was new. 



48.20 



4.17 



1.080 



.375130.0 



129.9 



1.23 



.0117.0153 







4 







48.60 



4.21 



1.020 



.381 



135.0 



135.3 



1.28 



.0113.0142 



33b 



S60 



1 



48.0 



Churn Creek siphon, An- 

 derson-Cottonwood irg. 



47.40 



3.77 



1.145 



.313 



111.0 



111.0 



1.04 



. 0137 . 0208 





































dist., Calif. 





















34 



S52 

 1916 



1 



54.0 



Mabton pressure pipe, Sun- 

 nyside project, Wash. 



80.80 



4.99 



1.249 



.368 



132.7 



129.4 



1.20 



.0118.0146 



35 



S40 



6 



63.5 



Simms Creek siphon, Sun 



66.40 



3.02 



.289 



.420 



154.1 



150.7 



1.47 



.0104.010S 





1915 



1 





River project, U. S. Rec- 



78. 00 



3.55 



.377 



.432 



159. 2 



159. 6 



1.49 



.0101.0102 







5 





lamation Service, Mont.; 



86.60 



3.94 



.459 



.434 



160.2 



159.2 



1.49 



.0101.0101 







4 





monolithic pipe, straight 



123. 30 



5.61 



1.194 



.384 



141.0 



135.3 



1.24 



.0114.0129 







2 





in alignment; built 1907-8 



130. 60 



5.94 



1. 2S6 



.391 



143. S 



137. 7 



1.26 



.0112i.0124 







3 







140. 40 



6.39 



1.581 



.380 



133.7 



132. 4 



1.21 



.0116 



.0132 



30a 



AB 



1 



86.6 



Perlmoos cement works, 



58.40 



1.43 



.066 



.344 



130.9 



136.1 



1.28 



.0123 



.0148 





1913 



2 





Austria; gentle curves in 



90.50 



2.21 



.155 



.345 



132.4 



131.9 



1.23 



.0124 



.0147 







3 





alignment, on continuous 



113.90 



2.78 



.181 



.402 



153.7 



152.0 



1.42 



.0108 



.0109 







4 





down grade; original data 



131. 90 



3.22 



.312 



.355 



136.0 



131.8 



1.21 



.0122 



.0140 







5 





do not describe pipe 



152. 10 



3.68 



.402 



.358 



137.0 



131.4 



1.21 



.0122 



.0138 







6 





manufacture or surface. 



166. 70 



4.08 



.496 



.356 



130.3 



129.7 



1.18 



.0122 



.0139 



37a 



M 1 





110.0 



Catskill aqueduct siphons. . 



542.00 



8.21 



1.150 



.405 



100.0 



142.7 



1.20 



.0109 



.0101 



3^ 



S59 



4 



120.0 



Whitney siphon, Los An- 



223.00 



2.84 



.191 



.326 



130. 4 



123.4 



1.12 



. 0133 . 0152 





1916 



3 





geles aqueduct, Calif., 

 monolithic pipe, cement 



236.00 



3.01 



.211 



.328 



131.2 



123.0 



1.12 



.0132.0151 







2 





238. 00 



3.03 



.284 



.285 



113.5 



100.1 



.90 



. 0153]. 0199 











mortar coat. 

















• 



39a 



M 2 



5 



174.0 



Rondout tunnel, Catskill 



260. 90 



1.58 



.031 



.357 



150.0 



144.8 



1.31 



.0124 1 . 0116 





1915 



4 





aqueduct, X. Y.; mono- 



345. 00 



2.09 



.051 



.308 



155.0 



140.4 



1.32 



.0119 



. 0109 







6 





lithic tunnel lining made 



469. 00 



2.84 



.112 



. 338 



140.5 



130.1 



1.18 



.0131 



.0130 







3 





with oiled steel forms, ob- 



472. 30 



2.86 



.0S9 



.381 



159.0 



148.4 



1.32 



.0110 



.0102 







2 





servations made on con- 



620. 90 



3.76 



. 155 



.380 



159.0 



144. 5 



1.28 



.0116 



.0102 







7 





secutive days. 



624. 20 



3.78 



.211 



.327 



137.0 



123.0 



1.08 



.0134 



.0138 







8 







756. 30 



4.58 



.319 



.323 



135. 



119.2 



1. 04 



. 0136 . 0142 







1 







771. 20 



4.67 



.253 



.369 



154.0 



137. S 



1.21 



.0119.0108 



40a 



M 3 



6 



174.0 



Wallkill tunnel, Catskill 



260. 90 



1.58 



.033 



.346 



143.5 



140.1 



1.27 



.0129.0123 





1915 



5 





aqueduct, X. Y., mono- 



345. 00 



2.09 



.051 



.368 



154. 



146.4 



1. 35 



.0120 



.0109 







7 





lithic tunnel lining made 



469. 00 



2.84 



.107 



.345 



144.0 



133.4 



1.19 



.0128 



.0124 







4 





with oiled steel forms; ob- 



472. 30 



2.86 



.092 



.374 



157.0 



145.7 



1.30 



.0118 



. 0105 







3 





servations made on same 



620. 90 



3.76 



.192 



.341 



143.0 



128.7 



1.14 



.0129 



.0127 







8 





day that identical dis- 



624. 20 



3.78 



.170 



.365 



152.0 



138.2 



1.22 



.0121 



.0111 







1 





charge held in pipe Xo. 39 



736. 50 



4.46 



.249 



. 356 



149.0 



132.7 



1.17 



.0124 



.0117 







9 





above, which see. 



756. 30 



4.58 



.261 



.357 



119.0 



132.9 



1.17 



.0123 



.0116 







2 







771.20 



4.67 



.269 



.358 



149.5 



133.2 



1.17 



.0123 



.0115 



41a 



RDJ 





216.0 



Conduit Xo. 2, Ontario 



1,018.00 



4.00 



.108 



.424 



181.0 



103. 



1.430 



.0101 



.0098 





1913 







Tower Co., Canada. See 



2, 036. 00 



8.00 



.448 



.416 



178.0 



152. 



1. 30 1 



.011!.", 



.0102 





1014 







p. 84 for explanation of 

 items in this table. They 



3,045.00 



12.00 



.990 



.420 



L80.0 



148.0 



1.256 



.0101 



.0100 











4, 063. 00 



16.00 



1.701 



.427 



1S3.0 



14S.0 



1.242 



. 0102 



. 0097 











do not represent data on 



5,091.00 



20.00 



2.397 



. 450 



193.0 



153.0 



1.280 



.0097 



.0087 











actual individual runs, 





























but are from velocity- 





























friction curve. 





















