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34-515: Roosevelt Lake is the oldest of the six reservoirs constructed and operated by the Salt River Project. It also has the largest storage capacity of the SRP lakes with the ability to store 1,653,043 acre-feet (2.039 km) of water when the conservation limit of Roosevelt Dam is reached. When the dam is in flood-control mode, the lake can store 2,910,200  acre⋅ft (3.590 km) of water; however,

68-655: A U.S. survey foot (exactly ⁠ 1200 / 3937 ⁠   meters since 1893). On December 31, 2022, the National Institute of Standards and Technology , the National Geodetic Survey , and the United States Department of Commerce deprecated use of the US survey foot and recommended conversion to either the meter or the international foot. As a rule of thumb in US water management, one acre-foot

102-460: A furlong , and 80 chains in one statute mile . In metric terms, it is 20.1168  m long. By extension, chainage (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer . The chain has been used since the early 17th century in England, and was brought by British settlers during the colonial period to other countries around

136-507: A 100 link chain, 22 yards (66 feet) long, called the Gunter's Chain . Other surveyors chains have been used historically. A longer chain of 100 feet (30.5 m), with a hundred 1 foot (305 mm) links, was devised in the UK in the late 18th century by Jesse Ramsden , though it never supplanted Gunter's chain. Surveyors also sometimes used such a device, and called it the engineer's chain . In

170-505: A 20 m chain, and ±8 mm for a 30 m chain. In India, a revenue chain with 16 links and of length 10 m (33 ft) is used in cadastral surveys . Also in North America, a variant of the chain is used in forestry for traverse surveys . This modern chain is a static cord (thin rope) 50 metres long, marked with a small tag at each metre, and also marked in the first metre every decimetre . When working in dense bush,

204-703: A Gunter's (surveyor's) chain. Chains and links are commonly encountered in older metes and bounds legal descriptions. Distances on township plat maps made by the US General Land Office are shown in chains. Under the US Public Land Survey System , parcels of land are often described in terms of the section (640 acres or 259 hectares), quarter-section (160 acres or 64.7 hectares), and quarter-quarter-section (40 acres or 16.19 hectares). Respectively, these square divisions of land are approximately 80 chains (one mile or 1.6 km), 40 chains (half

238-509: A mile or 800 m), and 20 chains (a quarter mile or 400 m) on a side. The chain is still used in agriculture: measuring wheels with a circumference of 0.1 chain (diameter ≈ 2.1 ft or 64 cm) are still readily available in Canada and the United States. For a rectangular tract, multiplying the number of turns of a chain wheel for each of two adjacent sides and dividing by 1,000 gives

272-545: A place uniquely on any given route. Thus, a given bridge location may be indicated as 112 miles and 63 chains (181.51 km) from the origin. In the case of the photograph, the bridge is near Keynsham , which is that distance from London Paddington station . The indication "MLN" after the mileage is the Engineer's Line Reference describing the route as the Great Western Main Line , which is needed to uniquely determine

306-584: A quarter mile from the shore. The airstrip hosts numerous fly-ins a year. Acre-foot The acre-foot is a non- SI unit of volume equal to about 1,233 m commonly used in the United States in reference to large-scale water resources, such as reservoirs , aqueducts , canals , sewer flow capacity, irrigation water, and river flows . An acre-foot equals approximately an eight-lane swimming pool , 82 ft (25 m) long, 52 ft (16 m) wide and 9.8 ft (3 m) deep. As

340-579: A short axe or hatchet is commonly tied to the end of the chain, and thrown through the bush in the direction of the traverse. Another version used extensively in forestry and surveying is the hip-chain : a small box containing a string counter, worn on the hip. The user ties off the spooled string to a stake or tree and the counter tallies distance as the user walks away in a straight line. These instruments are available in both feet and metres . The lyrics of Three Chain Road , by Lee Kernaghan , include

374-430: A statute of Queen Elizabeth I as 5,280 feet, to tie in with agricultural practice . In 1620, the polymath Edmund Gunter developed a method of accurately surveying land using a surveyor's chain 66 feet long with 100 links. The 66-foot unit, which was four perches or rods, took on the name the chain. By 1675 it was accepted, and Ogilby wrote: ...a Word or two of Dimensurators or Measuring Instruments, whereof

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408-414: A strip of public land, usually 20 metres (or one chain in pre-metric measure) wide from the high water mark, that has been set aside for public use along the coast, around many lakes, and along all or part of many rivers. These strips exist in various forms (including road reserves, esplanade reserves, esplanade strips, marginal strips and reserves of various types) but not as extensively and consistently as

442-561: Is 22 yards, which is 66 feet (20.1168 m). This unit is a statute measure in the United Kingdom, defined in the Weights and Measures Act 1985 . One link is a hundredth part of a chain, which is 7.92 inches (20.1168 cm). The surveyor's chain first appears in an illustration in a Dutch map of 1607, and in an English book for surveyors of 1610. In 1593 the English mile was redefined by

476-487: Is approximately equivalent to 1.233 megaliters. Large bodies of water may be measured in cubic kilometers (1,000,000,000 m , or 1000 gigaliter), with 1 million acre-feet approximately equalling 1.233 km . Chain (unit) The chain (abbreviated ch ) is a unit of length equal to 66 feet (22 yards ), used in both the US customary and Imperial unit systems. It is subdivided into 100 links . There are 10 chains in

510-429: Is often assumed. The chain also survives as the length of a cricket pitch , being the distance between the stumps. Civil engineers and surveyors use various instruments including chains to measure distance. Other instruments used for measuring distance include tapes and bands. A steel band is also known as a "band chain". In 1620, the polymath Edmund Gunter developed a method of accurately surveying land using

544-423: Is still used on the railways as a location identifier. When railways were designed, the location of features such as bridges and stations was indicated by a cumulative longitudinal "mileage", using miles and chains, from a zero point at the origin or headquarters of the railway, or the originating junction of a new branch line. Since railways are linear in topology, the "mileage" or "chainage" is sufficient to identify

578-410: Is taken to be the planned annual water usage of a suburban family household. In some areas of the desert Southwest, where water conservation is followed and often enforced, a typical family uses only about 0.25 acre-foot per year (310  m /a) of water per year. One acre-foot/year is approximately 119 cu ft/d (3.38 m /d). The acre-foot per year has been used historically in

612-878: The Southwestern United States , the vara chain also called the Texas chain , of 20 varas (16.9164 m , or 55 + 1 ⁄ 2  ft) was used in surveying Spanish and later Mexican land grants, such as the major Fisher–Miller and Paisano Grants in Texas, several similarly large ones in New Mexico , and over 200 smaller ranchos in California . Metric chains, of lengths 5 m, 10 m, 20 m and 30 m, are widely used in India. Tolerances are ±3 mm for 5 m and 10 m chains, ±5 mm for

646-588: The U.S. Army Corps of Engineers requires all water over the conservation limit to be released from the lake within 20 days. Roosevelt Lake is located in central Arizona almost entirely within Gila County although a small portion lies in Maricopa County . Located about 4 miles (6.4 km) upstream from Apache Lake (the next SRP reservoir on the Salt River), Roosevelt Lake occupies about 10 miles (16 km) of

680-402: The 100-foot engineer's chain . In the United States, the chain is also used as the measure of the rate of spread of wildfires (chains per hour), both in the predictive National Fire Danger Rating System as well as in after-action reports. The term chain is used by wildland firefighters in day-to-day operations as a unit of distance. In Australia and New Zealand , most building lots in

714-716: The San Pedro River) are unclear. There are several Arizona Trail trailheads in the vicinity. The 800 miles (1,300 km) long hiking trail extending from the Arizona- Mexico border to Utah crosses the Salt River on the State Route 188 bridge that crosses Theodore Roosevelt Lake just northeast of Roosevelt Dam. The Lake is home to the Grapevine Airstrip , a small general aviation recreational airstrip located

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748-556: The US in many water-management agreements, for example the Colorado River Compact , which divides 15 million acre-feet per year (19 cubic kilometres per year) among seven western US states. Water reservoir capacities in the US are commonly given in thousands of acre-feet , abbreviated TAF or KAF . In most other countries except the US, the metric system is in common use and water volumes are normally expressed in liter , cubic meter or cubic kilometer . One acre-foot

782-539: The area in acres. In Canada, road allowances were originally 1 chain wide and are now 20 metres. The unit was also used in mapping the United States along train routes in the 19th century. Railroads in the United States have long since used decimal fractions of a mile. Some subways such as the New York City Subway and the Washington Metro were designed with and continue with a chaining system using

816-527: The bridge, as there may be points at 112 miles 63 chains on other routes. On new railway lines built in the United Kingdom such as High Speed 1 , the position along the alignment is still referred to as "chainage", although the value is now expressed in metres. The use of the chain was mandatory in laying out US townships. A federal law was passed in 1785 (the Public Land Survey Ordinance ) that all official government surveys must be done with

850-543: The globe. In the United Kingdom, there were 80 chains to the mile, but until the early nineteenth century the Scottish and Irish customary miles were longer than the statute mile ; consequently a Scots chain was about 74 (imperial) feet, an Irish chain 84 feet. These longer chains became obsolete following the adoption of the imperial system of units in 1824. In India, "metric chains" of exactly 20 metres (65.62 feet) are used, along with fractions thereof. The UK statute chain

884-564: The mosts usual has been the Chain, and the common length for English Measures 4 Poles, as answering indifferently to the Englishs Mile and Acre, 10 such Chains in length making a Furlong, and 10 single square Chains an Acre, so that a square Mile contains 640 square Acres...' From Gunter's system , the chain and the link became standard surveyors' units of length and crossed to the colonies. The thirteen states of America were expanding westward and

918-431: The name suggests, an acre-foot is defined as the volume of one acre of surface area to a depth of one foot . Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5  m ). There has been two definitions of the acre-foot (differing by about 0.0006%), using either the international foot (0.3048 m) or

952-698: The original Salt River riverbed and also extends for about 8 miles (13 km) up Tonto Creek , a significant tributary of the Salt with its headwaters along the Mogollon Rim . The lake covers much of the southern portion of the Tonto Basin, a low-lying area between the Sierra Ancha Mountains , Mazatzal Mountains (including Four Peaks ), and the Superstition Mountains . State Route 188 travels along

986-411: The past were a quarter of an acre, measuring one chain by two and a half chains, and other lots would be multiples or fractions of a chain. The street frontages of many houses in these countries are one chain wide—roads were almost always 1 chain (20.1 m) wide in urban areas, sometimes 1.5 chains (30.2 m) or 2.5 chains (50.3 m). Laneways would be half a chain (10.1 m). In rural areas

1020-536: The public land had to be surveyed for a cadastral . In 1784 Thomas Jefferson wrote a report for the Continental Congress proposing the rectangular survey system ; it was adopted with some changes as the Land Ordinance of 1785 on 20 May the following year. In the report, the use of the chain as a unit of measurement was mandated, and the chain was defined. The chain is the unit of linear measurement for

1054-494: The roads were wider, up to 10 chains (201.2 m) where a stock route was required. 5 chains (100.6 m) roads were surveyed as major roads or highways between larger towns, 3 chains (60.4 m) roads between smaller localities, and 2 chains (40.2 m) roads were local roads in farming communities. Roads named Three Chain Road etc. persist today. The "Queen's Chain" is a concept that has long existed in New Zealand, of

Theodore Roosevelt Lake - Misplaced Pages Continue

1088-505: The shore of the lake for much of its length. Tonto National Monument is located 4 miles (6.4 km) from Roosevelt Dam. Parts of the monument provide views of much of the reservoir. Tonto National Forest operates camping and day use areas around Roosevelt Lake. Fishing is a common recreational activity at Roosevelt Lake. The lake is home to a variety of game fish including crappie , carp , sunfish , flathead and channel catfish , and smallmouth bass and largemouth bass . There

1122-437: The survey of the public lands as prescribed by law. All returns of measurement in the rectangular system are made in the true horizontal distance in links, chains, and miles. The only exceptions to this rule are special requirements for measurement in feet in mineral surveys and townsite surveys. Linear Measurement Area Measurement In the United Kingdom, the chain is no longer used for practical survey work. However, it

1156-403: Was a slot size limit of between 13 and 16 inches for the bass, and only one can be taken per day. Until recently, Lake Roosevelt also hosted the state's most significant population of the federally endangered southwestern willow flycatcher . Since the lake's rise following heavy rains in the winter of 2005, the population dynamics between this site and the other significant Arizona population (on

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