Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Site name | Reason for designation\nBiological interest | Reason for designation\nGeological interest | Area\nHectares | Area\nAcres | Coordinates & Grid ref | Year in which notified | Other designations | Map & Citation |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Abney & Bretton Cloughs |  |  | 147.8 | 365.3 | 53°18′29″N 1°41′20″W﻿ / ﻿53.308°N 1.689°W\n    SK208790 | 1972 | NP | Map |
| Ambergate and Ridgeway Quarries |  |  | 1.0 | 2.5 | 53°03′29″N 1°28′01″W﻿ / ﻿53.058°N 1.467°W\n    SK358513 | 1963 | GCR | Map |
| Attenborough Gravel Pits |  |  | 226.6 | 559.9 | 52°53′56″N 1°13′41″W﻿ / ﻿52.899°N 1.228°W\n    SK520338 | 1982 | WT | Map |
| Bage Mine |  |  | 0.1 | 0.3 | 53°05′28″N 1°34′01″W﻿ / ﻿53.091°N 1.567°W\n    SK291549 | 1985 | GCR | Map |
| Baileycroft Quarry |  |  | 0.9 | 2.1 | 53°05′06″N 1°34′26″W﻿ / ﻿53.085°N 1.574°W\n    SK286543 | 1985 | GCR | Map |
| Ballidon Dale |  |  | 50.8 | 125.6 | 53°06′04″N 1°41′49″W﻿ / ﻿53.101°N 1.697°W\n    SK204560 | 1996 | NP, SAC | Map |
| Bee's Nest and Green Clay Pits |  |  | 15.0 | 37.0 | 53°05′13″N 1°38′35″W﻿ / ﻿53.087°N 1.643°W\n    SK240545 | 1990 | GCR, SAC | Map |
| Benty Grange |  |  | 21.1 | 52.0 | 53°10′26″N 1°46′55″W﻿ / ﻿53.174°N 1.782°W\n    SK146641 | 2012 |  | Map |
| Bonsall Leys |  |  | 15.4 | 38.2 | 53°06′47″N 1°36′22″W﻿ / ﻿53.113°N 1.606°W\n    SK265574 | 1993 |  | Map |
| Boulton Moor |  |  | 3.9 | 9.7 | 52°52′52″N 1°26′13″W﻿ / ﻿52.881°N 1.437°W\n    SK380316 | 1992 | GCR | Map |
| Bradbourne Mill Meadows |  |  | 6.9 | 17.0 | 53°04′05″N 1°42′14″W﻿ / ﻿53.068°N 1.704°W\n    SK199524 | 2011 |  | Map |
| Bradwell Dale and Bagshaw Cavern |  |  | 95.2 | 235.2 | 53°19′16″N 1°44′53″W﻿ / ﻿53.321°N 1.748°W\n    SK169805 | 1964 | GCR | Map |
| Bradwell Meadows |  |  | 0.9 | 2.3 | 53°19′19″N 1°44′10″W﻿ / ﻿53.322°N 1.736°W\n    SK177806 | 1990 |  | Map |
| Breadsall Railway Cutting |  |  | 4.9 | 12.0 | 52°57′11″N 1°25′08″W﻿ / ﻿52.953°N 1.419°W\n    SK391397 | 1986 | GCR, LNR, WT | Map |
| Calke Park |  |  | 71.1 | 175.8 | 52°48′04″N 1°27′58″W﻿ / ﻿52.801°N 1.466°W\n    SK361227 | 1992 |  | Map |
| Calton Hill |  |  | 5.2 | 12.7 | 53°14′20″N 1°49′41″W﻿ / ﻿53.239°N 1.828°W\n    SK116713 | 1951 | GCR | Map |
| Carver's Rocks |  |  | 16.7 | 41.2 | 52°48′00″N 1°30′43″W﻿ / ﻿52.8°N 1.512°W\n    SK330226 | 1963 |  | Map |
| Castleton |  |  | 837.3 | 2,069.1 | 53°20′13″N 1°48′11″W﻿ / ﻿53.337°N 1.803°W\n    SK132823 | 1954 | GCR, NP, NT | Map |
| Cawdor Quarry |  |  | 4.7 | 11.7 | 53°08′28″N 1°34′30″W﻿ / ﻿53.141°N 1.575°W\n    SK285605 | 1963 | GCR | Map |
| Chatsworth Old Park |  |  | 72.5 | 179.2 | 53°13′01″N 1°36′22″W﻿ / ﻿53.217°N 1.606°W\n    SK264689 | 1998 | NP | Map |
| Chrome and Parkhouse Hills |  |  | 30.7 | 75.9 | 53°12′07″N 1°53′42″W﻿ / ﻿53.202°N 1.895°W\n    SK071672 | 1951 | NP, RIGS | Map |
| Clough Woods |  |  | 109.4 | 270.4 | 53°09′04″N 1°37′19″W﻿ / ﻿53.151°N 1.622°W\n    SK254616 | 1964 | SM, NP | Map |
| Colehill Quarries |  |  | 11.3 | 27.9 | 53°05′31″N 1°34′26″W﻿ / ﻿53.092°N 1.574°W\n    SK286551 | 1985 | GCR | Map |
| Combs Reservoir |  |  | 32.0 | 79.1 | 53°18′43″N 1°56′38″W﻿ / ﻿53.312°N 1.944°W\n    SK038794 | 1986 |  | Map |
| Coombs Dale |  |  | 86.0 | 212.4 | 53°15′50″N 1°40′12″W﻿ / ﻿53.264°N 1.67°W\n    SK221742 | 1954 | NP, NCR, SAC | Map |
| Crabtree Wood |  |  | 3.5 | 8.7 | 53°18′04″N 1°15′58″W﻿ / ﻿53.301°N 1.266°W\n    SK490785 | 1981 |  | Map |
| Cressbrook Dale |  |  | 120.4 | 297.6 | 53°15′47″N 1°44′17″W﻿ / ﻿53.263°N 1.738°W\n    SK176740 | 1954 | GCR, NNR, NP, NCR, SAC | Map |
| Creswell Crags |  |  | 19.5 | 48.1 | 53°15′43″N 1°12′04″W﻿ / ﻿53.262°N 1.201°W\n    SK534742 | 1981 | SM, GCR | Map |
| Cromford Canal |  |  | 10.2 | 25.1 | 53°05′49″N 1°31′05″W﻿ / ﻿53.097°N 1.518°W\n    SK324556 | 1981 | LNR, WT | Map |
| Dale Quarry |  |  | 2.0 | 4.9 | 53°04′59″N 1°34′48″W﻿ / ﻿53.083°N 1.58°W\n    SK282541 | 1998 | GCR | Map |
| Dark Peak |  |  | 31,852.9 | 78,708.4 | 53°26′N 1°41′W﻿ / ﻿53.44°N 1.69°W\n    SK207937 | 1951 | SPA, GCR, NP, NT, NCR, SAC | Map |
| Dimminsdale |  |  | 37.0 | 91.4 | 52°47′28″N 1°26′38″W﻿ / ﻿52.791°N 1.444°W\n    SK376216 | 1981 | WT | Map |
| Dirtlow Rake and Pindale |  |  | 23.2 | 57.4 | 53°20′10″N 1°46′08″W﻿ / ﻿53.336°N 1.769°W\n    SK155821 | 1990 | GCR | Map |
| Doe Lea Stream Section |  |  | 0.1 | 0.3 | 53°13′05″N 1°18′50″W﻿ / ﻿53.218°N 1.314°W\n    SK459692 | 1988 | GCR, LNR | Map |
| Dove Valley and Biggin Dale |  |  | 691.5 | 1,708.8 | 53°03′47″N 1°47′02″W﻿ / ﻿53.063°N 1.784°W\n    SK146518 | 1954 | GCR, NNR, NCR, SAC | Map |
| Dovedale Wood |  |  | 13.4 | 33.2 | 53°09′47″N 1°18′22″W﻿ / ﻿53.163°N 1.306°W\n    SK465631 | 1982 | NT | Map |
| Duchy Quarry |  |  | 2.4 | 5.8 | 53°17′13″N 1°51′43″W﻿ / ﻿53.287°N 1.862°W\n    SK093767 | 1985 | GCR | Map |
| Duckmanton Railway Cutting |  |  | 3.8 | 9.4 | 53°13′41″N 1°22′05″W﻿ / ﻿53.228°N 1.368°W\n    SK423703 | 1974 | GCR | Map |
| Eastern Peak District Moors |  |  | 8,193.4 | 20,246.2 | 53°12′14″N 1°32′53″W﻿ / ﻿53.204°N 1.548°W\n    SK303675 | 1964 | SM, SPA, ESA, GCR, WT, NP, NT, SAC | Map |
| Edale |  |  | 15.0 | 37.0 | 53°21′54″N 1°51′25″W﻿ / ﻿53.365°N 1.857°W\n    SK096854 | 1966 | GCR, National Trust | Map |
| Fall Hill Quarry |  |  | 4.1 | 10.2 | 53°09′29″N 1°28′26″W﻿ / ﻿53.158°N 1.474°W\n    SK353624 | 1990 | GCR | Map |
| Fox Hole Cave |  |  | 0.2 | 0.4 | 53°11′31″N 1°51′11″W﻿ / ﻿53.192°N 1.853°W\n    SK099661 | 1986 | GCR | Map |
| Gang Mine |  |  | 8.3 | 20.5 | 53°05′53″N 1°34′26″W﻿ / ﻿53.098°N 1.574°W\n    SK286557 | 1988 | NCR, SAC | Map |
| Ginny Spring, Whitwell Wood |  |  | 4.0 | 9.9 | 53°18′18″N 1°13′23″W﻿ / ﻿53.305°N 1.223°W\n    SK519789 | 1963 |  | Map |
| Goyt Valley |  |  | 1,332.6 | 3,292.9 | 53°16′05″N 1°57′32″W﻿ / ﻿53.268°N 1.959°W\n    SK028746 | 1951 | SPA, SAC | Map |
| Green Lane Pits |  |  | 6.6 | 16.2 | 53°09′36″N 1°45′18″W﻿ / ﻿53.16°N 1.755°W\n    SK165626 | 1986 | GCR | Map |
| Hallam Barn Grasslands |  |  | 5.1 | 12.7 | 53°20′49″N 1°43′08″W﻿ / ﻿53.347°N 1.719°W\n    SK188834 | 2011 |  | Map |
| Harewood Grange Stream Section |  |  | 5.9 | 14.5 | 53°12′43″N 1°32′13″W﻿ / ﻿53.212°N 1.537°W\n    SK310684 | 1963 | GCR, NP | Map |
| Hilton Gravel Pits |  |  | 31.2 | 77.0 | 52°52′44″N 1°37′52″W﻿ / ﻿52.879°N 1.631°W\n    SK249314 | 1981 | GCR, WT | Map |
| Hipley Hill |  |  | 22.1 | 54.6 | 53°05′24″N 1°40′59″W﻿ / ﻿53.09°N 1.683°W\n    SK213548 | 1963 |  | Map |
| Hollinhill and Markland Grips |  |  | 19.9 | 49.1 | 53°16′08″N 1°14′17″W﻿ / ﻿53.269°N 1.238°W\n    SK509749 | 1963 |  | Map |
| Hulland Moss |  |  | 2.8 | 6.8 | 53°00′43″N 1°37′44″W﻿ / ﻿53.012°N 1.629°W\n    SK250461 | 1981 |  | Map |
| Hurdlow Meadows |  |  | 11.3 | 27.9 | 53°11′46″N 1°48′50″W﻿ / ﻿53.196°N 1.814°W\n    SK125666 | 2005 |  | Map |
| Jumble Coppice |  |  | 0.7 | 1.8 | 53°14′42″N 1°36′00″W﻿ / ﻿53.245°N 1.6°W\n    SK268721 | 1985 | GCR | Map |
| Kedleston Park |  |  | 93.5 | 231.1 | 52°58′01″N 1°32′17″W﻿ / ﻿52.967°N 1.538°W\n    SK311412 | 1996 |  | Map |
| Kirkham's Silica Sandpit |  |  | 30.4 | 75.0 | 53°05′02″N 1°40′44″W﻿ / ﻿53.084°N 1.679°W\n    SK216541 | 1992 | GCR | Map |
| Lathkill Dale |  |  | 273.7 | 676.3 | 53°11′06″N 1°44′28″W﻿ / ﻿53.185°N 1.741°W\n    SK174653 | 1954 | GCR, NNR, NP, NCR, SAC | Map |
| Lee Farm Meadow, Tideswell |  |  | 1.5 | 3.7 | 53°18′11″N 1°48′29″W﻿ / ﻿53.303°N 1.808°W\n    SK129785 | 1986 | NP | Map |
| Leek Moors |  |  | 3,970.8 | 9,812.2 | 53°10′52″N 1°59′10″W﻿ / ﻿53.181°N 1.986°W\n    SK010649 | 1954 | SPA, ESA, GCR, NP, SAC | Map |
| Long Dale & Gratton Dale |  |  | 80.6 | 199.2 | 53°08′17″N 1°41′53″W﻿ / ﻿53.138°N 1.698°W\n    SK203601 | 1965 | NNR, NP, NCR, SAC | Map |
| Long Dale, Hartington |  |  | 53.5 | 132.1 | 53°09′04″N 1°47′42″W﻿ / ﻿53.151°N 1.795°W\n    SK138616 | 1997 | SAC | Map |
| Longstone Moor |  |  | 106.8 | 264.0 | 53°15′36″N 1°42′50″W﻿ / ﻿53.26°N 1.714°W\n    SK192737 | 1990 | SM, NP | Map |
| Lower Hollins |  |  | 5.4 | 13.2 | 53°21′50″N 1°48′07″W﻿ / ﻿53.364°N 1.802°W\n    SK133852 | 2011 |  | Map |
| Lower Peaslows Farm Meadow |  |  | 0.7 | 1.7 | 53°19′23″N 1°52′59″W﻿ / ﻿53.323°N 1.883°W\n    SK079807 | 2005 |  | Map |
| Ludworth Intake |  |  | 5.3 | 13.0 | 53°24′58″N 2°00′36″W﻿ / ﻿53.416°N 2.01°W\n    SJ994910 | 1998 | GCR | Map |
| Masson Hill |  |  | 76.1 | 188.0 | 53°07′26″N 1°34′01″W﻿ / ﻿53.124°N 1.567°W\n    SK291586 | 1989 | GCR | Map |
| Matley Moor Meadows |  |  | 3.3 | 8.0 | 53°24′07″N 1°57′54″W﻿ / ﻿53.402°N 1.965°W\n    SK024895 | 2011 |  | Map |
| Matlock Woods |  |  | 19.0 | 46.9 | 53°06′43″N 1°33′40″W﻿ / ﻿53.112°N 1.561°W\n    SK295573 | 1981 | SAC | Map |
| Mercaston Marsh and Muggington Bottoms |  |  | 14.3 | 35.4 | 52°59′06″N 1°36′04″W﻿ / ﻿52.985°N 1.601°W\n    SK269432 | 1990 |  | Map |
| Monk's Dale |  |  | 105.5 | 260.8 | 53°15′43″N 1°47′56″W﻿ / ﻿53.262°N 1.799°W\n    SK135739 | 1955 | NNR, NP, NCR, SAC | Map |
| Morley Brick Pits |  |  | 1.8 | 4.4 | 52°58′16″N 1°25′26″W﻿ / ﻿52.971°N 1.424°W\n    SK388417 | 1963 |  | Map |
| Moss Valley |  |  | 26.1 | 64.5 | 53°18′58″N 1°22′26″W﻿ / ﻿53.316°N 1.374°W\n    SK418801 | 1951 |  | Map |
| Moss Valley Meadows |  |  | 17.9 | 44.2 | 53°20′02″N 1°25′23″W﻿ / ﻿53.334°N 1.423°W\n    SK385820 | 1990 |  | Map |
| Moss Valley Woods |  |  | 17.9 | 44.2 | 53°19′01″N 1°26′42″W﻿ / ﻿53.317°N 1.445°W\n    SK371801 | 1993 |  | Map |
| Mount Pleasant |  |  | 3.0 | 7.3 | 53°01′19″N 1°34′52″W﻿ / ﻿53.022°N 1.581°W\n    SK282473 | 2011 |  | Map |
| Ogston Reservoir |  |  | 95.9 | 237.0 | 53°08′10″N 1°26′31″W﻿ / ﻿53.136°N 1.442°W\n    SK374600 | 1963 |  | Map |
| Oxlow Rake |  |  | 6.0 | 14.9 | 53°19′08″N 1°48′32″W﻿ / ﻿53.319°N 1.809°W\n    SK128803 | 1992 |  | Map |
| Parwich Moor |  |  | 15.8 | 38.9 | 53°07′01″N 1°44′28″W﻿ / ﻿53.117°N 1.741°W\n    SK174578 | 1965 | NP | Map |
| Pleasley Vale Railway |  |  | 3.5 | 8.7 | 53°10′41″N 1°13′23″W﻿ / ﻿53.178°N 1.223°W\n    SK520648 | 1981 | LNR | Map |
| Poole's Cavern and Grin Low Wood |  |  | 41.5 | 102.6 | 53°14′49″N 1°55′37″W﻿ / ﻿53.247°N 1.927°W\n    SK050722 | 1963 | GCR | Map |
| Portway Mine |  |  | 4.2 | 10.5 | 53°19′37″N 1°48′32″W﻿ / ﻿53.327°N 1.809°W\n    SK128811 | 1990 | GCR | Map |
| River Derwent at Hathersage |  |  | 7.9 | 19.4 | 53°19′48″N 1°40′23″W﻿ / ﻿53.33°N 1.673°W\n    SK219815 | 1992 |  | Map |
| River Mease |  |  | 22.9 | 56.5 | 52°42′18″N 1°35′35″W﻿ / ﻿52.705°N 1.593°W\n    SK276120 | 2000 | SAC | Map |
| Rose End Meadows |  |  | 48.4 | 119.7 | 53°06′25″N 1°35′28″W﻿ / ﻿53.107°N 1.591°W\n    SK275567 | 1996 |  | Map |
| Rowlee Bridge |  |  | 1.0 | 2.4 | 53°23′56″N 1°46′55″W﻿ / ﻿53.399°N 1.782°W\n    SK146891 | 1986 | GCR | Map |
| Shining Cliff Woods |  |  | 119.3 | 294.9 | 53°04′30″N 1°30′14″W﻿ / ﻿53.075°N 1.504°W\n    SK333532 | 1954 |  | Map |
| South Lee Meadows |  |  | 2.2 | 5.3 | 53°20′10″N 1°44′46″W﻿ / ﻿53.336°N 1.746°W\n    SK170821 | 2011 |  | Map |
| Stoney Middleton Dale |  |  | 71.3 | 176.2 | 53°16′52″N 1°40′59″W﻿ / ﻿53.281°N 1.683°W\n    SK212761 | 1972 | GCR | Map |
| Teversal To Pleasley Railway |  |  | 5.0 | 12.4 | 53°09′54″N 1°16′19″W﻿ / ﻿53.165°N 1.272°W\n    SK488633 | 1982 | LNR, WT | Map |
| The Wye Valley |  |  | 595.0 | 1,470.3 | 53°14′17″N 1°43′01″W﻿ / ﻿53.238°N 1.717°W\n    SK190713 | 1954 | GCR, WT, NP, NCR, SAC | Map |
| Ticknall Quarries |  |  | 29.5 | 73.0 | 52°48′36″N 1°28′08″W﻿ / ﻿52.81°N 1.469°W\n    SK359237 | 1963 | GCR, NT | Map |
| Tideslow Rake |  |  | 9.7 | 24.0 | 53°17′56″N 1°46′34″W﻿ / ﻿53.299°N 1.776°W\n    SK150780 | 1990 | SM, NP | Map |
| Toddbrook Reservoir |  |  | 19.4 | 48.0 | 53°19′26″N 1°59′49″W﻿ / ﻿53.324°N 1.997°W\n    SK003808 | 1963 |  | Map |
| Topley Pike and Deepdale |  |  | 65.2 | 161.0 | 53°14′28″N 1°51′22″W﻿ / ﻿53.241°N 1.856°W\n    SK097716 | 1965 | NP, NCR, SAC | Map |
| Upper Lathkill |  |  | 26.8 | 66.3 | 53°12′18″N 1°47′20″W﻿ / ﻿53.205°N 1.789°W\n    SK142676 | 1989 | GCR, NP | Map |
| Via Gellia Woodlands |  |  | 219.2 | 541.6 | 53°06′29″N 1°35′38″W﻿ / ﻿53.108°N 1.594°W\n    SK273568 | 1954 | GCR, SAC | Map |
| Wall Lands |  |  | 8.9 | 22.1 | 53°04′26″N 1°39′40″W﻿ / ﻿53.074°N 1.661°W\n    SK228530 | 2011 |  | Map |
| Waterswallows Quarry |  |  | 0.7 | 1.7 | 53°16′19″N 1°52′48″W﻿ / ﻿53.272°N 1.88°W\n    SK081750 | 1993 | GCR | Map |
| Wyns Tor |  |  | 3.1 | 7.7 | 53°08′17″N 1°38′35″W﻿ / ﻿53.138°N 1.643°W\n    SK240602 | 1972 | GCR | Map |
| Yarncliff Wood, Padley |  |  | 25.8 | 63.9 | 53°18′36″N 1°37′23″W﻿ / ﻿53.31°N 1.623°W\n    SK252793 | 1972 | NT | Map |
Question:
how many sites were designated for both biological and geological interest?
Answer:
17