Texas Register, Volume 11, Number 19, Pages 1163-1244, March 11, 1986 Page: 1,180
1163-1244 p. ; 28 cm.View a full description of this periodical.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
TABLE 2
IHAARD POTENTIAL CLASSIFICATIONsaw ,
Significant
. 29914 ' Hydrologic Citeria for Dams.
(a) minimum acceptable spillway de-
sign flood. The hydrologic criteria contained
in Table 3 are the minimum acceptable spill-
way design flood (SDF) for proposed dams
as defined in 299.1 of this title (relating to
Definitions), including those to be constructed
in accordance with the Texas Water Code,
11.142.Loos of anw Life
None expected (bNo pezas-
nant structures for human
habitation)
Possible, but not e~ipted
(A small rber of inhabi-
table structures)
pected (Urban devel p-
/ mert or large manber of
inhabitable structures)(b) Exemptions to minimum hydro-
logic criteria. Proposed low hazard dams ex-
empt under the Texas Water Code, 11.142,
are exempt from the minimum criteria. Any
other proposed structure may be exempt
from the minimum criteria if properly pre-
pared dam breach analyses show that exist-
ing downstream improvements or known or
planned future improvements will not beMtinmal (dsvel9ped to
oocabinal structures or
agricultura l improveants)
appreciable (Notable agri-
cultural, industrial or
couarcial developneat)
acessive (Evtensive
public, industrial,
camuarcial or agricultural
development)adversely affected. A properly prepared
breach analysis should include at least three
events, the normal storage capacity nonflood
event, the barely overtopping event, and the
PMF event. Data on additional flood mag-
nitudes may be provided as necessary to docu-
ment other conditions or conclusions. Down-
stream flooding differentials of one-foot or
less between breach and nonbreach simula-
tions are not considered to be adverse.TABLE 3
HYD~IfLDGIC CRIEIA PJR DAMS
Classification
S(No ard
law (no. 3)Mirdmn Flood rograh
Size
SmallIntermediate
LargeSignificant (No. 2)
Sime to h P r
me
4 PM to h PMF
P Er to PuR
PHFSnall
Internadiate
LargeNLgh (No. 1)
Small
Intenediate
uLrge11 TexRf 1180 March 11, 1986
w
PiE
PEw
_ ___ __
Texas Register 4
Upcoming Pages
Here’s what’s next.
Search Inside
This issue can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Periodical.
Texas. Secretary of State. Texas Register, Volume 11, Number 19, Pages 1163-1244, March 11, 1986, periodical, March 11, 1986; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth243767/m1/18/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.