Tr 55 Worksheet 2 Form PDF Details

In the realm of environmental conservation and land development, the TR 55 Worksheet 2, officially known as the Runoff Curve Number and Runoff form, plays a pivotal role. Originating from the U.S. Department of Agriculture’s Natural Resources Conservation Service, this document, last updated on April 4th, provides a structured approach for professionals to assess and record runoff data for specified projects. It is designed to capture crucial information concerning soil type, cover description, and the associated runoff curve number (CN) which is essential in evaluating the potential impact of precipitation on the land in question. The worksheet prompts the user to detail the project location, design, and review credentials, encouraging thorough documentation. It distinguishes between current and developed states of land, allowing for a comprehensive analysis of how development influences water runoff. Through calculating the CN across different areas and conditions, users can estimate water runoff volume following a precipitation event by applying specific rainfall data and formulas provided in the appendixes. This form, by facilitating meticulous calculation and planning, not only aids in the management and preservation of natural resources but also in the mitigation of adverse effects on the environment due to land development activities.

QuestionAnswer
Form NameTr 55 Worksheet 2 Form
Form Length1 pages
Fillable?No
Fillable fields0
Avg. time to fill out15 sec
Other namestr 55 curve number, tr 55 form pdf, tr 55 curve, runoff curve number fl

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U.S. Department of Agriculture

FL-ENG-21A

Natural Resources Conservation Service

04/04

TR 55 WORKSHEET 2: RUNOFF CURVE NUMBER AND RUNOFF

Project: Designed By: Date:

Location: Checked: Date:

Circle one: Present Developed

1.Runoff curve number (CN)

Soil name

Cover description

 

 

 

CN 1/

 

 

 

 

 

 

 

Area

Product

and hydrologic

( Cover type, treatment, and hydrologic

 

 

 

 

 

 

 

 

 

 

 

 

acres

of

 

 

 

 

 

 

 

฀

group

condition; percent impervious;

 

Table

 

Fig.

Fig.

 

 

 

mi2

CN x area

 

 

 

฀

(Appendix A)

unconnected/connected impervious area

2-2

2-3

 

2-4

 

 

 

%

 

 

 

 

฀

 

 

ratio)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1/ Use only one CN source per line.

 

 

 

 

 

 

 

Totals =

CN (weighted) = total product =

 

 

=

 

 

 

Use CN =

 

 

 

 

 

 

 

 

 

total area

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Runoff

 

 

 

 

 

 

 

 

 

 

 

 

 

Storm #1

 

 

Storm #2

Storm #3

Frequency

yr.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rainfall, P (24 hour)

in.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Runoff, Q

in.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Use P and CN with Table 2-1, Figure 2-1, or equations 2-3 and 2-4.)

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Best ways to prepare tr worksheet curve sample part 1

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Storm, CN weighted total product Runoff, and Storm inside tr worksheet curve sample

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